Re: [nsp] Having problems using TOS

From: Alan Hannan (alan@globalcenter.net)
Date: Wed Sep 23 1998 - 17:48:14 EDT


  Bah.

  I erred with my placement of carriage returns.

  The third line is actually two lines; it should have read
  as:

   conf term
     interface [input interfacename]
       rate-limit input [bps of interface ] [Nburst] [Mburst] conform-action set=prec-transmit [prec.] exceed set-prec-continue [prec.]
     interface [output interfacename]
       rate-limit output access-group [access-group] [rate at which you wish to limit] [Nburst] [Mburst] conform-action transmit exceed-action drop

  The other interesting point is that these properties do not
  have to be on the same router, they can be on arbitrary routers,
  even within different networks/ASNs.

  -a

Thus spake Alan Hannan (alan@globalcenter.net)
 on or about Wed, Sep 23, 1998 at 02:40:47PM -0700:
>
> Like so:
>
> conf term
> interface [input interfacename]
> rate-limit input [bps of interface ] [Nburst] [Mburst] conform-action set=prec-transmit [prec.] exceed set-prec-continue [prec.] interface [output interfacename]
> rate-limit output access-group [access-group] [rate at which you wish to limit] [Nburst] [Mburst] conform-action transmit exceed-action drop
>
> This simply matches on the inbound all traffic [there may be a better
> way, but this works, though kind of ugly] and sets the precedence bits
> on it.
>
> It then puts a 'filter' on the outbound interface that matches on
> precedence bits [defined in "access-group"]. It then limits traffic
> of that 'group' to the 'rate' and drops all else within that precedence
> bit.
>
> I don't recall if all other traffic is passed through, or if you need to
> explicitly allow it through; my lab routerr are otherwise occupied
> right now.
>
> -alan
>
> Thus spake Pete Ashdown (pashdown@xmission.com)
> on or about Wed, Sep 23, 1998 at 03:08:47PM -0600:
> > Could someone either refer me to the Cisco document or give me a short
> > explanation on how to tag packets with TOS levels? What I'd like to do is
> > tag packets on an inbound port so I can rate-limit them on the outbound.
> >
> > Thanks in advance.



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