From: Alex Moore (almooreIZZATverio.net)
Date: Fri Nov 14 2003 - 05:48:50 EST
I have a problem whereby sessions are clearly being lost. I was
wondering if someone could assist.
The setup is two Alteon AceDirector3 running 10.0.28.5-SSH.
A VSR VIP load balances 3 servers using the 'hash' metric.
Temporary cookie inserts are also configured.
What I have seen is:
User connects...based on IP they reach the correct server (verified by
client IP and /info/slb/idshash)...server 1.
They then later send a request with a cookie for server 1 (verified by
/info/slb/cookie), but they are passed to server 3.
I also see a user connects and based on their IP they should reach
server 3, but instead they reach server 1. When they reconnect they
present an Alteon cookie that says server 3 and their IP also says
server 3 again.
And several other variations of the above two. A common feature is that
many clients are coming from AOL (though not all) which I realise does
have changing IPs, however the cookie insert is supposed to fix this.
There are NO real server failovers or VRRP failovers logged.
The stats list:
HTTP header loadbalance stats:
'Cookie' Hits: 21505110
'Cookie' Misses: 1774718
'Cookie' Inserts: 1840428
Total 'Cookie' Sessions: 23279828
With very few health check failures in the total uptime of the platform,
why are there so many 'Cookie' Misses?
Any help would be much appreciated.
The Load Balancing Mailing List
MRTG with SLB: http://vegan.net/MRTG
Hosted by: http://www.tokkisystems.com
This archive was generated by hypermail 2.1.4 : Fri Nov 14 2003 - 06:00:46 EST