Nortel Web OS Switch Software Application Manual page 270

Web OS 10.0 Application Guide
3. Define the virtual servers.
After defining the virtual server IP addresses and associating them with a real server group
number, you must tell the switch which IP ports/services/sockets you want to load balance on
each VIP. You can specify the service by either the port number, service name, or socket num-
ber.
>> Real server group 4 # /cfg/slb/virt 1
>> Virtual server 1 # vip 200.200.200.100 (Assign a virtual server IP address)
>> Virtual Server 1 # service 80
>> Virtual server 1 http Service # group 1 (Associate virtual port to real group)
>> Virtual server 1 # ena
Repeat this sequence of commands for the following virtual servers:
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VIP 2 200.200.200.101 will load balance HTTPS (Port 443) to Group 2
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VIP 3 200.200.200.102 will load balance POP/SMTP (Ports 110/25) to Group 3
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VIP 4 200.200.200.104 will load balance FTP (Ports 20/21) to Group 4
4. Define the client and server port states.
Defining a client port state tells that port to watch for any frames destined for the VIP and to
load balance them if they are destined for a load-balanced service. Defining a server port state
tells the port to the do the remapping (NAT) of the real server IP address back to the virtual
server IP address. Note the following:
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The ports connected to the upstream switches (the ones connected to the routers) will need
to be in the client port state.
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The ports connected to the downstream switches (the ones providing fan out for the serv-
ers) will need to be in the server port state.
Configure the ports, using the following sequence of commands:
>> Virtual server 4# /cfg/slb/port 1
>> SLB port A1 # client ena
>> SLB port A1 # ../port 2
>> SLB port A2 # server ena
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270 Chapter 11: High Availability
(Select virtual server 1)
(Assign HTTP service port 80)
(Enable the virtual server)
(Select physical switch port 1)
(Enable client processing on port 1)
(Select physical switch port 2)
(Enable server processing on port 2)
212777-A, February 2002