Use Case: Configuring a Layer 3 VRRP Router on an IPMP Interface

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The following example shows the configuration of L3 VRRP router on IPMP interface. The configuration is based on the following scenario:

Figure 3 Layer 3 VRRP Router on an IPMP Interface

image:The figure shows an L3 VRRP network setup.

There is a virtual router V1.
In the virtual router V1, Router1 is the master and Router2 is the backup.
In Router1, the underlying interfaces net0 and net1 are configured into an IPMP group and all the underlying interfaces are assigned the test addresses.
Master router is configured on the active-active IPMP interface.
In Router2, the underlying interfaces net0, net1, and net2 are configured into an IPMP group. The interface net2 is configured as a standby interface.
Backup router is configured on the active-standby IPMP interface.

Install VRRP package.
```
# pkg install vrrp
```
Create an active-active IPMP interface in Router1.
```
# ipadm create-ipmp ipmp0
```

Create the underlying interfaces and add to the IPMP interface.

# ipadm create-ip net0
# ipadm create-ip net1
# ipadm add-ipmp -i net0 -i net1 ipmp0

Assign data addresses to the IPMP interface.

# ipadm create-addr -a 203.0.113.10/24 ipmp0
ipadm: ipmp0/v4
# ipadm create-addr -a 203.0.113.20/24 ipmp0
ipadm: ipmp0/v4a

Assign IP addresses to the underlying interfaces of the IPMP interface.

# ipadm create-addr -a 203.0.113.50/24 net0
ipadm: net0/v4
# ipadm create-addr -a 203.0.113.55/24 net1
ipadm: net1/v4

Configure the master router on Router1.

Create a VRRP router vrrp1 over ipmp0 with VRID as 1.

# vrrpadm create-router -T L3 -V 1 -A inet -I ipmp0 -P 203.0.113.1 \
-a 203.0.113.10 -p 150 vrrp1

Display the router information for vrrp1.

# vrrpadm show-router -x vrrp1
NAME    VRID TYPE IFNAME  AF    PRIO  ADV_INTV MODE  STATE   VNIC
vrrp1   1    L3   ipmp0   IPv4  150   1000     e-pa- MASTER  --

Configure an active-standby IPMP interface on Router2.
```
# ipadm create-ipmp ipmp1
```

Create the underlying interfaces and add to the IPMP interface.

# ipadm create-ip net0
# ipadm create-ip net1
# ipadm create-ip net2
# ipadm add-ipmp -i net0 -i net1 -i net2 ipmp1

Assign data addresses to the IPMP interface.

# ipadm create-addr -a 203.0.113.30/24 ipmp1
ipadm: ipmp1/v4
# ipadm create-addr -a 203.0.113.40/24 ipmp1
ipadm: ipmp1/v4a

Assign IP addresses to the underlying interfaces of the IPMP interface.

# ipadm create-addr -a 203.0.113.60/24 net0
ipadm: net0/v4
# ipadm create-addr -a 203.0.113.65/24 net1
ipadm: net1/v4
# ipadm create-addr -a 203.0.113.70/24 net2
ipadm: net2/v4

Configure the net2 interface as a standby interface.
```
# ipadm set-ifprop -p standby=on net2
```

Configure the backup router for Router2.

Create a backup VRRP router with a lower priority 100 over ipmp1 with VRID as 1.

# vrrpadm create-router -T L3 -V 1 -A inet -I ipmp1 -P 203.0.113.1 \
-a 203.0.113.30 -p 100 vrrp2

Display the router information.

# vrrpadm show-router -x
NAME    VRID TYPE IFNAME  AF    PRIO  ADV_INTV MODE  STATE   VNIC
vrrp2   1    L3   ipmp1   IPv4  100   1000     e-pa- MASTER  --

Modify the priority of vrrp2 to 200, which is greater than the priority of vrrp1 so that vrrp2 becomes the master router.
```
# vrrpadm disable-router vrrp2
# vrrpadm modify-router -p 200 vrrp2
# vrrpadm enable-router vrrp2
```

Display the router information for vrrp1.

# vrrpadm show-router -x vrrp1
NAME  VRID TYPE IFNAME  AF    PRIO  ADV_INTV MODE  STATE   VNIC
vrrp1 1    L3   ipmp0   IPv4  150   1000     e-pa- BACKUP  --

The state of the vrrp1 is changed to BACKUP.

Display the router information for vrrp2.

# vrrpadm show-router -x vrrp2
NAME  VRID TYPE IFNAME  AF    PRIO  ADV_INTV MODE  STATE   VNIC
vrrp2 1    L3   ipmp1   IPv4  200   1000     e-pa- MASTER  --

The state of the vrrp2 is changed to MASTER from BACKUP.