09-27-2013 02:42 AM
Hello,
we have a 2 server cluster and we need to establish a multicast comunication between the servers.
The servers are located in 2 diferent DataCenters on Nexus5000 with NX-OS v 5.0 and there is a fiber connection between de Nexus.
Servers are virtual Hyper-V servers with Windows 2008 R2 Standard and they have several NICs with diferent vlans.
We are trying tu run Oracle Coherence.
Servers are in the same vlans (Service, Backup, etc) but the multicast connection doesn´t work.
When the 2 servers are in the same DataCenter there is no problem, but when we have moved one server in another DataCenter the problem started.
What can I do?
Thank you very much, Jonan.
09-28-2013 01:26 PM
IGMP snooping is probably enabled by default and you need to add an IGMP querier so that the inter-switch link is added to the snooped multicast ports.
09-30-2013 04:49 AM
Hi,
have you configured any VRF on your data center????
10-01-2013 03:38 AM
I have foun this technote fore Catalyst, I´m trying to find something similar for Nexus because some commands don´t work.
http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008059a9df.shtml
I think we have only the default vrf configuration:
VRF-Name VRF-ID State Reason
default 1 Up --
management 2 Up --
Do we need VRF to enable multicast?
IGMP snooping is enabled, and there isn't any querier:
IGMP Snooping information for vlan 33
IGMP snooping enabled
Optimised Multicast Flood (OMF) disabled
IGMP querier none
Switch-querier disabled
IGMPv3 Explicit tracking enabled
IGMPv2 Fast leave disabled
IGMPv1/v2 Report suppression enabled
IGMPv3 Report suppression disabled
Link Local Groups suppression enabled
Router port detection using PIM Hellos, IGMP Queries
Number of router-ports: 1
Number of groups: 0
VLAN vPC function enabled
Active ports:
Po10 Po11 Po12 Po13
Po20 Po21 Po22 Po23
Po24 Po25
But, How can I configure a querier?
ip igmp snooping ?
event-history Configure event-history buffers
link-local-groups-suppression Configures Global link-local groups suppression
mrouter Configures static multicast router interface
optimise-multicast-flood Configures Optimized Multicast Flood (OMF) on all VLANs
report-suppression Configures Global IGMPv1/IGMPv2 Report Suppression
v3-report-suppression Configures Global IGMPv3 Report Suppression and Proxy Reporting
Thanks.
10-21-2013 01:19 PM
11-04-2013 02:52 PM
Hi, is it solved?
11-07-2013 07:33 AM
Not yet, I have tried to use a multicast router, but I can´t enable pim feature because w haven´t got the license.
feature pim
No available license - LAN_BASE_SERVICES_PKG error Feature does not have an installed license
I have asked the license but they don´t provide me yet.
I have tried also to configure IGMP snooping in the VLAN:
NEXUS1(config)# ip igmp snooping
Warning: IGMP Snooping should be globally enabled on peer VPC switch as well.
NEXUS1(config)# ip igmp snooping mrouter vpc-peer-link
Warning: IGMP Snooping mrouter vpc-peer-link should be globally enabled on peer VPC switch as well.
NEXUS1(config)# vlan 99
NEXUS1(config-vlan)# ip igmp snooping
Warning: IGMP Snooping should be enabled on peer VPC switch
Warning: IGMP Snooping should be enabled on peer VPC switch
NEXUS1(config-vlan)# ip igmp snooping explicit-tracking
NEXUS1(config-vlan)# ip igmp snooping fast-leave
NEXUS1(config-vlan)# ip igmp snooping last-member-query-interval 3
Warning: IGMP Snooping should be enabled on peer VPC switch
NEXUS1(config-vlan)# ip igmp snooping querier 10.0.206.240
NEXUS1(config-vlan)# ip igmp snooping report-suppression
NEXUS1(config-vlan)# ip igmp snooping mrouter interface Po11
NEXUS1(config-vlan)# ip igmp snooping static-group 228.8.8.8 interface Po11
NEXUS1(config-vlan)# ip igmp snooping link-local-groups-suppression
NEXUS1(config-vlan)# ip igmp snooping v3-report-suppression
NEXUS1(config-vlan)# no ip igmp snooping mrouter vpc-peer-link
Warning: IGMP Snooping mrouter vpc-peer-link should be globally disabled on peer VPC switch as well.
NEXUS1(config)# end
And I will try next week to configure vpc-peer-link in the Port-Channel between Nexus. The actual configuration is:
interface port-channel20
description NEXUS2 Eth1/8-9
switchport mode trunk
vpc 20
And I will try to configure vpc-peer-link
interface port-channel20
description Peer-Link NEXUS2 Eth1/8-9
switchport mode trunk
vpc peer-link
spanning-tree port type network
11-07-2013 12:23 PM
Great. You should be done. PIM is not necessary if you have a working querier.
11-12-2013 01:24 AM
Hello again,
I have tried to enable vpc-peer-link between Data Centers but I can´t do it.
I have read in this document that the vpc-peer-link can establish only between 2 switches and we have already do it.
http://docwiki.cisco.com/wiki/Nexus_5000_vPC_Design_Best_Practices
We have already established it in both Data Centers because there are 2 Nexus in each Data Center. So I think we must get the PIM license and enable PIM to route the multicast traffic.
11-12-2013 02:00 AM
Hi Skrowocsic
Have/had a similar problem - we are running MS NLB in Multicast IGMP mode and have 2 x 2 set of nexus 5k as access-switches. I have defined all the ports in between the switches as mrouter's to forward the traffic in between the L2 switches:
ex - vlan 2001 where I have port-channel5 which is a uplink to a L3 switch and port-channel 16 which is my DCI (vpc on dark-fiber with 50km in between the switches)
vlan 2001
ip igmp snooping mrouter interface port-channel5
ip igmp snooping mrouter interface port-channel16
seems to work now - the vm's running MS NLB announce their multicast groups and join them also in between the switches
best regards /Ti
11-14-2013 04:25 AM
Hello,
I suspect that the problem is located in the software.
Do you know how can I check if IGMP snooping is correctly configured?
In spite of it all, I have open an enquiry to the support company.
Thank you very much.
11-28-2013 12:09 AM
Hi again
Sorry for the long delay - no I am not that familiar with all the fancy options here but found some simple commands which works for me - here like the displaying the groups which has been joined by the vm's and network interfaces allocated for the traffic:
SW5020-01# sh ip igmp snooping groups vl 21
Type: S - Static, D - Dynamic, R - Router port
Vlan Group Address Ver Type Port list
21 */* - R Po10 Po16 Po5
21 239.255.149.19 v1 D Eth1/14 Eth1/19 Eth1/32
21 239.255.149.24 v1 D Eth1/12 Eth1/15 Eth1/16
Eth1/26 Eth1/31
21 239.255.255.250 v2 D Po15 Eth1/11 Eth1/28
Eth1/29
SW5020-01#
those v1 groups are ms windows 2k8 serveres running nlb for rdp. This looks correctly - the two groups ending on .19 & .49 are groups created by the NLB clusters (these groups reflect the ip adresses of the NLB cluster)
bestr egards /ti
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