Brocade Multi-Service IronWare Switching Configuration Gui Uživatelský manuál stáhnout pdf (Strana 513)

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Multi-Service IronWare Switching Configuration Guide 483

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How ring breaks are detected and healed

Topology change notification for multicast traffic

Figure 111 shows a Layer 2 aggregation network which runs on Brocade MRP. In this scenario,

switch A acts as the MRP master and also the Internet Group Management Protocol (IGMP) querier.

When a link failure is detected on the port 1/1 of switch A, the port 1/2 of switch A will transition

from blocking state to forwarding state allowing the ring to re-converge in sub-second time. With

the transition of port 1/2 to forwarding state, the IGMP querier sends the IGMP reports through the

port 1/2 and the IGMP receivers will send the join message to the querier causing the multicast

traffic to re-converge immediately.

FIGURE 111 MRP ring with switch A as the querier

Figure 112 shows a Layer 2 aggregation network which runs on Brocade MRP. In this scenario,

switch A acts as the MRP master and switch B acts as the IGMP querier. When a link failure is

detected on the switch B, the port 1/2 of switch A will transition from blocking state to forwarding

state causing the multicast traffic to re-converge. The failover time of the multicast traffic is

determined by the IGMP query interval and the IGMP group membership time on the querier. These

timers can be set by ip igmp query-interval and ip igmp group-membership-time commands.

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