Nortel Networks WEB OS 212777 User Manual
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Web OS 10.0 Application Guide
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Chapter 11: High Availability
212777-A, February 2002
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.
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:
>> Real server group 4 # /cfg/slb/virt 1
(Select virtual server 1)
>> Virtual server 1 # vip 200.200.200.100
(Assign a virtual server IP address)
>> Virtual Server 1 # service 80
(Assign HTTP service port 80)
>> Virtual server 1 http Service # group 1
(Associate virtual port to real group)
>> Virtual server 1 # ena
(Enable the virtual server)
>> Virtual server 4# /cfg/slb/port 1
(Select physical switch port 1)
>> SLB port A1 # client ena
(Enable client processing on port 1)
>> SLB port A1 # ../port 2
(Select physical switch port 2)
>> SLB port A2 # server ena
(Enable server processing on port 2)