Configuring VRRP-E load-balancing using short-path forwarding

VRRP-E traffic can be load-balanced using short-path forwarding on the backup devices.

Before configuring VRRP-E load-balancing, VRRP-E must be configured on all devices in the VRRP-E session.

Perform this task on all backup VRRP-E Layer 3 devices to allow load sharing within a VRRP extended group.

Use the configure terminal command to enter global configuration mode.
```
device# configure terminal
```
To globally enable VRRP-E, enter the router vrrp-extended command.
```
device(config)# router vrrp-extended
```
Enter the interface ve command with an associated VLAN number.
```
device(config-vrrpe-router)# interface ve 10
```
In this example, virtual Ethernet (ve) configuration mode is entered and the interface is assigned a VLAN number of 10.
Enter an IP address for the interface using the ip address command.
```
device(config-vif-10)# ip address 192.168.4.1/24
```
Enter the ip vrrp-extended vrid command with a number to assign a VRRP-E virtual router ID to the device.
```
device(config-vif-10)# ip vrrp-extended vrid 5
```
In this example, VRRP-E group configuration mode is entered.
Enter the backup command with a priority value to configure the device as a VRRP-E backup device.
```
device(config-vif-10-vrid-5)# backup priority 50
```
Enter the ip-address command with an IP address that is not used on any VRRP-E device interface to add a virtual IP address to the VRRP-E instance.
```
device(config-vif-10-vrid-5)# ip-address 192.168.4.254
```
Enter the short-path-forwarding command with a revert-priority value to configure the backup VRRP-E device as an alternate path with a specified priority.
```
device(config-vif-10-vrid-5)# short-path-forwarding revert-priority 50
```
When the backup device priority is higher than the configured revert-priority value, the backup router is able to perform short-path forwarding. If the backup priority is lower than the revert priority, short-path forwarding is disabled.
Enter the activate command to activate the VRRP-E instance.
```
device(config-vif-10-vrid-5)# activate
```

In the following example, short-path forwarding is configured on a backup VRRP-E device, and a revert priority threshold is configured. If the backup device priority falls below this threshold, short-path forwarding is disabled.

device# configure terminal
device(config)# router vrrp-extended
device(config-vrrpe-router)# interface ve 10
device(config-vif-10)# ip address 192.168.4.1/24
device(config-vif-10)# ip vrrp-extended vrid 5
device(config-vif-10-vrid-5)# backup priority 50
device(config-vif-10-vrid-5)# ip-address 192.168.4.254
device(config-vif-10-vrid-5)# short-path-forwarding revert-priority 50
device(config-vif-10-vrid-5)# activate

Contents

Configuring VRRP-E load-balancing using short-path forwarding