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ASR9000/XR: Using Satellite (Technote)

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Introduction

This document provides a guide on how to use the satellite (ASR9000v) with the ASR9000 and ASR9900 series routers. It will be discussed what you can and cannot do, how to verify the satellite operation and use cases.

 

This document is written assuming that 5.1.1 or greater software release will be used.

 

Core Issue

Satellite is a relatively new technology that was introduced in XR 4.2.1. Satellite provides you a great and cheap way to extend your 1G ports by using this port-extender which is completely managed out of the ASR9000. The advantage is that you may have 2 devices, but 1 single entity to manage. All the satellite ports are showing up in the XR configuration of the ASR9000.

Another great advantage of the Satellite is that you can put it on remote locations, miles away from the ASR9000 host!

 

The basics

Although there is a limit to the number of satellites you can connect to an ASR9000 (cluster), the Satellite general concept of ASR9000 is shown here in this picture:

 

Screen Shot 2013-07-14 at 8.16.49 AM.png

The physical connections are very flexible. The link between the Satellite and the ASR9000 is called the ICL or "Inter Chassis Link".

This link transports the traffic from the satellite ports to the 9000 host.

In the ASR9000 host configuration you define how the satellite ports are mapping between the ICL and the satellite ports.

You can statically pin ports from the Satellite to a single uplink (that means there is no protection, when that uplink fails, those satellite

ports become unusable), or you can bundle uplinks together and assign a group of ports to that bundle. This provides redundancy,

but with the limitation that the satellite ports that are using an uplink bundle, can't be made part of a bundle themselves.

We'll talk about restrictions a bit later.

 

In the picture below you see Access Device A1 connecting with a bundle that uses uplink (green) to the 9k host LC-2.

A second satellite has all their ports in a bundle ICL.

 

Note that there is no bandwidth constraints enforced, so theoretically you can have a 2 member ICL bundle and 30 Satellite ports mapped to it, but that would mean there is oversubscription.

 

 

Screen Shot 2013-07-14 at 8.16.58 AM.png

 

While the ASR9000v/Satellite is based on the Cisco CPT-50, you cannot convert between the 2 devices by loading different software images.

You can't use the 9000v as a standalone switch, it needs the ASR9000 host.

Visual differences include that the 9000v starts the port number at 0, where the CPT starts at 1. Also the CPT has 4 different power options

and the ASR9000v only 3: AC-A, DC-A, DC-E (A for Ansi, E for ETSI).

 

Satellite packet format over L1 topologies looks like this; there is a simple sneaky dot1q tag added which we call the nV tag:

Screen Shot 2013-07-14 at 9.28.54 AM.png

 

In L2 topologies, such as simple ring, we use dot1ad.

 

 

Licensing

There is a license required to run the ASR9000v. There are 3 licenses for 1, 5, or 20 Satellites per 9k host named:

  • A9K-NVSAT1-LIC
  • A9K-NVSAT5-LIC
  • A9K-NVSAT20-LIC

While licenses are not hard enforced, this meaning the system will still work even though a license may not be present, however you are urged to obtain the proper license, syslog messages will show the "violation of use".

Note when using simple ring, a host license for each satellite is needed on each host. E.g. a simple ring with three satellites requires six A9K-NVSAT1-LIC licenses.

 

 

 

Optics

A variety of optics are supported on the ASR9000v, they may not be always the same as the ASR9000. Reference this link for the supported optics for ASR9000/9000v.

When using Tunable optics for the 9000v, pay attention to the following: 

(*) note for the tunable optic on the IRL you need to set the wavelength the first time via the 9000v shell on insertion of the optic before shipping it to the destined location.

 

Handling of Unsupported Optics

For the 9000v ports we do not support the 'service unsupported-transceiver' or 'transceiver permit pid all' commands.

 

The satellite device simply flags an unsupported transceiver without disabling the port or taking any further action. As long as the pluggable is readable by the satellite the SFP may work, but there are no additional 'hacks' such as the hidden commands beyond what is shown as supported in the tables from the supported optic reference link.

 

Software and hardware requirements

The following software and hardware requirements exist for the ASR9000v. Although support started in XR4.2.1 My personal recommendation is to go with XR43 (latest) as many initial restrictions are lifted from the first release:

 

1. SW requirement:

Minimum version is XR 4.2.1

2. HW requirement – Chassis

  • Host ASR9K support for ASR 9006 or 9010 (4.2.1)
  • Support for ASR 9001and 9922 added (4.3.0)
  • Host ASR9K may be a single host, a cluster of two ASR9Ks acting as one logical router, or dual host (5.1.1)

3. HW requirement – Line cards and RSP

  • RSP must be RSP440 or RSP2 (only supported with the 9000v)
  • Satellite ICL connection must be from a Typhoon based LC
  • LC may be –TR or –SE. If –TR, each satellite access GigE port gets 8 TM queues
  • Trident based LCs and the SIP-700 can co-exist in the system but cant be used to connect *directly* to the ICL ports. Can forward traffic to/ from satellite ports.
  • ISM/ CDS video card could co-exist in the system, but can’t stream video flows to the satellite port in 4.2.1 release. Plan to be supported in future release

 

 

4. ASR901 as a Satellite

  • Supported for nV satellite since 4.3.0 (901-1G)
  • Supported for nV satellite since 5.1.1 (901-10G)
  • On both the 1G and 10G versions only 1G ICL are supported at this time in ports G0/10 and G0/11. 10G and other ports, such as TDM, are not supported
  • Supports satellite interfaces from SatId/0/0/0 to SatId/0/0/9
  • Combo ports 4-7 are set to auto-select. When both copper and fiber are connected fiber is selected, removing fiber switches to copper mode, and reconnecting fiber moves back to fiber.

