Nortel Networks Sticky sessions on Alteon Application Switch 2208

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Subject Author Date
Sticky sessions on Alteon Application Switch 2208 smotsie 01-12-07
Posted by smotsie on January 12, 2007, 9:26 am
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Hi,

We have an Alteon Application Switch 2208, running software Version
21.0.4 and we have a problem with session management. I want any user
connecting to our web app. to be allocated a server by almost any
algorithm (least used, round robin etc.) and then to stay on that
server. At present every single request seems to go to alternate
servers, which makes our login asp fail, as the servers are looking for
a session variable to be set (we DON'T want to re-write the app, far
too much work involved)

Does anyone know how to enable sticky session support on this hardware
/ software combo? Have we bought the wrong system? (I _really_ hope
not!!!)

For info the group is configured thus:

Current real server group 210:
name , metric roundrobin, backup none, realthr 0
health tcp, content
DSR VIP health: enabled
IDS Group: disabled IDS rport: any IDS flood: disabled
adv health:
real servers:
162: 192.168.211.162, enabled, name , weight 1, timeout 40 mins,
maxcon 200000
backup none, inter 2, retry 4, restr 8
remote disabled, proxy enabled, submac disabled
cookie assignment server: disabled
exclusionary string matching: disabled
163: 192.168.211.163, disabled, name , weight 1, timeout 40 mins,
maxcon 200000
backup none, inter 2, retry 4, restr 8
remote disabled, proxy enabled, submac disabled
cookie assignment server: disabled
exclusionary string matching: disabled
real ports:
http: vport http
virtual server: 210, 192.168.208.210, enabled


Posted by Dophi on January 14, 2007, 12:57 am
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Change the metric to "hash" or "minmiss" will probably solve your
problem.

smotsie wrote:
> Hi,
>
> We have an Alteon Application Switch 2208, running software Version
> 21.0.4 and we have a problem with session management. I want any user
> connecting to our web app. to be allocated a server by almost any
> algorithm (least used, round robin etc.) and then to stay on that
> server. At present every single request seems to go to alternate
> servers, which makes our login asp fail, as the servers are looking for
> a session variable to be set (we DON'T want to re-write the app, far
> too much work involved)
>
> Does anyone know how to enable sticky session support on this hardware
> / software combo? Have we bought the wrong system? (I _really_ hope
> not!!!)
>
> For info the group is configured thus:
>
> Current real server group 210:
> name , metric roundrobin, backup none, realthr 0
> health tcp, content
> DSR VIP health: enabled
> IDS Group: disabled IDS rport: any IDS flood: disabled
> adv health:
> real servers:
> 162: 192.168.211.162, enabled, name , weight 1, timeout 40 mins,
> maxcon 200000
> backup none, inter 2, retry 4, restr 8
> remote disabled, proxy enabled, submac disabled
> cookie assignment server: disabled
> exclusionary string matching: disabled
> 163: 192.168.211.163, disabled, name , weight 1, timeout 40 mins,
> maxcon 200000
> backup none, inter 2, retry 4, restr 8
> remote disabled, proxy enabled, submac disabled
> cookie assignment server: disabled
> exclusionary string matching: disabled
> real ports:
> http: vport http
> virtual server: 210, 192.168.208.210, enabled


Posted by smotsie on January 16, 2007, 7:40 am
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Dophi wrote:
> Change the metric to "hash" or "minmiss" will probably solve your
> problem.

Thanks for that, Dophi. It worked using "minmiss". I don't understand
why "roundrobin" works this way, but at least the problem is solved.


Posted by angler on January 18, 2007, 1:59 am
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Because that is what round robin does. Each TCP session is sent to a
different server in turn. It doesn't matter if each session is from
the same client.


smotsie wrote:
> Dophi wrote:
> > Change the metric to "hash" or "minmiss" will probably solve your
> > problem.
>
> Thanks for that, Dophi. It worked using "minmiss". I don't understand
> why "roundrobin" works this way, but at least the problem is solved.


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