From: ccie2be (ccie2be@nyc.rr.com)
Date: Sat Nov 20 2004 - 12:00:23 GMT-3
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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