Configuration Notes And Feature Limitations - Dell PowerConnect B-FCXs Configuration Manual

Powerconnect b-series fcx

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Virtual Switch Redundancy Protocol (VSRP)

In this example, two Dell PowerConnect devices are configured as redundant paths for VRID 1. On

each of the devices, 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 Dell PowerConnect devices becomes the

Master for the VRID and sets the state of all the VLAN 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 Dell PowerConnect devices can use the redundant paths provided by the VSRP devices. In

this example, three Dell PowerConnect devices use the redundant paths. A Dell PowerConnect

device that is not itself configured for VSRP but is connected to a Dell PowerConnect device that is

configured for VSRP, is VSRP aware. In this example, the three Dell PowerConnect devices

connected to the VSRP devices are VSRP aware. A Dell PowerConnect 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 Dell PowerConnect devices connected

to the VSRP devices has a separate link to each of the VSRP devices.

Configuration notes and feature limitations

VSRP mesh – redundant paths for Layer 2 and Layer 3 traffic

Hello packets

VSRP and 802.1Q-n-Q tagging are not supported together on the same device.

VSRP and Super Aggregated VLANs are not supported together on the same device.

When VSRP or VSRP-aware is configured on a VLAN, the VLAN will support IGMP snooping

version 2 only. IGMP version 3 will not be supported on the VLAN.

optional link

PowerConnect B-Series FCX Configuration Guide

53-1002266-01