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VPC not successful over 2 N5k

mangesh.kamble
Level 1
Level 1

Hello,

We are trying to configure a pair of Nexus 5K's and setup vpc  peer link between them.  When I issue the show vpc brief command,

WE-SSIPL-NX1# show vpc brief
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1  
Peer status                     : peer link is down            
                                  (peer-keepalive not operational,         
                                  peer never alive)                        
vPC keep-alive status           : Suspended (Destination IP not reachable)
Configuration consistency status: failed 
Configuration consistency reason: Consistency Check Not Performed
vPC role                        : none established             
Number of vPCs configured       : 0  
Peer Gateway                    : Disabled
Dual-active excluded VLANs      : -

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po20   up     -                                                      

WE-SSIPL-NX1# show port-channel summary
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
10    Po10(SU)    Eth      LACP      Eth101/1/27(P)  Eth101/1/28(P) 
20    Po20(SU)    Eth      LACP      Eth1/9(P)    Eth1/10(P)  
51    Po51(SU)    Eth      NONE      Eth1/19(P)   Eth1/20(P)  
101   Po101(SU)   Eth      NONE      Eth1/1(P)    Eth1/2(P)   
102   Po102(SD)   Eth      NONE      Eth1/3(D)    Eth1/4(D)   
103   Po103(SD)   Eth      NONE      Eth1/5(D)    Eth1/6(D)   
104   Po104(SD)   Eth      NONE      Eth1/7(D)    Eth1/8(D)   
105   Po105(SD)   Eth      NONE      --

WE-SSIPL-NX1# show version
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2010, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software are covered under the GNU Public
License. A copy of the license is available at
http://www.gnu.org/licenses/gpl.html.

Software
  BIOS:      version 1.2.0
  loader:    version N/A
  kickstart: version 4.2(1)N1(1)
  system:    version 4.2(1)N1(1)
  power-seq: version v1.2
  BIOS compile time:       06/19/08
  kickstart image file is: bootflash:/n5000-uk9-kickstart.4.2.1.N1.1.bin
  kickstart compile time:  4/29/2010 19:00:00 [04/30/2010 08:08:04]
  system image file is:    bootflash:/n5000-uk9.4.2.1.N1.1.bin
  system compile time:     4/29/2010 19:00:00 [04/30/2010 09:21:47]


Hardware
  cisco Nexus5010 Chassis ("20x10GE/Supervisor")
  Intel(R) Celeron(R) M CPU    with 2074284 kB of memory.
  Processor Board ID JAF1422DRAC

  Device name: WE-SSIPL-NX1
  bootflash:    1003520 kB

Kernel uptime is 9 day(s), 14 hour(s), 28 minute(s), 32 second(s)

Last reset
  Reason: Unknown
  System version: 4.2(1)N1(1)
  Service:

plugin
  Core Plugin, Ethernet Plugin

the  peer-keepalive link is not working fine and the vpc peer relationship isn't  coming active.  I'm following the Cisco N5K config guide and have both  sides of the 5K's config'd the same (except for the peer keepalive IP  addresses) but can't seem to bring the vpc peer link active.  Are there  any vpc setup guides that anybody has found helpful?  Thanks in advance  for any suggestions,

I am having 2 peer-links and 1 peer-keepalive directly connecting to my other N5k.

Mangesh...

7 Replies 7

Dale Miller
Cisco Employee
Cisco Employee

The VPC peer link was suspended because the destination peer keep-alive is not reachable. This is from your output provided:

WE-SSIPL-NX1# show vpc brief
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1  
Peer status                     : peer link is down            
                                  (peer-keepalive not operational,         
                                  peer never alive)                        
vPC keep-alive status           : Suspended (Destination IP not reachable)
Configuration consistency status: failed 
Configuration consistency reason: Consistency Check Not Performed
vPC role                        : none established             
Number of vPCs configured       : 0  
Peer Gateway                    : Disabled
Dual-active excluded VLANs      : -

You will need to get the keep-alive working for VPC to come up. The vPC peer-keepalive can be carried either in the management or default VRF on the Cisco Nexus 5000 Series switch. When you configure the switches to use the management VRF, the  source and destination for the keepalive messages are the mgmt 0  interface IP addresses. When you configure the switches to use the  default VRF, an SVI must be created to act as the source and destination  addresses for the vPC peer-keepalive messages. Ensure that both the  source and destination IP addresses used for the peer-keepalive messages  are unique in your network and these IP addresses are reachable from  the VRF associated with the vPC peer-keepalive link.

If you require further assistance please provide show run vpc from each switch to review the configurations.

Thanks,

Dale

I have the same problem,,

Can u help in that plz,,

thanks 

---------------------

vPC domain id : 100
Peer status : peer link is down
vPC keep-alive status : Suspended (Destination IP not reachable)
Configuration consistency status : failed
Per-vlan consistency status : success
Configuration inconsistency reason: Consistency Check Not Performed
Type-2 inconsistency reason : Consistency Check Not Performed
vPC role : none established
Number of vPCs configured : 0
Peer Gateway : Disabled
Dual-active excluded VLANs : -
Graceful Consistency Check : Disabled (due to peer configuration)
Auto-recovery status : Disabled
Delay-restore status : Timer is off.(timeout = 30s)
Delay-restore SVI status : Timer is off.(timeout = 10s)

vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po100 up -

----------------------------

100   Po100(SU)   Eth      LACP      Eth1/47(P)   Eth1/48(P)   

Hello,

vPC keep-alive status : Suspended (Destination IP not reachable),

Which interface did you use for keep alive? Can you ping the destination peer through keep-alive link?

Masoud

Hello too Masoud,

N9K-1:

vrf context AYTB
vrf context management
vpc domain 100
role priority 4000
peer-keepalive destination 10.1.1.65 source 10.1.1.66 vrf AYTB


interface port-channel100
switchport
switchport mode trunk
spanning-tree port type network
vpc peer-link


interface Ethernet1/46
description *** VRF link ***
vrf member AYTB
ip address 10.1.1.65/24
no shutdown

interface Ethernet1/47
switchport
switchport mode trunk
channel-group 100 mode active
no shutdown

interface Ethernet1/48
switchport
switchport mode trunk
channel-group 100 mode active
no shutdown

-----------------------------------

N9K-2:


vrf context AYTB
vrf context management
vpc domain 100
role priority 4000
peer-keepalive destination 10.1.1.65 source 10.1.1.66 vrf AYTB


interface port-channel100
switchport
switchport mode trunk
spanning-tree port type network
vpc peer-link

interface Ethernet1/46
description ** VRF link ***
vrf member AYTB
ip address 10.1.1.66/24
no shutdown

interface Ethernet1/47
switchport
switchport mode trunk
channel-group 100 mode active
no shutdown

interface Ethernet1/48
switchport
switchport mode trunk
channel-group 100 mode active
no shutdown

I will go to the DC to cheq the PING again..

Its working now,,,,

there was wrong IP..

many thanks ya Masoud.

I am glad your problem was solved.

jkilleda
Level 3
Level 3

Hello Mangesh,

 

VPC not successful over 2 N5k

Usually a vPC peer-link is down either due to a link failure or when the peer switch is completely down

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