Nortel Web OS 10.0, Application Manual

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Web OS 10.0 Application Guide
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Chapter 6: Server Load Balancing
212777-A, February 2002
4. Turn on multiple
rport
for Port 80.
5. Add the ports to which the Web server listens.
Direct Server Interaction
Direct access to real servers can be provided in the following ways:
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Using Direct Server Return
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Using Direct Access Mode
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Assigning Multiple IP Addresses
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Using Proxy IP Addresses
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Mapping Ports
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Monitoring Real Servers
Using Direct Server Return
Some clients may need direct access to the real servers (for example, to monitor a real server
from a management workstation). The Direct Server Return (DSR) feature allows the server to
respond directly to the client. This capability is useful for sites where large amounts of data are
flowing from servers to clients, such as with content providers or portal sites that typically
have asymmetric traffic patterns.
DSR and content-intelligent Layer 7 switching cannot be performed at the same time because
content intelligent switching requires that all frames go back to the switch for connection splic-
ing.
N
OTE
– DSR requires that the server be set up to receive frames that have a destination IP
address that is equal to the virtual server IP address.
>> # /cfg/slb/virt 1/service 80/rport 0
>> # /cfg/slb/real 1/addport 8001
(Add port 8001 to real server 1)
>> # addport 8002
(Add port 8002 to real server 1)
>> # ../real 2/addport 8001
(Add port 8001 to real server 2)
>> # addport 8002 (Add port 8002 to real server 2)
>> # ../real 3/addport 8001
(Add port 8001 to real server 3)
>> # addport 8002 (Add port 8002 to real server 3)
>> # ../real 4/addport 8001
(Add port 8001 to real server 4)
>> # addport 8002
(Add port 8002 to real server 4)