destination ip

Use this command to assign the access list containing public facing TWCB router web cache destination IP addresses.

Syntax

Parameters

Defaults

None.

Mode

Configuration command, web cache Configuration mode.

Usage

This command configures the TWCB destination NAT component of the TWCB source and destination NAT feature. The configuration of TWCB source and destination NAT allows the client, TWCB router, and web cache server to reside anywhere in the network and still provide for the forwarding of an HTTP request from the client to the web cache server. TWCB source and destination NAT also provides for the reverse forwarding from the web cache server to the client, assuring that the packet flow will pass through the TWCB router.

Destination IP addressing provides a public facing address, owned by the TWCB router, that the client making an HTTP request can use to reach the web cache server from anywhere in the network. The public web cache addresses are defined in a standard access list that is assigned to a web cache configuration using this command. TWCB forwards the HTTP request to the appropriate web cache server for processing.

Before TWCB forwards the HTTP request to the web cache server, it first selects a source NAT address from the IPv4 source NAT pool or IPv6 source NAT address range defined using source nat pool. Using this public facing source NAT address assures that the web cache server reverse packet flow will pass through the TWCB router on its way back to the client.