Users Guide
Setting up Dual Homing
You can setup dual homing when:
1 There are two systems (CBs) and both have PEs connected to them. You can physically connect the CBs and then congure them as
VLT peers to convert the system into dual homing setup. Refer to Systems with Port Extender.
2 There is a CB connected to PE and a standalone CB. You can physically connect the CBs and then congure them as VLT peers. Then
physically connect the uplink ports of the PE to each of the VLT peers. The system starts functioning as a dual homing setup. Refer to
Standalone System.
3 There are two standalone CBs not connected to PEs. You can physically connect the CBs and then congure them as VLT peers.
Then physically connect the uplink ports of the PE to the VLT peers. The system starts functioning as a dual homing setup. Refer to
Systems without Port Extender.
NOTE: PE up-time reects the duration of time for which the PE is up. However, during an ICL ap or reload scenario, PE up-
time is not synced between the VLT peers. As a result, both the VLT nodes run their own timers after an ICL ap or reload
occurs.
Systems with Port Extender
The following diagram illustrates PE 1 connected to System A and PE 2 connected to System B.
Figure 108. Systems with Port Extender — Before setting up Dual Homing
You can connect System A and System B and congure them as VLT peers as follows:
1 Ensure that PE IDs of PE 1 and PE 2 are dierent. The IDs should be unique and cannot overlap during the conguration.
2 Ensure that System A and System B are upgraded to OS 9.10(0.) or later.
3 Enter VLT-domain conguration mode for a specied VLT domain. Ensure that both the systems are congured with the same VLT
domain ID.
CONFIGURATION mode
vlt domain domain-id
The range of domain IDs is from 1 to 1000.
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Port Extenders (PEs)