[c-nsp] Limiting Interface Traffic

[Roger Wiklund]

When we ran 3750 switches we did srr queue bandwith for egress, and
policing on ingress, as mentioned earlier, you may need to increase
the Bc (Burst) in order to cope with TCP sawtooth.

A quick and dirty workaround if you have plenty of ports would be to
create a dummy vlan, put 2 of the ports in the dummy VLAN, and one of
the port in the real VLAN.  One of the dummy VLAN ports connect to the
customer, the other dummy VLAN port connects to the real VLAN port in
the same switch, and voilia you can use srr-queue bandwith limit for
both in and out. Just put it on the port towards the customer, and on
the port that has the real VLAN.

I have used this to overcome ACLs on switched interface that can only
be applied in the incoming direction.

Regards
Roger


On Wed, Oct 6, 2010 at 11:55 AM, Per Carlson <pelle at hemmop.com> wrote:
>> Ummm.  So how big are the buffers in the ME3600 and ME3800 series?
>
> Don't remember exactly, but the docs gives some pin points. When
> configuring WTD, it's possible with a queue-limit of 491520 bytes
> (default is 2000).
>
> --
> Pelle
>
> RFC1925, truth 11:
>  Every old idea will be proposed again with a different name and
>  a different presentation, regardless of whether it works.
>
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