Nortel Networks WEB OS 212777 - Manual (Page 352)

Web OS 10.0 Application Guide
352 n Chapter 13: Firewall Load Balancing
212777-A, February 2002
Using HTTP Health Checks
For those firewalls that do not permit ICMP pings to pass through, Web switches can be con-
figured to perform HTTP health checks, as described below.
1. Set the health check type to HTTP instead of ICMP.
2. Configure a “dummy” redirect filter as the last filter (after the redirect all filter) to force
the HTTP health checks to activate, as shown below:
N OTE – Make sure that the number of each real filter is lower than the number of the “dummy”
redirect filter.
>> # /cfg/slb/group 1/health http (Select HTTP health checks)
>> # /cfg/slb/filt 225 (Select filter 225)
>> Filter 224# proto tcp (For TCP protocol traffic)
>> Filter 224# action redir (Redirect the traffic)
>> Filter 224# group 1 (Set real server group for redirection)
>> Filter 224# rport http (Set real server port for redirection)
>> Filter 224# ena (Enable the filter)