Dynamically throttle traffic via QOS

[Ron_VanCleave]

Hi,

Is it possible to dynamically throttle

application specific traffic with the

QOS and or ACL capabilities of the

6500 CSM?

More general question might be is if

there exists devices that allow

application traffic to be throttled

up/down at near real-time.

Example would be during application

maintenance of a geographically load

balanced application that normally

directs 50% to geo A and 50% to geo B.

ReDirect the 50% traffic from B to A

so that B can be maintained, then

subsequently reverse the strategy

while A is being maintained. Then of

course after maintenance is completed

return traffic to the original 50,50

distribution.

Thanks in advance.

PS: I apologies if this question does

not make sense, new to this technology.

[Gilles Dufour]

qos has nothing to do with this.

Not sure how you expected QOS to help you here.

Your solution is actually quite easy, if you do a 'no inservice' of the real you want to work on, all new connections will be sent to the remaining server.

Existing connections will stay on the real even if not in service.

If this is a problem, you can do the 'no inservice' then wait 24 hours and normally there should be no more active connections to your down server.

You can then do your modification.

Regards,

Gilles.

[Ron_VanCleave]

Thanks,

The 'no inservice' methodology would be a latch

type of condition, while this is a solution for

the 0% traffic allowed scenario, was hoping to

leverage a methodology that would allow variable

levels of traffic being allowed.

I.E: 5% allowed 95% redirected

10% allowed 90% redirected

20% allowed 80% redirected

This would allow traffic to be incrementally

throttled up,down.

Thanks for the hint though.

[Gilles Dufour]

You can play with the weight.

You set the weight to 5 on all servers and when you need to turn one down, you reduce the weight to 4,3,2,1,0

This requires manual intervention or a script from a management station could do this for you.

Regards,

Gilles.