User guide

Virtual Chassis Split Protection (VCSP) Configuring Virtual Chassis

page 13-14 OmniSwitch AOS Release 8 Switch Management Guide May 2014

Use the virtual-chassis split-protection guard-timer and the virtual-chassis split-protection admin-

state commands to configure the guard timer and enable/disable VCSP.

Automatic Recovery

If the VFL link recovers and the sub-VC reconnects to the active VC the sub-VC will automatically

reboot. The protection units will come up in the protection state; however they will now be part of the

active VC but their front panel ports will still be disabled. The master of the combined VC will detect that

there are new elements in the protection state. The master will wait for 60 seconds then bring one element

at a time from the protection state until all elements are active.

Once complete, the master will generate a trap indicating the VC has been recovered.

VC Split Example

1. VC split detected, sub-VC transitions to PROTECTION state.

2. Sub-VC front panel ports shutdown to avoid duplicate

addresses on network

3. PROTECTION PDUs sent by sub-VC to active-VC over helper linkagg.

Normal Opera-

tion

VCSP PDUs sent over helper linkagg and relayed by

helper switch.

VC Split

Sub-VC

Active-VC

Recovery

1. VFL link recovers, new elements detected by Master.

2. Manual Recovery - Administrator disables/enables VCSP to clear PROTECTION state.

3. Automatic Recovery - After guard-timer expiration, Master will bring up elements one at a time.

4. Once VC is functioning, Master will send trap indicating VC recovery.