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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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: ...
kyob's user avatar
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4 votes
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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) ...
kyob's user avatar
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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. ...
fsociety's user avatar
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2 votes
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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 ...
Rnet's user avatar
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1 vote
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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....
Gianna's user avatar
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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? ...
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