# Grouping ICR Subscribers Based on VLAN IDs

You can configure ICR subscribers based on VLAN IDs. When you configure a VLAN list or VLAN range, you can include any or all of the following keywords:

- Use the control-interface keyword to control the state of the corresponding subinterfaces (up/AdminDown) based on the state of the partition (master or backup). If the subinterfaces are part of the backup partition, the router changes the state of all the subinterfaces to AdminDown.
- Use the use-default-mac keyword to enable the subinterfaces to use the default MAC address instead of the VRRP MAC address. By default, subinterfaces use the virtual MAC address of the associated VRRP instance.
- Use the advertise-mac keyword to enable the subinterfaces to transmit gratuitous ARP (GARP) advertisements when the ICR partition moves from the backup state to the master state.

To group ICR subscribers based on VLAN IDs:

1. Specify VLAN as the grouping type.
   host1(config-if)#ip vrrp 1 icr-partition group vlan

   The default grouping option is S-VLAN. If you do not explicitly specify the grouping option, the subscribers are grouped based on S-VLAN.

2. Add VLAN subinterfaces to the ICR partition by doing either of the following:
   - Specify the VLAN IDs individually by using the vlan-list keyword to add a group of random VLAN IDs. In the following example, you add VLAN subinterfaces by specifying each VLAN ID individually because the IDs are in random order.
     host1(config-if)#ip vrrp 1 icr-partition vlan-list 10 21 62 control-interface advertise-mac
   - Specify the starting ID and ending ID of the range of VLAN subinterfaces. In the following example, you specify the first and the last ID of the range because the IDs are in sequential order.
     host1(config-if)#ip vrrp 1 icr-partition vlan-range 10 40 control-interface advertise-mac
3. (Optional) Configure additional VLAN subinterfaces by completing Step 2 using unique numbering.

#### Related Documentation

- Grouping ICR Subscribers Based on S-VLAN IDs
- Monitoring the Configuration of an ICR Partition Attached to an Interface
- ip vrrp icr-partition group
- ip vrrp icr-partition vlan-list
- ip vrrp icr-partition vlan-range