Configuration Guide User guide

834 FastIron Configuration Guide
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Multi-Chassis Trunking Overview
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Port failure on the cluster device
1. A CCEP on the cluster device that received the unicast or BUM traffic fails.
2. The traffic is automatically redirected to the other MCT cluster device over the ICL and on to its
destinations through CCEPs.
Refer to Figure 100.
FIGURE 100 MCT data flow with port failure
MCT and VLANs
MCT relies on the following VLAN types:
• Session VLAN: Provides the control channel for CCP. Brocade recommends keeping only ICL
ports in the session VLAN. A virtual interface is required to be configured on the session VLAN
for the router image.
• Keep-alive VLAN: Provides a backup control path if the ICL goes down (optional, but strongly
recommended).
• MCT VLAN: Serves the customer data traffic. An ICL must belong to every MCT VLAN to provide
a data path between two cluster devices. When an ICL is added to a VLAN, it becomes an MCT
VLAN.
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