Hi all
I ran into a problem with VIP for high availability on Blue Coat ProxySG. Both ProxySG send multicast packets
to advise the other ProxySG that it is up and the priority is contained in the multicast packet, along with the IP address of the VIP and so on.
This worked fine with Catalyst switches. Unfortunately it does not work over the newly installed Nexus switches.
There is no Vlan interface on the switches. The Vlan is only trunked through.
I found a hint that IGMP Querier could solve this issue. After configuration of IGMP Querier end acitvating Multicast on ProxySG
a IGMP group is built and all seems fine.
In a trace I can see IGMP Queries leaving the Querier but no answer from both ProxySGs.
After 6 minutes (3 times Querier Interval) the group disappears and both Boxes become active.
The topology looks like this:
Bluecoat1 -----N2k------2*N5k-----2*N7k-------Inter Datacenter Link-------2*N7k------2*N5k-----N2k-----Bluecoat2
vPC vPC vPC vPC
On both N7k in the left Datacenter is a Querier configured:
vlan configuration 85
ip igmp snooping querier 10.101.22.7
# sh ip igmp snoop querier
Vlan IP Address Version Expires Port
85 10.101.22.7 v3 00:01:22 Switch querier
I wonder if an additional setting has to be made. Could it be that the Bluecoats ignore IGMPv3?
I would be very grateful for a hint.
Many Thanks!
Regards,
Urs
