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Posted by Vincent C Jones on November 21, 2005, 10:57 am
>I have two parallel paths between a pair of routers. They are running
>Eigrp between them. The bandwidths are very close to each other (704K
>and 768K) so Eigrp Unequal cost load balancing doesn't really help me
>because the traffic share count is usually 1 to 1.
>I could get around this by altering the delay of one of the links and
>then maybe have a trafic share count of 2 to 1.
>I've tried per packet load balancing but because of the varying
>latencies in each link, that doesn't work out too well for me.
>What I would like to do is have a way of preferring the faster (less
>latency) link until the bandwidth reaches a certain point, then
>allowing the slower (greater latency) link to kick in.
>The reason being is that sometimes 1 user will download a huge file
>which will consume the entire bandwidth of 1 one link. Other users
>will try to connect and because of typical per session or per
>destination load balancing, they will attempt to also use the congested
>link. I would like to avoid this. I want a way to set a threshold
>for a particular link by % utilization, then put that link on hold
>until the % util drops below a certain point.
>If anyone sees what I mean here and has a solution, that would be
>greatly appreciated.
>Thank You
If the problem is a single FTP transfer, it sounds like weighted
fair queueing (WFQ) is not doing its thing. Could be because WFQ
has been disabled (or something about the configuration disables
it by default), or you may need to add traffic shaping on the links
to give WFQ a chance to kick in before the link is totally clogged.
Good luck and have fun!
--
Vincent C Jones, Consultant Expert advice and a helping hand
Networking Unlimited, Inc. for those who want to manage and
Tenafly, NJ Phone: 201 568-7810 control their networking destiny
http://www.networkingunlimited.com
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>Eigrp between them. The bandwidths are very close to each other (704K
>and 768K) so Eigrp Unequal cost load balancing doesn't really help me
>because the traffic share count is usually 1 to 1.
>I could get around this by altering the delay of one of the links and
>then maybe have a trafic share count of 2 to 1.
>I've tried per packet load balancing but because of the varying
>latencies in each link, that doesn't work out too well for me.
>What I would like to do is have a way of preferring the faster (less
>latency) link until the bandwidth reaches a certain point, then
>allowing the slower (greater latency) link to kick in.
>The reason being is that sometimes 1 user will download a huge file
>which will consume the entire bandwidth of 1 one link. Other users
>will try to connect and because of typical per session or per
>destination load balancing, they will attempt to also use the congested
>link. I would like to avoid this. I want a way to set a threshold
>for a particular link by % utilization, then put that link on hold
>until the % util drops below a certain point.
>If anyone sees what I mean here and has a solution, that would be
>greatly appreciated.
>Thank You