Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 609)

Multi-Service IronWare Switching Configuration Guide 579
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VSRP and Foundry MRP signaling
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To ensure that Foundry MRP is informed of the topology change and to achieve convergence
rapidly, a signaling process for the interaction between VSRP and Foundry MRP. When a VSRP node
fails, a new VSRP master is selected. The new VSRP master finds all Foundry MRP instances
impacted by the failover. Then each Foundry MRP instance does the following:
• The Foundry MRP node sends out a Foundry MRP PDU with the mac-flush flag set three times
on the Foundry MRP ring.
• The Foundry MRP node that receives this Foundry MRP PDU empties all the MAC address
entries from its interfaces that participate on the Foundry MRP ring.
• The Foundry MRP node then forwards the Foundry MRP PDU with the mac-flush flag set to the
next Foundry MRP node that is in forwarding state.
The process continues until the Master Foundry MRP node’s secondary (blocking) interface blocks
the packet. Once the MAC address entries have been flushed, the MAC table can be rebuilt for the
new path from the host to the VSRP-linked device (
Figure 170 ).