 

Note: If  the wrong port is used for ICL then the link will stay down on the 901.  Once the correct ICL port is used and the 9K configured then a reload  of the 901 will need to occur for the link to come up and the 901 become  recognized as a satellite.

 

Feature support

Generally speaking all features supported on physical GigE ports of ASR9K are also automatically supported on the GigE ports of the

satellite switch such as L2, L3, multicast, MPLS, BVI, OAM … (everything that works on a normal GigE).

Features for the 9000v get applied on the following points :

–L1 features: applied on the satellite chassis

Ethernet auto-negotiation, link MTU, shut/ no shut, L1 stats, ICL link aggregation
–All other features: applied on the 9K chassis
All non-L1 features (L2/ L3/ QoS/ ACLs etc)
Example: QoS ingress policer configured on a satellite access GigE port is applied only once the packets reach the ASR9K. Similarly for ACLs, OAM etc
 
Notes:
Some of these features are now offloaded to the satellite, such as QoS and syncE

 

 

5. Features running specifically on the 9000v/Satellite

  • Admin state (shut/no shut)
  • Ethernet MTU
  • Ethernet link auto-negotiation including
  • Half/ full duplex
  • Link speed
  • Flow control (only RX flow control supported in 4.2.1 on access GigEs)
  • Static configuration of auto-neg parameters (speed, duplex, flow ctrl)
  • Carrier delay
  • L1 packet loopback
  • Line loopback (pkt rx on access GigE looped back to tx)
  • Internal loopback (pkt about to tx on access GigE looped back to rx)
  • TX laser disable

 

6. Exceptions

 

1) The following features are not supported on satellite ports in 5.1.1

     

    *Need to update this*

     

     

    2) When the ICL is a link bundle, there are some restrictions :

    • LAG (link bundles) not supported on satellite access GigEs (i.e. no “LAG over LAG” support)
    • ICL LAG must be a static EtherChannel (“mode on”); no LACP support on the ICL

     

     

     

     

    Oversubscription and QoS

    QoS can be applied on the ASR9000 host (runs on the NP where the satellite ports have their interface descriptors) or offloaded to the satellite

    When you have oversubscription, that is more then the number of 1G ports compared to the ICL total speed there could be a potential issue. However there is an implicit trust model for all high priority traffic.

    Automatic packet classification rules determine whether a packet is control packet (LACP, STP, CDP, CFM, ARP, OSPF etc), high priority data (VLAN COS 5,6,7, IP prec 5, 6, 7) or normal priority data and queued accordingly

     

    For the downstream direction, that is 9000 host to the Satellite, the "standard" QOS rules and shaping are sufficient enough to warrant the delivery of high priority packets to the satellite ports. (e.g. inject to wire etc).

     

     

    7. QoS Offload

    As  the ICL link between the satellite and host may be oversubscribed by  access interfaces, configuring QoS on the satellite itself is optimal  for avoiding the lose of high priority traffic due to congestion. This feature was introduced in 5.1.1

     

    3 steps to configuring QoS offload

    • Create class map
    • Create QoS policy map
    • Bind the QoS polciy to the  satellite (physical access interface, bundle access interface, physical  ICL interface, or bundle ICL interface)

     

    QoS Offload.png

     

    INPUT access interface (CLI config) example:

    class-map match-any my_class

    match dscp 10

    end-class-map

    !

    policy-map my_policy

    class my_class

      set precedence 1

    !

    end-policy-map

    !

    interface GigabitEthernet100/0/0/9

    ipv4 address 10.1.1.1 255.255.255.0

    nv

       service-policy input my_policy

    !

     

     

    Loadbalancing on bundle ICL

    Traffic is hashed across members of this ICL LAG based on satellite access port number. No packet payload information (MAC SA/ DA or IP SA/ DA) used in hash calculation.  This ensures that QoS applied on ASR9K for a particular satellite access port works correctly over the entire packet stream of that access port.  Current hash rule is simple (port number modulo # of active ICLs)

     

     

    Initial system bring up

    8. Hardware

    Plug-and-play installation: No local config on satellite, no need to even telnet in!

