Friday, June 12, 2020

PIM config weirdness

Hey All!

This may be a real dumb question but I have been bashing my head against the wall all day trying to figure this out.

Im setting up PIM on our network so i can route multicast audio to another location but I just cant seem to get PIM to do the right stuff. I have a Cisco Nexus 7K router that is hooked up to a Cisco ASR 920, they are showing that they are neighbors but none of my several hundred multicast groups are showing up on the ASRs multicast routing table.

The audio is on VLAN300 with ip pim sparse-mode enabled on the vlan interface. I am routing that network via ibgp to the ASR over vlan 3001, with pim sparse-mode turned on for that vlan as well. I can add an igmp group to vlan 3001 and it shows on the ASR, but none of the groups on vlan 300 are showing up.

I've configured a static RP on the nexus and set the RP on the ASR to the IP of the RP on the nexus. Its like for some reason my PIM on VLAN 300 isnt sending info over. here are the configs for the 7K with the IP addresses changed. I know there are a few things that could be done better, but this is a test environment. Let me know if you need any other config bits.

ip pim rp-address 172.16.2.2 group-list 224.0.0.0/4 override vlan configuration 300 ip igmp snooping querier 172.160.20.1 ip igmp snooping querier-timeout 205 ip igmp snooping query-max-response-time 25 ip igmp snooping version 2 vlan configuration 3001 ip igmp snooping version 2 interface Vlan300 description Livewire no shutdown no ip redirects ip address 172.160.20.1/23 ip address 172.160.20.2/23 secondary ip pim sparse-mode ip igmp version 2 ip igmp report-link-local-groups interface Vlan3001 no shutdown ip address 172.160.254.1/29 ip pim sparse-mode router bgp 64515 router-id 1.1.1.1 log-neighbor-changes address-family ipv4 multicast network 172.160.20.0/23 address-family ipv4 unicast network 172.160.20.0/23 neighbor 172.16.254.2 remote-as 64515 address-family ipv4 unicast 


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