Interfaces on the same VLAN receive IP multicast's from other streamers on the same VLAN. This doesn't scale well and it is not a proper setup for each streamer to automatically receive one another's multicast.
Problem description detail:
Streamer 1 and 2 are both apart of vlan 967. Streamer 2 receives all multicast streams from streamer 1 without any requests. Conversely, streamer 1 receives all of streamer 2's multicasts! I need to prevent the streamers traffic from hitting one another.
Global:
no ip igmp snooping
ip multicast-routing
Source VLAN with backfeed problem:
interface Vlan967
description Modulus Encoders
ip address 10.1xx.yy.65 255.255.255.0
ip pim sparse-dense-mode (same result with just ip pim)
end
sho ip mrout count | i 239.20.0.2
Group: 239.1.7.2, Source count: 1, Packets forwarded: 1847630873, Packets received: 1847630873
If I remove PIM from the source vlan then the 6500 does not seem to recognize the multicast coming in from the streamers. The mroute doesn't show up but the traffic counters in the Ethernet interface continue to increment:
interface Vlan967
description Modulus Encoders
ip address 10.1xx.yy.65 255.255.255.0
end
sho ip mrout count | i 239.1.7.2
Group: 239.1.7.2, Source count: 0, Packets forwarded: 0, Packets received: 0
It would make sense to have IGMP snooping on for the streamer vlan but the Cisco does not seem to accept the command (after issuing the command it does not show up in the vlan interface configuration).
Other info about the network that is a requirement and working fine with the current setup:
Most of my interfaces require me to send the multicast's without any igmp requests. This is easy to do with the ip igmp static-group command such as in this destination VLAN:
interface Vlan973
description Spare-C7-Network
ip address 10.1xx.zz.65 255.255.255.0
ip pim dense-mode
ip igmp static-group 239.20.0.12
ip igmp static-group 239.10.0.66
ip igmp static-group 239.50.0.78
ip igmp static-group 239.70.3.0
ip igmp static-group 225.73.73.1
ip igmp static-group 226.73.73.2
ip igmp static-group 226.73.73.3
ip igmp static-group 226.73.73.4
Of course I also have periodic testing that requires me to make an IGMP request from another vlan and request multicast streams from the source vlan 967. For instance, if I'm plugged in as a client to a port apart of vlan 943 I can make an IGMP request and pull the multicast from 967 no prob.
