Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 627)

Multi-Service IronWare Switching Configuration Guide 597
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About Multi-Chassis Trunk (MCT)
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FIGURE 175 MCT Active-Passive topology
Figure 175 is an example of an MCT Active-Passive topology. PE1 and PE2 are nodes of cluster,
MCT1. PE3 and PE4 are nodes of another MCT cluster, MCT2.
• CE1 and CE2 are clients of MCT1 and MCT2 respectively.
• Data traffic will be forwarded on the Active-Active links between the PEs.
• Data traffic will be forwarded on the Active links from the CE to PE.
Multicast snooping over MCT
To support multicast snooping over MCT for Brocade devices, the ICL port is used to synchronize
the following information between the cluster switches using MDUP:
• MAC - forward entries (mcache entries on MCT VLAN).
• IGMPor MLD Join or Leave (control packets on MCT VLAN).
• PIM-SM Join or Prune (control packets on MCT VLAN).
IGMP or MLD snooping
Each cluster switch in the MCT VLAN can be configured either as active or passive. There is no
restriction for cluster switches to run Active-Active or Passive-Passive configuration.
Implementation of MCT is exactly the same for both IGMP or MLD Snooping, so all further details
are explained only with reference to IGMP.