Cisco Systems BC-281 manual Local router, BC-304

Configuring Data-Link Switching Plus

DLSw+ Configuration Task List

For multiple peer connections, peer costs must be applied. The DLSw+ Enhanced Load Balancing feature works only with the lowest (or equal) cost peers. For example, if the user specifies dlswrtr1, dlswrtr2 and dlswrtr3 with costs of 4, 3, and 3 respectively, DLSw+ establishes new circuits with only dlswrtr 2 and dlswrtr3.

To enable the DLSw+ Enhanced Load Balancing feature on the local router, use the following command in global configuration mode:

Command	Purpose
Router(config)# dlsw load-balance [round-robin	Configures the DLSw+ Enhanced Load Balancing feature on the
circuit count circuit-weight]	local router.

To adjust the circuit weight for a remote peer with TCP encapsulation, use the following command in global configuration mode:

Command	Purpose
Router(config)# dlsw remote-peer tcp	Adjusts the circuit weight on the remote peer.
[circuit-weight value]

To adjust the circuit weight for a remote peer with DLSw+ Lite encapsulation, use the following command in global configuration mode:

Command	Purpose
Router(config)# dlsw remote-peer frame-relay	Adjusts the circuit weight on the remote peer.
interface serial number dlci number
[circuit-weight value]

The circuit-weight of a remote peer controls the number of circuits that peer can take. If multiple, equally low-cost peers can reach a remote source, the circuits to that remote source are distributed among the remote peers based on the ratio of their configured circuit-weights. The peer with the highest circuit-weight takes more circuits.

Because a DLSw+ peer selects its new circuit paths from within its reachability cache, the user must configure the dlsw timer explorer-wait-timecommand with enough time to allow for all the explorer responses to be received. If the new DLSw+ Enhanced Load Balancing Feature is enabled, a message is displayed on the console to alert the user if the timer is not set.

To configure the amount of time needed for all the explorer responses to be received, use the following command in global configuration mode:

Command	Purpose
Router(config)# dlsw timer {explorer-wait-time}	Sets the time to wait for all stations to respond to explorers.

See the DLSw+ Design and Implementation Guide for details on how to configure load balancing in DLSw+. Refer to the “DLSw+ with Enhanced Load Balancing Configuration Example” section on page 327 for a sample configuration.

	Cisco IOS Bridging and IBM Networking Configuration Guide
BC-304	78-11737-02