     

    1. Unpack new ASR 9000v; rack, stack, connect power
    2. Plug in ASR 9000v qualified optics of correct type into any 1 or more of the SFP+ slots & appropriate qualified optics into SFP+ or XFP slots on host ASR9K. Connect via SMF/ MMF fiber
    3. Note: Actual SFP+ port on ASR 9000v does not matter; connect the 10G fibers from 9K to any of the 10G SFP+ ports on the 9000v in any order. No need to line these up => further plug and play.
    4. Configure satellite via CLI/ XML on ASR 9K host 10G ports
    5. Power up ASR 9000v chassis
    6. ASR 9000v chassis turn up status check based on chassis error LEDs on front face plate
    7. Critical Error LED comes ON => Critical hardware failure; need to swap 9000v hardware
    8. Major Error LED comes ON => Hardware okay, unable to connect to ASR9K host
    9. Check fiber connectivity and L1 path/ optics between  ASR9K and 9000v
    10. Check ICL configuration on ASR9K
    11. Check chassis serial number on ASR 9000v (rear plate) against any configured S/N on ASR9K
    12. Both Critical and Major Error LEDs stay OFF => ASR 9000v is up and connected to host ASR9K;  now fully manageable via host ASR9K and ready to go.
    13. Can do satellite ethernet port packet loopback tests (through ASR9K) if needed to check end to end data path
    14. Note: If satellite software requires upgrade, it will raise notification on host ASR9K. User can then do an inband software upgrade from the ASR9K if needed (use “show nv satellite status” on host ASR9K from here on to check status as described next) 

     

     

    9. Management configuration

     

    It is recommended to use the auto-IP feature, no loopback or VRF need to be defined. A VRF **nVSatellite will be auto-defined and does not count towards the number of VRFs configured (for licensing purposes).

     

     

    10. Define Satellite device

    Creates satellite “100” of type ASR 9000v; assign management IP addr
     
    • router(config)# nv satellite 100
    • router(config-nV)# type asr9000v
    • router(config-satellite)# ipv4 address 192.168.0.100

     

    Optional config chassis serial number (for authentication and simple ring) & description
    • router(config-satellite)# serial-number cat12345678
    • router(config-satellite)# description 1194N Mathilda Sunnyvale

     

    Optional config secret password for satellite login. Note that the username is 'root'

    • router(config-satellite)# secret [0 | 5 | LINE] password

     

    11. Setting up the ICL

    There are two options for ICL:

    That is static pinning; designate some ports from the satellite to use a dedicated uplink.

    Using a bundle ICL that provides for redundancy when one uplink fails.

    Static pinning

    Create a 10G ICL connected to satellite 100
    Map this ICL to satellite access GigE ports 0 through 5
     
    • router(config)# interface TenGigabitEthernet 0/1/0/0
    • router(config-if)# nv satellite-fabric-link satellite 100
    • router(config-satellite-fabric-link)#   remote-ports GigabitEthernet 0/0/0-5

     

    Bundle ICL

    All interfaces mapped to an ICL bundle:

     

    ASR9000 TenG interface putting into bundle mode ON (No LACP support)

    • router(config)# interface TenGigabitEthernet 0/2/0/1
    • router(config-if)# bundle id 10 mode on

     

    Define the bundle ethernet on the ASR9000 host, and designate which ports will be mapped to the bundle:

    • router(config)# interface Bundle-Ethernet 10
    • router(config-if)# nv satellite-fabric-link satellite 200
    • router(config-satellite-fabric-link)#   remote-ports GigabitEthernet all

     

    12. Note

     

    Config sequence restrictions

    Because of the order and batching in which things get applied in XR there are some things that you need to know when it comes down to negating certain config which additions of others.

    Examples of this are:

    1.Configuration batches containing changes to ICL and Satellite-Ether configuration in the same batch may fail
    2.Configuration on Satellite-Ethers is not guaranteed to be applied cleanly if there are nV configuration conflicts present
    3.ICL configuration must be removed prior to deleting an interface (in the case of Bundle ICLs)

    In such cases, failures are expected to be seen; generally speaking,  failures are expected to be deterministic, and workarounds available

    (re-apply the configuration in two commit batches)

    Recommendation to users is to commit ICL configuration changes in separate commits to Satellite-Ether configuration changes

     

     

     

     

     

    Advanced Satellite Topologies

    Starting in 5.1.1 many new features were added to expand upon the basic single host hub-and-spoke model. These features take more configuration than the base satellite configuration and will be discussed below.

     

     

    13. Dual Hosts

    Starting in 5.1.1 the ability for a satellite (hub-and-spoke) or a ring of satellites (simple ring) to be dual-homed to two hosts was added. (nV Edge acts as one logical router)

     

    With this configuration one ASR9K host is the active and the other is standby. Data and control traffic from the satellite will flow to the active host, but both hosts will send and receive management traffic via the SDAC protocol. This is used to determine connectivity, detect failures, sync the configuration, etc.

    The two hosts communicate management information via ICCP with a modified version of SDAC called ORBIT.

     

     

    Dual Hosts.png

     

    Supported Topologies:

                Hub-and-spoke dual hosts

    9000v with 10G ICL or bundle ICL

    901 with 1G ICL

    9000v (10G) or 901 (1G) using L2 fabric sub-interfaces

    Satellites may be partitioned

    Simple ring dual hosts

    9000v with 10G ICL

    901 with 1G ICL

             Satellites may not be partitioned

    Note: Partitioning is when you carve out certain access ports to be used by certain ICL interfaces

     

    Current limitations:

    Must be two single chassis, no clusters

    Load balancing is active/standby per satellite, per access port planned

    No user configuration sync between hosts

     

    Configuration Differences:

    The most notable changes when coming from a simple hub-and-spoke design is ICCP, and adding the satellite serial number.

