Configuring Layer-3 Mobility
To configure a mobility domain, you have to specify the list of all Instant networks that form the mobility domain. To allow clients to roam seamlessly among all the Instant APs, specify the virtual controller IP for each foreign subnet Subnet is the logical division of an IP network.. You may include the local Instant or virtual controller IP address, so that the same configuration can be used across all Instant networks in the mobility domain.
It is recommended that you configure all client subnets Subnet is the logical division of an IP network. in the mobility domain.
When the client subnets Subnet is the logical division of an IP network. are configured, note the following scenarios:
- If a client is from a local subnet Subnet is the logical division of an IP network., it is identified as a local client. When a local client starts using the IP address, Layer-3 roaming is terminated.
- If the client is from a foreign subnet Subnet is the logical division of an IP network., it is identified as a foreign client. When a foreign client starts using the IP address, Layer-3 roaming is set up.
Home Agent Load Balancing
Home Agent Load Balancing is required in large networks where multiple tunnels might terminate on a single border or lobby Instant AP and overload it. When load balancing is enabled, the virtual controller assigns the home Instant AP for roamed clients by applying a round robin policy. With this policy, the load for the Instant APs acting as Home Agents for roamed clients is uniformly distributed across the Instant AP cluster.
Configuring a Mobility Domain for Instant
The following procedure describes how to configure Layer-3 mobility domain by using the WebUI:
- Go to the > page.
- Click the .
- Expand .
- Toggle the switch to enable. By default, home agent load balancing is disabled.
- Click controller that is part of the mobility domain, and click . in the section. In the New IP address field, add the IP address of a virtual
- Repeat Step 5, to add the IP addresses of all virtual controllers that form the Layer-3 mobility domain.
- Click
- subnet Subnet is the logical division of an IP network. in the text box. —Enter the client
- —Enter the mask in the text box.
- VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. ID of the home network in the text box. —Enter the
- controller IP address for this subnet Subnet is the logical division of an IP network. in the text box. —Enter the home virtual
in the section and specify the following: - Click .
- Click .
The following CLI Command-Line Interface. A console interface with a command line shell that allows users to execute text input as commands and convert these commands to appropriate functions. commands configure a mobility domain:
(Instant AP)(config)# l3-mobility
(Instant AP)(L3-mobility)# home-agent-load-balancing
(Instant AP)(L3-mobility)# virtual-controller <IP-address>
(Instant AP)(L3-mobility)# subnet <IP-address> <subnet-mask> <VLAN-ID> <virtual-controller-IP-address>