mpls bandwidth parameter question

[fabio9]

Hi,a question about the "bandwidth" parameter to be set in the tunnel configuration.The question is...does this parameter impact on the overall performance of the tunnel ?
I'll try to explain...

I have a problem with a branch office. The employes are experiencing slow connections with no reasonable reason.
So, although my knowledge of networking is limited, I'm trying to find the problem.

The tunnel bandwidth configuration, until yesterday, was (for a mistake? Here we have no direct controls of the line trasmission, there is a monopoly) at 9k, so with with the lanmeter (fluke) I was reading bad data, like 139% of used bw.We have 2mbit symmetrical mpls, so I manually set the bw to the 2048.

Until this, simply trasferring a (huge) file results in a network congestion, with loss of packets, so ONE user can "flood" the line moving ONE file...
But, after setting the rigth bw, no more problem of this kind seems to occur.

It is this regular ?

I mean...the bad setting of the parameter "bandwith" in the single (and active) tunnel can impact the performace of the whole tunnel ?

In this case, where (very important...) I can find documentation about this ?

Many thanks in advance.

 

[plshlpme]

i would think that if you had policy maps attached to the interfaces and they were based on percentages then a misconfigured bandwidth statement could cause trouble..

do you have any policies attached to your tunnels?

 

[fabio9]

I think so...
I asked to a couple of specialist, the say "yes, can impact"..

hmmm...

 

[plshlpme]

yes well if you have a policy that says let 30% though and drop or queue all packets after... then your going to have issues if youve told your interface that its only 128k instead of 1.54mb... the numbers that the policy uses will be based on the bandwidth xx that you set to the interface

you really need to study the config and see what the rules are for your interfaces..