The IPv4 Webcache and Server Farm

The IPv4 user clients and the webcache they access for HTTP requests are directly attached to the TWCB router. Therefore, the IPv4 Cache2 webcache is configured for standard TWCB.

Cache2 uses the non-default HTTP port 8080. A bypass list denies TWCB functionality for web requests to web hosts 50.10.10.30 to 50.10.10.43 because these sites require IP address authentication for user access. Cache2 configuration denies TWCB functionality to end-users 10.10.10.25 to 10.10.10.30.

The s2IPv4Server server farm is configured with cache servers 176.89.10.20,32,45,50,52. All cache servers are configured the same and our example shows the CLI input for cache server 176.89.10.20.

The predictor method for the s2IPv4Server is round-robin because these hosts have an expectation of heavy web-site access requirements.

The s2IPv4Server cache servers will use the default $twcb_default ICMP probe and a TCP probe for port verification with parameter values changed to a faildetect interval of 12 seconds and the number of retries to 5. The maximum number of connections per cache server will be configured for 800 for both server farms.