Brocade BigIron RX Series Configuration Guide - Manual (Page 508)

430 BigIron RX Series Configuration Guide
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Overview of Virtual Switch Redundancy Protocol (VSRP)
15
FIGURE 75 VSRP mesh – redundant paths for Layer 2 and Layer 3 traffic
In this example, two devices are configured as redundant paths for VRID 1. On each device, a
Virtual Router ID (VRID) is configured on a port-based VLAN. Since VSRP is primarily a Layer 2
redundancy protocol, the VRID applies to the entire VLAN. However, you can selectively remove
individual ports from the VRID if needed.
Following Master election (described below), one of the Brocade devices becomes the Master for
the VRID and sets the state of all the VLAN’s ports to Forwarding. The other device is a Backup and
sets all the ports in its VRID VLAN to Blocking.
If a failover occurs, the Backup becomes the new Master and changes all its VRID ports to the
Forwarding state.
Other Brocade devices can use the redundant paths provided by the VSRP devices. In this example,
three Brocade devices use the redundant paths. A Brocade device that is not itself configured for
VSRP but is connected to a Brocade device that is configured for VSRP, is VSRP aware. In this
example, the three Brocade devices connected to the VSRP devices are VSRP aware. A Brocade
device that is VSRP aware can failover its link to the new Master in sub-second time, by changing
the MAC address associated with the redundant path.
When you configure VSRP, make sure each of the non-VSRP Brocade devices connected to the
VSRP devices has a separate link to each of the VSRP devices.
When using the BigIron RX in conjunction with a FastIron Edge Switch, FastIron GS Series Switch,
FastIron LS Series Switch, FastIron Edge Switch X Series Switch, or the FastIron Edge Switch X
Series Switch as the VSRP-aware switches, the vsrp-aware vrid <num> tc-vlan-flush command is
required to be configured on the non-BigIron RX devices. Refer to the FastIron Configuration Guide
for additional information.
VSRP
Master
VSRP
Backup
optional link
VSRP
Aware
VSRP
Aware
VSRP
Aware
Hello packets
F F F B B B