Affects of rate-limiting at the far end of links

Mon Dec 13 14:44:07 UTC 2004

On Mon, 13 Dec 2004, Alex Bligh wrote:

> --On 13 December 2004 13:18 +0000 Sam Stickland <sam_ml at spacething.org> 
> wrote:
>
>> doesn't lock out traffic for such long periods of time.
>> 
>> Could it be that buffers and flow-control over the 14ms third party leg
>> are causing the rate-limiting leaky bucket to continue to overflow long
>> after it's full?
>
> Or you are losing line protocol keepalives of some sort (e.g. at L2), or
> routing protocol packets. It may also be that your MPLS provider limits
> the traffic at X kbps INCLUDING protocol overhead - if so it's going to
> police out all sorts of important stuff (assuming you are running FR, ATM
> or something rather than some sort of TDM over MPLS).

Hey Alex, thanks for your reply . It's all IP over MPLS AFAIK, and we're 
using static routes to the site so I can't imagine it's either of these.

We're going to traffic shape at the remote-end, so this should alleviate 
the problem. Just really wanted to check the line 'outages' could be 
caused by the nature of rate-limiting (looks like it can) and weren't 
indicitive of another underlying problem.

Thanks,

S