     

     

    Example

    Router 1

    redundancy

    iccp

      group 1

       member

        neighbor 172.18.0.2

       !

       nv satellite

        system-mac <mac> (optional)

       !

      !

    !

    !

    nv

    satellite 100

    type asr9000v

    ipv4 address 10.0.0.100

    redundancy

      host-priority <priority> {optional)

    !

    serial-number <satellite serial>

    !

    vrf nv_mgmt

    !

    interface loopback 10

    vrf nv_mgmt

    ipv4 address 10.0.0.1

    !

    interface Loopback1000

    ipv4 address 172.18.0.1 255.255.255.255

    !

    interface GigabitEthernet0/1/0/4

    ipv4 address 192.168.0.1 255.255.255.0

    !

    interface ten 0/0/0/0

    ipv4 point-to-point

    ipv4 unnumbered loopback 10

    nv

      satellite-fabric-link [network satellite <> | satellite <>]

       redundancy

        iccp-group 1

       remote-ports gig 0/0/0-43

       !

    !

    !

    mpls ldp

    router-id 172.18.0.1

       discovery targeted-hello accept

        neighbor 172.18.0.2

       !

    !

    !

    router static

    address-family ipv4 unicast

       172.18.0.2/32 192.168.0.2

    !

    !

     

     

     

     

    14. Simple Ring Topology

    Starting in 5.1.1 we have the ability to support more than just simple hub-and-spoke. The ring topology allows for satellite chaining, cascading, and in general a more advanced satellite network.

     

    Requirements and Limitations:

    • Must use 9000v (10G) or 901 (1G) as satellites
    • Satellites may not be partitioned
    • A satellite must be connected to two hosts
    • A host may only be in one dual-home pairing
    • Bundle ICLs cannot be used

     

     

    Configuration:

    This is essentially the same as the dual hosts setup, but the network option must be used when entering 'satellite-fabirc-link'

     

     

     

    15. Cascading Topology

    This is treated as special ring and works the same way as simple ring.

    The biggest difference is that in 5.1.1 cascading supports single host while simple ring does not.

     

    ring topology.png

     

     

     

    16. L2 Fabric Topology

    Starting in 5.1.1 we have the ability to extend the ICL across an EVC. Normally an IRL is a L1 connection. This increases the flexibility of satellite by allowing for greater distances between the ASR9K host and the satellite device.

     

    Requirements and limitations:

    • Manual and auto-IP mode supported
    • Single home and dual home are supported
    • Encapsulation type can be dot1q or dot1ad
    • Host EVC is provisioned as a sub-interface
    • Different VLANs should be used as a satellite cannot support multiple layer 2 fabric connections with the same VLAN on the same ICL
    • The same L2 encapsulation must be used by both hosts
    • Usable VLAN range is 2 to 4093 for 9000v (4094 for 901)
    • Bundle ICLs are not supported
    • P2MP L2 cloud is not supported
    • When a bundle is configured on the access ports 'bundle wait timer 0' should be configured to improve convergence times
    • Service state synchronization is not supported for the following: ANCP, IGMP, ARP, DHCP
    • Ethernet CFM is required

     

     

    L2 Fabric.png

     

     

    Configuration:

    On Active-Host:

    interface TenGigE0/1/0/23.200

    encapsulation dot1q 200

    !

    nv

    satellite-fabric-link satellite 200

       redundancy

          iccp-group 1

    !

       remote-ports GigabitEthernet 0/0/0-43

    !

    On Standby-Host:

    interface TenGigE0/1/1/0.200

    encapsulation dot1q 220

    !

    nv

    satellite-fabric-link satellite 200

       redundancy

        iccp-group 1

        !

        remote-ports GigabitEthernet 0/0/0-43

    !

    Note: L2 cloud configuration not shown

     

     

     

     

     

     

     

     

     

     

    System monitoring and troubleshooting

    17. Basic status check

    Screen Shot 2013-07-14 at 9.23.14 AM.png

     

    18. Upgrade and Software

    Screen Shot 2013-07-14 at 9.23.30 AM.png

     

    'show nv satellite status'

    • State: One of the following:           
      • No configured links: No satellite-fabric-links have been configured for this satellite
      • Discovering: The SDACP discovery protocol is running on at least one satellite-fabric-link, but discovery has not completed
      • Authenticating: The TCP session to the satellite has been established, and the control protocol is authenticating the satellite
      • Authentication Failed: The satellite provided incorrect authentication data
      • Checking Version:  The version of the software running on  the satellite is being checked  for compatibility with the running  version of IOS-XR on the host

      • Incorrect version: The version of the software running on the satellite is incompatible with the host
      • Connected: The control protocol sessions to the satellite has been fully established.
    • Install State: shown after State, in brackets. One of the following:              
      • Stable: The satellite has the correct image loaded and it is running
      • Transferring: A new image is being transferred to the satellite
      • Transferred: A new image has been successfully transferred to the satellite, but not yet installed
      • Installing: A new image is being installed on the satellite
      • Unknown: The install state of the satellite cannot be determined at this time
    • Type: The configured type of the satellite.
    • Description: The configured description for the satellite
    • MAC Address: The chassis MAC of any discovered satellite
    • IPv4 Address: The configured IPv4 address of the satellite
    • Received Serial Number: (If control protocol has reached the authentication state): The serial number the satellite has presented
    • Configured Serial Number: (If configured) the serial  number configured for the satellite, checked  against that presented by  the satellite during control protocol  authentication

