Configuration Guide User guide

FastIron Configuration Guide 851
53-1002494-02
Layer 2 behavior with MCT
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In a cluster, both cluster devices should have exactly same protocol VLAN membership with respect
to ICL and CCEP. ICL and CCEPs should be configured with same type of protocol/VLAN
membership, although there is no such restriction from the CLI.
Uplink switch
Uplink switch is supported on MCT VLANs. ICLs and CCEPs can be configured as uplink-switch
ports. Both cluster devices should have exactly same uplink-switch port memberships with respect
to the ICL and CCEPs.
Layer 2 multicast snooping over MCT
To support multicast snooping over MCT, the ICL port is used to synchronize the following
information between the cluster devices using MDUP:
• MAC - forward entries (mcache entries on MCT VLAN).
• IGMP/MLD Join/Leave (control packets on MCT VLAN).
• PIM-SM Join/Prune (control packets on MCT VLAN).
IGMP/MLD snooping
Snooping can be configured globally or at the VLAN level. Each cluster device in the MCT VLAN can
be configured either as active or passive. There is no restriction for cluster devices to run
active-active or passive-passive configuration.
The following commands show configuration commands for the VLAN level (IGMP), VLAN level
(MLD), global level (IGMP/MLD), and for PIM-SM.
VLAN level (IGMP)
Brocade(config)#vlan 100
Brocade(config-vlan-100)#multicast active/passive
VLAN level (MLD)
Brocade(config-vlan-100)# mld-snooping active/passive
Global Level (IGMP/MLD)
Brocade(config)#ip multicast active/passive
Brocade(config)#ipv6 mld-snooping active/passive
PIM-SM snooping (configured only on a VLAN and requires IGMP snooping to run in a passive
mode):
Brocade(config)#vlan 100
Brocade(config-vlan-100)#multicast passive
Brocade(config-vlan-100)# multicast pimsm-snooping