Questions tagged [igmp]
For questions about IGMP (Internet Group Management Protocol), a protocol used for communications between IPv4 hosts and multicast routers to establish and maintain host multicast group membership.
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questions with no upvoted or accepted answers
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ASR920 - port Te0/0/3-tefp1 is not a router port on Vlan 217
When I enabled debugging:
PIM#debug ip igmp snooping router
I get in logs:
Mar 30 15:58:36.275: IGMPSN: router: port Te0/0/3-tefp1 is not a router port on Vlan 217
Configuration for interfaces:
...
4
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443
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STB generate IGMP Leave without reason
In my network STB generates IGMP Leave (in STB logs "End of Stream") without any reason or there is something what I don't understand.
There is one exeption STB directly connected to PIM (ASR920) ...
4
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Regarding vPC Dual Active or Split Brain scenario
Consider the below topology:
Imagine that both the vPC peer keepalive link and vPC peer link have gone down.
I am trying to understand how will that lead to unpredictable traffic flows or loops.
...
2
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IGMP Snooping issue. probably
I have multicast hosts that keep leaving a group, only to join back up which results in loss of video feeds.
The network consists of a variety of Cisco 2960's and a Cisco 9300 w/ PIM Sparse mode set ...
1
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402
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Multicast traffic through Cisco3850
I have a test scenario and trying to pass multicast traffic through Cisco 3850 according to the following diagram:
![enter image description here
MC source:
several MC IPs such as 232.0.26.0, 232.0.27....
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Cisco SG300 switch identifies itself as duplicate IP address
We've enabled IGMP snooping on one of our VLANs. The configuration used is:
bridge multicast filtering
ip igmp snooping
ip igmp snooping vlan 1
ip igmp snooping vlan 1 querier
We're now seeing the ...
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IGMP backward compatibility
In RFC 2236 (IGMPv2), it is written
"An IGMPv2 host may be placed on a subnet where the Querier router has
not yet been upgraded to IGMPv2. The following requirements apply:
The IGMPv1 router ...
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Nonsense RFC 4604 forbids IGMP General Queries in SSM range but IGMP General Queries have no range and are send to 224.0.0.1, the all-systems address?
RFC 4604 Using Internet Group Management Protocol Version 3 (IGMPv3) and Multicast Listener Discovery Protocol Version 2 (MLDv2) for Source-Specific Multicast:
2.2.3. IGMPv1 Queries, IGMPv2 and MLDv1 ...
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Does multicast over tunnels (e.g., GRE) require IGMP/MLD?
When subscribing to a multicast group on a tunnel device such as a GRE tunnel, are you supposed to participate in IGMP/MLD over that tunnel in order to announce your membership in the multicast group? ...