    • Configured Satellite Links: One entry for each of  the configured satellite-fabric-links, headed by  the interface name.  The following information is present for each  configured link:

      • State: One of:              
        • Verifying: The configuration of this interface has not yet been accepted
        • Inactive: This configured link is currently inactive
        • Discovering: The discovery protocol is running over at least one link
        • Running discovery protocol: This is a physical satellite-fabric-link, and the discovery protocol is running
        • Configuring satellite: This is a physical satellite-fabric-link, and a satellite has been discovered and is currently being configured
        • Ready: This is a physical satellite-fabric-link, and the discovery protocol has completed
      • Ports: The configured remote ports on this configured link
      • Discovered Satellite Fabric Links: This  section is only present for redundant satellite-fabric-links. This lists the interfaces that are members of the configured link, and the per-link discovery state.

        • Running discovery protocol: The discovery protocol is running
        • Configuring satellite: A satellite has been discovered and is currently being configured
        • Ready: The discovery protocol has completed
        • Conflict:  If the configured link is not conflicted, the satellite discovered over the link is presenting data that contradicts that found over a different satellite-fabric-link.

     

     

    19. Discovery protocol status

    Screen Shot 2013-07-14 at 9.23.38 AM.png

     

     

     

    'show nv satellite protocol discovery'

    • Satellite ID: The satellite ID configured on this satellite-fabric-link
    • Status: The current discovery protocol status of the satellite. One of:            
      • Discovering: Probes are being sent; no satellite yet discovered
      • Conflicting: This link conflicts in some way with another link. Detailed reasons are:            
        • reason unknown: This configured link is in an unknown conflict state
        • remote ports overlap: The remote ports configuration on this satellite-fabric-link conflicts with that on another satellite-fabric-link
        • satellite not configured: The satellite this satellite-fabric-link is to be attached to isn't fully configured
        • Invalid ports: The remote-ports configuration on this satellite-fabric-link is invalid
        • multiple IDs: This discovered link is connected to a different satellite to another discovered link
        • multiple satellites: Different satellites are connected to member discovered links
        • different VRF: The configured satellite-fabric-links are not all in the same VRF
        • different IP: The configured satellite-fabric-links do not all have the same IPv4 address
        • waiting for VRF: The VRF information has not yet been notified to the GCO. Probably the link is missing IPv4 address configuration.
      • Stopped: The discovery protocol is stopped on this satellite-fabric-link. Most likely the link is down.
      • Running discovery protocol: The discovery protocol is running, but no satellite has responded.
      • Configuring satellite: A satellite has been discovered, and is being configured with an IPv4 address
      • Ready: The discovery protocol has completed
    • Remote Ports: The configured remote ports on this satellite-fabric-link
    • Host IPv4 Address: The IPv4 address used for the  host to communicate to this satellite.  Should match the IPv4 address on  all the satellite-fabric-links

    • Satellite IPv4 Address: The IPv4 address configured for the satellite

    For  Bundle-Ether satellite-fabric-links, there are then 0 or  more  'Discovered links' entries; for physical satellite-fabric-links,  the  same fields are present but just inline.

    • Vendor: The vendor string presented by the satellite it its ident packets
    • Remote ID: The satellite's ID for the interface that is connected to this satellite-fabric-link
    • Remote MAC address: The MAC address for the satellite interface connected to this satellite-fabric-link
    • Chassis MAC address: The chassis MAC address presented by the satellite in its ident packets

     

    20.

    21. Control protocol status

    Screen Shot 2013-07-14 at 9.23.44 AM.png

     

    'show nv satellite protocol control'

    • IP Address: The configured IP address for the satellite. This is the address the TCP session will be connected to
    • Status: SDACP Control Protocol status. One of the following:              
      • Connecting: The TCP session has yet to be established
      • Authenticating: The TCP session has been established, and  the control protocol is  checking the authentication information  provided by the Satellite

      • Checking version: The satellite has been successfully authenticated, and the host is checking it is running a compatible version of software
      • Connected: The SDACP control protocol session to the  satellite has been  successfully brought up, and the feature channels  can now be opened.

    For each channel, the following fields are present:

    • Channel Status: One of:           
      • Closed: The satellite has sent a close message on this channel, or the control protocol is not up
      • Opening: An open message has been sent to the satellite to open this channel
      • Opened: An opened response has been received from the satellite
      • Open: The feature channel is open
      • Open(In Resync - Awaiting Client Resync End) The Feature  Channel Owner (FCO) on the host has not finished sending  data to the  FCO on the Satellite.  If this is the state then typically  the triage  should continue on the host by the owner.  The owner of the Feature Channel should be contacted.

      • Open(In Resync - Awaiting Satellite Resync End) The FCO on  the Host is awaiting information from the FCO on the  Satellite.  If  this is the state then typically the triage should  continue on the  satellite.

