Tunable Hash For Filter Redirection - Nortel Web OS Switch Software Application Manual

Web OS 10.0 Application Guide
All clients are limited to 100 new TCP connections/second to the server. If a client exceeds this
rate, then the client is not allowed to make any new TCP connections to the server for 40 min-
utes.
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or slowage parameters.

Tunable Hash for Filter Redirection

Web OS 10.0 allows you to choose a number of options when using the hash parameter for fil-
ter redirection. Hashing can be based on source IP address, destination IP address, both, or
source IP address and source port. For example:
1. Configure hashing based on source IP address:
>> # /cfg/slb/filt 10/ena
>> Filter 10 # action redir
>> Filter 10 # proto tcp
>> Filter 10 # group 1
>> Filter 10 # rport 3128
>> Filter 10 # vlan any
>> Filter 10 # adv
>> TCP advanced menu # thash sip
Hashing on the 24-bit source IP address ensures that client requests access the same cache.
2. Set the metric for the real server group to minmisses or hash
The source IP address is passed to the real server group for either of the two metrics.
>> # /cfg/slb/group 1
>> Real server group 1 # metric minmiss
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which hashes on source and destination IP addresses will override the tunable hash filter.
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184 Chapter 7: Filtering
–
All SLB sessions on the switch are affected when you make changes to the fastage
– If firewall load balancing is enabled on the switch, the firewall load balancing filter
(Enable the filter)
(Specify the redir action)
(Specify the protocol)
(Specify the group of real servers)
(Specify the redirection port)
(Specify the VLAN)
(Select the advanced filter menu)
(Select source IP address for hashing)
.
(Select the group of real servers)
(Set the metric to minmiss or hash)
212777-A, February 2002