Nortel Networks WEB OS 212777 - Manual (Page 298)

Web OS 10.0 Application Guide
298 n Chapter 12: Global Server Load Balancing
212777-A, February 2002
Task 3: Configure the California Site for GSLB
1. On the California switch, define each remote site.
When you start configuring at the California site, California is local and Denver is remote. Add
and enable the remote switch’s IP address interface. In this example, there is only one remote
site: Denver, with an IP interface address of 174.14.70.100. The following commands are used:
Each additional remote site would be configured in the same manner. You can enable up to 64
remote sites with a total aggregate of 2048 service/site combinations.
2. On the California switch, assign each remote distributed service to a local virtual server.
Configure the local California site to recognize the services offered at the remote Denver site.
To do this, configure one real server entry on the California switch for each virtual server
located at each remote site. Since there is only one remote site (Denver) with only one virtual
server, only one more local real server entry is needed at the California site.
The new real server entry is configured with the IP address of the remote virtual server rather
than the usual IP address of a local physical server. Do not confuse this value with the IP inter-
face address on the remote switch.
Also, the remote parameter is enabled, and the real server entry is added to the real server
group under the local virtual server for the intended service. Finally, since the real server health
checks are performed across the Internet, the health-checking interval should be increased to
30 or 60 seconds to avoid generating excess traffic. For example:
N OTE – Take care to note where each configured value originates or this step can result in
improper configuration.
>> Layer 4# gslb/site 1 (Select remote site 1)
>> Remote site 1# prima 174.14.70.100 (Define remote interface)
>> Remote site 1# ena (Enable remote site 1)
>> Remote site 1# /cfg/slb/real 3 (Create an entry for real server 3)
>> Real server 3# rip 174.14.70.1 (Set remote virtual server IP address)
>> Real server 3# remote enable (Define the real server as remote)
>> Real server 3# inter 60 (Set a high health check interval)
>> Real server 3# ena (Enable the real server entry)
>> Real server 3# ../group 1 (Select appropriate real server group)
>> Real server group 1# add 3 (Add real server 3 to the group 1)