    • Object Messages Sent: The number of object messages sent to the satellite on this channel
    • Non-Object Messages Sent: The number of non-object messages sent to the satellite on this channel
    • Object Messages Received: The number of object messages received from the satellite on this channel
    • Non-Object Messages Received: The number of non-object messages received from the satellite on this channel

     

     

    22. Satellite inventory

    Screen Shot 2013-07-14 at 9.23.51 AM.png

     

    Dataplane counters and forwarding verification

     

    Screen Shot 2013-07-14 at 9.20.36 AM.png

    Notes:

     

    • Physical port level (MAC level) counters retrieved every 30 seconds from each satellite (this includes SNMP)
     
    • “show interface GigabitEthernet 200/0/0/0” represents MAC stats retrieved from satellite
    1. TX, RX Packet drops @ ASR9K also added into these
    2. Packet drops at satellite ICL ports NOT included in “show interface GigabitEthernet”
    3. Packet drops at satellite ICL ports under debug CLI (“show nv satellite hardware …”)
     
    • Subinterface stats and interface accounting stats always from ASR9K uidb counters

     

    23. Common Issues

    • ''SAT9K_IMG_DOWNLOADER-3-TFTP_READ_FAIL: FTP download failure for 4502A1__.FPG with error code:-3'        
      • Check the MPP configuration
    • icpe_gco[1148]: %PKT_INFRA-ICPE_GCO-6-TRANSFER_DONE : Image transfer completed on Satellite 101
        • Here we are indicating the new image transferred to the satellite, and is what we expect to see, but sometimes this is not the case.
        • A few issues can cause this:

          • 1. MPP
          • 2. Using the progress keyword. Do not use the progress keyword
          • 3. TFTP homedir set with the default VRF, 'tftp vrf default ipv4 server homedir disk0:', (manual IP not auto-IP) and the directory is on disk0:. TFTP homedir should be removed.
          • 4. May fail on 901 due to space limitations. Delete non-nV images from the 901 flash and execute sqeeze flash: to free space
          • Note: Image transfer should take around 5 minutes

       

       

      Conflict Messages

      Examples:

      • Conflict, multiple IDs             
        • Check whether you have connected two interfaces to the same satellite box but given them different satellite IDs
      • Conflict, multiple satellites             
        • Check whether you have connected two interfaces to two different satellite boxes but given them the same satellite ID
      • Conflict, different VRF             
        • Check your VRF config - all satellite-fabric-link interfaces to a particular satellite must be in the same VRF
      • Conflict, waiting for VRF             
        • Check all IP config is present, or if any VRF config is present, check *all* the VRF config is present
      • Conflict, different IP             
        • Check  whether you have configured two satellite-fabric-links with different  IP addresses (you need to unnumber them to the same loopback interface).
      • Conflict, remote ports overlap           
        • Check whether you have configured overlapping remote port ranges on two or more satellite-fabric-links to the same satellite
      • Conflict, satellite not configured             
        • You need to enter the global satellite configuration
      • Conflict, invalid ports            
        • The specified port range is invalid
      • Conflict, satellite has no type configured             
        • You need to configure 'type asr9000v' in the global nv satellite configuration
      • Conflict, satellite has no ipv4 address             
        • You need to configure an IP address on the satellite
      • Conflict, satellite has a conflicting IPv4 address configured           
        • The IPv4 address configured on the satellite conflicts with another IP address in the system

       

      Access/ICL Bundles and stipulations

      BNG access over satellite is only qualified over bundle access and isn’t supported over bundle ICLs.

      BNG access over ASR9k host and NCS5k satellite specifically is in the process of official qualification in 6.1.x. Please check with PM for exact qualified release.

      Access bundles across satellites in an nV dual head solution are generally not recommended. The emphasis is not to bundle services across satellites in a dual head system as if they align to different hosts, the solution breaks without an explicit redundant path. An MCLAG over satellite access is a better solution there.

      Bundle access over bundle fabric / ICL require 5.3.2 and above on ASR9k. For NCS5k satellite, bundle ICL including bundle over bundle is supported from 6.0.1 and nV dual head topologies are planned to be supported only from 6.1.1

      MC-LAG over satellite access might be more convergence friendly and feature rich than nV dual head for BNG access from previous case studies. For non BNG access,  nV dual head and MC-LAG are both possible options with any combinations of physical or bundle access and fabric.

      In an MC-LAG with satellite access, the topology is just a regular MC-LAG system with the hosts syncing over ICCP but with satellite access as well. Note that the individual satellites aren’t dual homed/hosted here so there is no dual-host feature to sync over ICCP beyond just MC-LAG from CE.

      As a deployment recommendation, unless ICL links (between satellite and host) are more prone to failure over access, MC-LAG might be preferable over nV dual head solution. However, if ICL links have higher failure probability and the links going down can affect BW in bundle ICL cases, then MC-LAG may not switch over unless the whole link goes down or access goes down.

