Brocade FastIron Ethernet Switch Platform and Layer 2 Swit Manual de usuario Pagina 179

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Uplink switch
Uplink switch capability is supported on MCT VLANs. ICLs and CCEPs can be configured as uplink-
switch ports. Both cluster devices should have exactly the same uplink-switch port memberships
configured for the ICL and CCEPs.
Layer 2 multicast snooping over MCT
To support multicast snooping over MCT, the ICL port uses MDUP to synchronize the following
information between the cluster devices:
MAC-forward entries (mcache entries on MCT VLAN)
IGMP/MLD Join/Leave (control packets on MCT VLAN)
PIM-SM/PIM6-SM Join/Prune (control packets on MCT VLAN)
IGMP/MLD dynamic router ports 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 as active or passive. There is no restriction for cluster devices to run active-active or
passive-passive configurations.
The following commands show configuration commands for the VLAN level (IGMP and MLD), the global
level (IGMP/MLD), and for PIM-SM and PIM6-SM.
VLAN level (IGMP)
device(config)# vlan 100
device(config-vlan-100)# multicast active/passive
VLAN level (MLD)
device(config-vlan-100)# multicast6 active/passive
Global Level (IGMP/MLD)
device(config)# ip multicast active/passive
device(config)# ipv6 multicast active/passive
PIM-SM snooping (configured only on a VLAN and requires IGMP snooping to run in a passive mode):
device(config)# vlan 100
device(config-vlan-100)# multicast passive
device(config-vlan-100)# multicast pimsm-snooping
PIM6-SM snooping (configured only on a VLAN and requires MLD snooping to run in a passive mode):
device(config)# vlan 100
device(config-vlan-100)# multicast6 passive
device(config-vlan-100)# multicast6 pimsm-snooping
IGMP/MLD snooping behavior on MCT cluster devices
Local information is synchronized to the MCT peer device using CCP. The information includes
Mcache/FDB entry (on arrival of data traffic), joins/leaves, dynamic router ports, and PIM-SM
snooping joins/prunes.
Native control packets (joins/leaves) that are received are processed by protocol code and are
forwarded if necessary.
Uplink switch
FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 179
53-1003086-04
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