Configuration Guide User guide

1606 FastIron Configuration Guide
53-1002494-02
IP multicast protocols and IGMP snooping on the same device
Once IGMP Proxy is configured and the FastIron X Series router receives a query on an IGMP Proxy
interface, the router sends a report in response to the query before the IGMP maximum response
time expires.
Displaying IGMP Proxy traffic
Use the show ip igmp traffic command to see traffic for IGMP Proxy.
Syntax: show ip igmp traffic
Refer to “Displaying IGMP traffic status” on page 1604 to interpret the information in the output.
The fields in bold show information for IGMP Proxy.
IP multicast protocols and IGMP snooping
on the same device
The Brocade device supports global Layer 2 IP multicast traffic reduction (IGMP snooping) and
Layer 3 multicast routing (DVMRP or PIM-Sparse or PIM-Dense) together on the same device in the
full Layer 3 software image, as long as the Layer 2 feature configuration is at the VLAN level.
For Layer 2 multicast traffic reduction, IGMP snooping is performed independently within all VLANs
that have the feature configured. Layer 3 multicast routing is performed between the IP interfaces
that are configured for DVMRP, PIM-Sparse, or PIM-Dense. A Layer 3 interface could be a physical,
loopback, or VE port configured with an IP address.
If there are two sources for a single group, where one source sends traffic into a VLAN with IGMP
snooping enabled, while the other source sends traffic to a PIM enabled Layer 3 interface, a client
for the group in the same VLAN as the first source will only receive traffic from that source. It will
not receive traffic from the second source connected to the Layer 3 interface. Similarly, if there is
another IP interface with a Layer 3 client or PIM or DVMRP neighbor that requests traffic for the
same group, it will only receive traffic from the second source and not the first.
Brocade#show ip igmp traffic
Recv QryV2 QryV3 G-Qry GSQry MbrV2 MbrV3 Leave IsIN IsEX ToIN ToEX ALLO BLK
e1/14 0 0 0 0 27251 0 12 0 27251 12 0 0 0
v10 250 0 0 0 244 0 0 0 244 0 0 0 0
Send QryV1 QryV2 QryV3 G-Qry GSQry MbrV1 Mbrv2 Leave
e1/14 0 1365 0 48 0 0 0 0
v10 0 1 0 0 0 0 25602 1