       

       

      http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.3/interfaces/configuration/guide/hc43satl.html

       

       

      Xander Thuijs CCIE#6775

      Principal Engineer, ASR9000    

       

      Sam Milstead

      Customer Support Engineer, IOS XR

      Comments
      Mark Pace Balzan
      Beginner


      Hi,

      I would like to setup a cascaded/subtended 9000v satellite and I understanding this is possible on 5.3.3

      I currently have a 9904/RSP440/MOD80 running 5.3.3 as a host to a 9000v2 'Satellite100' as per below.

      I would like to connect another 9000v, called 'Satellite200' linked to the existing 'Satellite100', rather than to the host


      A9K HOST---[Bundle100]---Satellite100---[Single GigE]---Satellite200


      I could not find any specific documentation for config of cascaded satellite, ie config for Satellite200 on the host 9k.

      Is is the same config as for Satellite100 used like below ?

      nv
      satellite 100
      type asr9000v2

      interface Bundle-Ether100
      description Satellite-100
      nv
      satellite-fabric-link satellite 100
      remote-ports GigabitEthernet 0/0/0-43

      nv
      satellite 200
      type asr9000v2

      interface gig100/0/0/0
      description Satellite-200
      nv
      satellite-fabric-link satellite 200
      remote-ports GigabitEthernet 0/0/0-43


      And for Satellite200, do I then see interfaces on the host 9k like for Satellite100, ie gig100/0/0/0-43 for Satellite100 and gig200/0/0/0-43 for Sateliite 200 ?

      thanks

      Mark

      ranbalag
      Cisco Employee

      Hi Mark,

      9000v supports ring topology and satellite getting connected to another satellite is part of that.

      Example from configuration Guide:

      interface GigabitEthernet0/1/0/0
      ipv4 point-to-point
      ipv4 unnumbered Loopback10
      nv
      satellite-fabric-link network
      redundancy
      iccp-group 2
      !
      satellite 500
      remote-ports GigabitEthernet 0/0/0-9
      !
      satellite 600
      remote-ports GigabitEthernet 0/0/0-9

      There are 2 changes that need to be modified in your interface configuration because of the limitations of the Simple Ring Topology.

      1. Simple Ring Topology does not support Bundle config over satellite fabric links (ICL), so yours can only on a physical interface on Host

      2. Satellite to Satellite connection can happen only through fabric links (ICL) and not on access links

      Request to refer the configuration guide heading "Simple Ring Satellite nV Topology"

      Thanks

      Ramesh A

      travisb04
      Community Member

      I have looked at the Simple Ring Satellite nV Topology stuff for release 5.3.3 which is what we are currently running in our network.  I can see how to add the first satellite but not how to specify and interface on that Satellite to connect to the next satellite in the cascade.  I could be reading it wrong as I am not very familiar with XR at all.

      The topology we want to run is:

      ASR9010 ---> Satellite 200 ----> Satellite 201 

      smilstea
      Cisco Employee

      so long as each satellite is running a high enough version of code (they should be if they are new) they will do this automatically. A probe will be sent out any ICL links on the first satellite trying to discover another satellite, and so on and so forth until the entire ring is discovered.

      Sam

      ranbalag
      Cisco Employee

      HI Travis,

      As Sam has mentioned the detection of satellite to satellite happens automatically as long as they are connected using default ICL ports. Explicit mention of the interface is not required.

      Thanks

      RameshA

      tradzwon
      Beginner

      Xander,

      With nV support being removed in 6.0.1 for the 901 & 920 can you share an information on how to convert these devices back to layer 2 and remove the nV license?

      Thanks 

      Tony 

      Jon Berres
      Enthusiast

      Hey Xander,

      I have a question regarding MPLS over NV satellite.From what we've found MPLS should be supported over an NV satellite. However, we're seeing failover problems. Do you know if there are any limitations that we should be aware of?

      We have a simple ring set with two ASr9000v homed to two ASR9010 hosts. L2/L3 interfaces seems to work great for failover. however we have noticed that if we have a PE router hanging off a satellite port with MPLS enabled we have to manually flap the port to restore l2vpn and l3vpn services.

      On the connected PE router we'll see in the xconnect an error to next hop:

      Last error: MPLS dataplane reported a fault to the nexthop

      Any suggestions or recommendations would be appreciated.

      Thanks,

      Jon

      xthuijs
      Cisco Employee

      hi jon,

      I would expect this to work, but the problem can be as much on the PE that is connected to the satellite or on the satellite host.

      what I think may be happening is that the PE off the satellite is having a label but after a ring failover, the other 9k host serving the ring is not in the know about the label and therefore chokes on this.

      so few things to look at are:

      - if the PE is directly connected to the 9k host is there a problem when there is a convergence (this is plain vanilla and should work under any condition).

      - if the PE is connecting to the satellite, and has proper forwarding is the next hop label changing or retained on 9k host failover?

      considering that the manual flap of the interface on the PE resolves the issue I am suspecting that the next hop label change is not done correctly on the PE OR that the 9khost is not advertising it properly.

      the investigation would need to focus on that.

      I will check around to see if there are known issues or known solutions for this also.

      it may be good to have a tac case for this also to help with the investigation in case we are running into a sw limitation (=bug) that might need to be addressed. one and other depending on your current version of course.

      cheers

      xander

      Jon Berres
      Enthusiast

      Hey Xander,

      Thanks for the quick reply. hope things are going well!

