Multicast - Static IGMP not working on Cisco 3548 (Nexus)

lmqtechnology · ‎05-18-2022

We have a 3rd party static IGMP feed coming in to a L3 interface on a Cisco Nexus 3548. We have another device on interface Eth1/47 (VLAN2) running tcpdump. The device on Eth1/47 is not receiving the Mcast messages. We know we are receiving the feed as it shows up on a packet capture.

interface Ethernet1/2
no switchport
ip address 10.9.208.26/30
ip pim sparse-mode
no shutdown

interface Vlan2
description temp poc
no shutdown
ip address 192.168.2.1/24
ip pim sparse-mode
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx
ip igmp join-group xxx.xxx.xxx.xxx

(*, xxx.xxx.xxx.xxx/32), uptime: 03:39:31, ip pim igmp
Incoming interface: Ethernet1/2, RPF nbr: 10.9.208.25
Outgoing interface list: (count: 1)
Vlan2, uptime: 00:25:35, igmp

paul driver · ‎05-18-2022

Hello

Do you have RP specified?

sh ip pim rp
sh ip pim rp mapping
sh ip pim neighbor
sh ip pim interface

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Kind Regards
Paul

lmqtechnology · ‎05-18-2022

Yes,

ip pim rp-address 10.9.208.25 prefix-list testing