From: Kevin (h_kvn@yahoo.com)
Date: Sat Nov 20 2004 - 13:16:08 GMT-3
Tim,
I believe that if you want a router to act as a non-cisco router you would use itef
encapsulation and FRF9 payload-compression:
R1(config-if)#frame-relay map ip 1.1.1.1 111 ietf payload-compression ?
FRF9 FRF9 encapsulation
data-stream cisco proprietary encapsulation
packet-by-packet cisco proprietary encapsulation
HTH
Kevin
--- ccie2be <ccie2be@nyc.rr.com> wrote:
> Joe,
>
> Actually, that's not a silly question. In the case of compression, YES, it
> does have to be configured on both sides of link, but there are a number of
> other configuration commands that aren't or don't have to be "Symmetrical".
>
> When you think about what compression is doing, it makes sense that
> compression has to be configured on both sides for a couple of reasons.
>
> 1) If compression is only configured on one side, how would the other side
> know what to do with the bits it's getting. To the side without compression
> configured, it would appear as just a stream of garbage. ( I'm not
> referring to ppp which might negotiate if and what type of compression to
> use).
>
> 2) There are multiple types of compression that could be used including
> header, payload, Stac, Predictor, and maybe others I'm not aware of. If one
> side is using one type of compression and the other side isn't using
> compression or is using a different type of compression, you'll have a
> mismatch.
>
> On the other hand, I can think of a few things which don't have to be
> symmetric. For example, queueing and shaping and filtering. And, if you
> think about dialup links, there are a number of additional things that you
> might configure on only one side. For example, one-way authenitication,
> dialer idle-timeout, dialer load-threshold, etc.
>
> HTH, Tim
> ----- Original Message -----
> From: "Joe Chang" <changjoe@earthlink.net>
> To: <ccielab@groupstudy.com>
> Sent: Saturday, November 20, 2004 9:37 AM
> Subject: Re: Standard compression methods
>
>
> > Silly question: does compression have to be configured on both sides of a
> point to point link, or would configuring just one side work?
> >
> >
> > > Tim,
> > >
> > > Stac is Cisco proprietary. If Cisco uses standard compression, then it
> must be Predictr.
> > >
> > > ccie2be <ccie2be@nyc.rr.com> wrote:
> > > Hi guys,
> > >
> > > Of the different 2p2 link payload compression methods available, which
> ones
> > > are "Standard" and will therefore interoperate with non-cisco routers?
> > >
> > > I believe Predictor is the only one, but can anyone confirm that?
> > >
> > > TIA, Tim
> >
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