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C H A P T E R 18 Server Load Balancing (SLB)
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To show configuration and status of flow redirection rules, use this
command:
show flow-redirect [<flow_rule_name | <cr>]
Maintenance Mode
You can easily put a node or VIP into maintenance mode by
disabling the node or VIP. In maintenance mode, existing
connections remain active, but no new connections are permitted.
The existing connections are either closed by the client and server,
or are aged out if idle for more than 600 seconds.
Persistence
Using persistence, you can ensure that traffic flows do not span
multiple servers. The 480T routing switch supports two types of
persistence:
• Client persistence
• Sticky persistence
Client Persistence
Client persistence for a virtual server provides a persist mask
feature. You can define a range of IP addresses that can be matched
to a persistent connection. Any client whose source IP address falls
within the range is considered a match for the given persistence
entry.
To configure client persistence, use this command:
enable slb vip [<vipname> | all] client-
persistence {timeout <seconds>} {mask <mask>}
SLB Proxy Client Persistence
Use SLB proxy client persistence when you need client persistence
and you use multiple NAT address ranges to translate the internal
client IP addresses. Use these three commands:
enable slb proxy-client-persistent
disable slb proxy-client-persistent