Answers in-line.
JMcL
----- Forwarded by Jenny Mcleod/NSO/CSDA on 10/07/2002 11:29 am -----
"Priscilla Oppenheimer"
Sent by: [EMAIL PROTECTED]
10/07/2002 09:09 am
Please respond to "Priscilla Oppenheimer"
To: [EMAIL PROTECTED]
cc:
Subject: RE: interface traffic showing unreasonable statist
[7:48397]
[EMAIL PROTECTED] wrote:
>
> Priscilla's answer is very true, but I have seen interfaces
> reporting
> one-way traffic greater than they should be able to transmit -
> for
> example, an ISDN B-channel reporting an output rate of 66
> kbps. Not a
> pretty sight.
>
> While I didn't check it in detail, my assumption was that it
> was reporting
> the load the router was attempting to shove over the link - I
> don't think
> all that traffic was making it to the other end :-(
Were there also output drops? It seems like there would have to be.
JMcL: I think there were. I was concentrating on dragging another few
channels up by their scruffs at the time, so I wasn't too fussed about
whether there were drops - I knew the users at the other end of the
channels were getting lousy responses, so what's a few drops here and
there ;-)
Another thought is that it's just an average. There could be rounding
errors. Yeah, that's it, rounding errors. ;-)
JMcL: I think this can also be a factor sometimes - rounding errors or
perhaps timing (calculation) issues. It might explain my 66 kbps over a
B-channel, but I'm not sure it can be used to fully explain 320 Kbps over
a 256 Kbps link.
Also, I've always wondered about CIRs and fractional interfaces. The
router
doesn't know that it's not supposed to send above its interface type,
without some advanced configuration, does it?
JMcL: Welcome to my friend, frame relay traffic shaping :-) We have
basically a hub and spoke network, so yes, without traffic shaping the hub
will quite happily try to stuff 1 Mbps down a PVC that only has a 256 kbps
access at the other end. This does not do good things for performance.
FRTS prevents this, and keeps hub and spoke networks (and users) much
happier.
Priscilla
>
> JMcL
> ----- Forwarded by Jenny Mcleod/NSO/CSDA on 10/07/2002 08:38 am
> -----
>
>
> "Priscilla Oppenheimer"
> Sent by: [EMAIL PROTECTED]
> 10/07/2002 02:31 am
> Please respond to "Priscilla Oppenheimer"
>
>
> To: [EMAIL PROTECTED]
> cc:
> Subject: RE: interface traffic showing
> unreasonable statistics [7:48397]
>
>
> uday wrote:
> >
> > Hi all,
> > I am using a cisco router with a frac-E1 link terminated on it
> > (256kbps). I am
> > running some Ipsec tunnels
> > across this link. Sometimes i have found that i/p o/p rate
> > shows more then
> > 256kbps using the show interface ser command.
>
> Do you mean that the combined input/output rate exceeds 256
> kbps? That
> could
> be normal. It's full duplex. The capacity is available in both
> directions
> on
> point-to-point WAN circuits.
>
> Priscilla
>
> >
> > i have seen it upto 320000 bps?
> >
> > Plz can somebody explain this?
> > thanks /regards,
> >
> > Uday
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