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08-01-2011 03:40 AM
Can somone please confirm if this sticky feature is treated for each 'srcIP session' or 'per srcIP' ?
thanks in advance
Ajaz Nawaz
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08-01-2011 06:49 AM
Hi Ajaz,
If the sticky entry is still exsit in the ACE table for the first connection, then your second connection will hit the same server, thats why its called L3 stickiness, the ACE will not consider more than L3 information (IP address). If you still need to apply stickiness but you need more intelligent method, then L7 (cookie or HTTP) stickiness will be your option.
Best regards,
Ahmad
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08-01-2011 03:52 AM
HI Ajaz,
For sticky IP address you have three options:
ACE/Test(config)# sticky ip-netmask 255.255.255.255 address ?
both Configure sticky based on both src and destn IP address
destination Configure sticky based on destination IP address
source Configure sticky based on source IP address
Based on your configuration the ACE will stick the traffic to the server chosen.
Best regards,
Ahmad
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08-01-2011 03:53 AM
Note: This is a layer 3 stickiness, so it is source IP only not session based stickiness.
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08-01-2011 04:18 AM
Thanks Ahmad,
Ok so lets say I am the client and I open two browsers on my host laptop e.g. firefox and chrome. I target www.webpage.com using firefox hosted on destination server, and enter into a transaction based session. Then I decide to make a second purchase/transaction, but use my chrome browser this time. Just to confirm, will these second session hit the same destination server in the serverfarm because srcIP sticky netmask is configured?.
Remember that in terms of TCP this is another unique session and the src port is guaranteed to be different?.
regards
Ajaz Nawaz
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08-01-2011 06:49 AM
Hi Ajaz,
If the sticky entry is still exsit in the ACE table for the first connection, then your second connection will hit the same server, thats why its called L3 stickiness, the ACE will not consider more than L3 information (IP address). If you still need to apply stickiness but you need more intelligent method, then L7 (cookie or HTTP) stickiness will be your option.
Best regards,
Ahmad
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08-01-2011 07:29 AM
Thank you for confirming our suspicions, and to support your answer I have included below the following urls:
https://supportforums.cisco.com/message/461301#461301
https://supportforums.cisco.com/message/3406727#3406727
https://supportforums.cisco.com/message/464188#464188
kind regards
Ajaz Nawaz