      The ASr9k host does not have any issues with directly connected PE routers (there are quite a few connected direct to 10G linecard ports).

      The PE through the satellite does appear to have a label mismatch however we were unable to collect all the needed to pin point problem during the maintenance due to customer traffic being impacted. We have seen this behavior on ASR1k and ASR901 PE routers so far. For next step we'll set this up in a lab and open a TAC case to investigate.

      Another detail we have seen this failover problem on hosts running 5.1.3 and 5.3.4. The ASr9000v satellites off 5.3.4 hosts weren't upgraded yet so not sure if that could be a factor (IOS: 532.101).

      Thanks again,

      Jon

      xthuijs
      Cisco Employee

      hi jon,

      i dont think the sat version is a factor on this one, since it sounds like (but confirm that with tac) that the label swap is not going nicely/smoothly. if that is the case we may be hitting a known limitation of the ring topology that Aleks whom I have been discussing this with was feeling to. If it is something else like a mac update or so, then there may be options.

      confirming with our dev and test too to see what the original design was meant to carry this scenario.

      cheers

      xander

      xthuijs
      Cisco Employee

      was discussing this with our satellite dev team earlier and this may work, but it wont be stateful. since the PE device will maintain igp peerings with host1 and separately with host 2 on failover.

      what may be the case is that your manual shut forces a igp peer down and re-establishment could that be the case?

      any case, the PE will need to tear down and reestablish its adj for this to work.

      having said that the satellite's purpose was merely as an edge device (for CE connectivity as a PE) and in this model you're sort of using it as a P device...

      xander

      tradzwon
      Beginner

      With nV support being removed in 6.0.1 for the 901 & 920 can you share any

      information on how to convert these devices back to layer 2 and remove the nV license?

      Thanks 

      Tony 

      Jon Berres
      Enthusiast

      Thanks for the feedback. That aligns with our expectations for using a port on the satellite for MPLS. It's understandable the IGP and labels would not be stateful and need to re-establish on failover. This would be fine if we just didn't have to flap the port to fix. When it goes into this mismatch state PWE traffic ends up be black holed which is worse than this path just being down hard.

      We're mocking this up in our lab and will open a TAC case to gather more details.

      Thanks,

      Jon

      wblackcenic
      Beginner

      I am trying to put a 100Mbps shaper on a 9000nV satellite sub-interface to account for the speed step from 10Gbps to 1Gbps down to 100Mbps.  The QoS configuration seems to apply fine and I'm trying to confirm that the QoS was actually applied by using the "show qos interface <int>" command.  However, when I run this command, the results I get back seem to indicate that the QoS policy wasn't actually applied to the interface.  Is there another way to confirm the QoS policies as applied to an 802.1Q sub-interface on an 9000nV satellite shelf?

      interface GigabitEthernet100/0/0/18.282
       bandwidth 100000
       service-policy output prioritize_sub1ge_sites
       ipv4 address <Removed>
       encapsulation dot1q 282
      !
      !
      policy-map prioritize_sub1ge_sites
       class packets_with_ip_precedence_5
        priority level 1
        set cos 5
        set dei 0
       !
       class packets_with_ip_precedence_6
        priority level 1
        set cos 6
        set dei 0
       !
       class class-default
        shape average 100 percent
       !
       end-policy-map
      !

      RP/0/RSP0/CPU0:<REMOVED>#show qos interface Gi100/0/0/18.282 output location 0/7/CPU0
      Thu Nov 10 10:04:29.865 PDT
      Interface: GigabitEthernet100_0_0_18.282 output
      Bandwidth configured: 10000000 kbps Bandwidth programed: 0 kbps
      ANCP user configured: 0 kbps ANCP programed in HW: 0 kbps
      Port Shaper programed in HW: 0 kbps
      Policy: prioritize_sub1ge_sites Total number of classes: 0
      ----------------------------------------------------------------------

      RP/0/RSP0/CPU0:<REMOVED>#show nv satellite status
      Thu Nov 10 10:13:34.597 PDT
      Satellite 100
      -------------
        Status: Connected (Stable)
        Type: asr9000v
        Displayed device name: Sat100
        IPv4 address: 10.0.0.2 (VRF: 9000nv_mgmt)
        Serial Number: CAT1840U2EE
        Remote version: Compatible (latest version)
          ROMMON: 127.0 (Latest)
          FPGA: 1.13 (Latest)
          IOS: 533.100 (Latest)
        Configured satellite fabric links:
          Bundle-Ether100
          ---------------
            Status: Satellite Ready
            Remote ports: GigabitEthernet0/0/0-43
            Discovered satellite fabric links:
              TenGigE0/7/0/0: Satellite Ready; No conflict
              TenGigE0/7/0/1: Satellite Ready; No conflict

      MEI FENG
      Beginner

      Hi Sam,

      Below is limit for 5.1.1 for simple-ring; is there improvement in 5.3.3 for these 4 items.

      1. Satellites may not be partitioned
      2. A satellite must be connected to two hosts
      3. A host may only be in one dual-home pairing
      4. Bundle ICLs cannot be used

      Thanks,

      Mei