[mrtg] Re: OFF-TOPIC: [maxbytes] for Cisco

[Reed Mohn, Anders]

Thanks, Jörg.

I know the Cisco will use 56k (US standard)
for BRI interfaces, but when you specify the European ISDN standard,
it changes to 64k. I just found it strange that the router
does not take this into account with the Dialer interfaces as well.

Cheers,
Anders :)



-----Original Message-----
From: "Helmert, Jörg" [mailto:Joerg.Helmert at EINSTEINet.de]
Sent: 10. mai 2001 11:18
To: 'Reed Mohn, Anders'; Mrtg mailing list (E-mail)
Subject: AW: [mrtg] OFF-TOPIC: [maxbytes] for Cisco


Hi,

as long as you do not specify a "bandwidth xxx" comand,
the router reports the default bandwidth for that interface.

Looks like this is 56k for Dialer and 64k for BRI.
Out of my mind:
for serials this is T1 which is around 1.5 MBit/s
allthough these interfaces are capable of 2 MBit/s

So on your Dialer set bandwidth 64.
I set bandwidth appropriate for almost every interface
(like 10/100 mbit ethernet, serial, bri, pri),
just to be sure I have the right values.
I do not rely on the default speed.

bye,

 Joerg Helmert

-----Ursprüngliche Nachricht-----
Von: Reed Mohn, Anders [mailto:Anders.Reed.Mohn at itcompagniet.no]
Gesendet: Donnerstag, 10. Mai 2001 10:49
An: Mrtg mailing list (E-mail)
Betreff: [mrtg] OFF-TOPIC: [maxbytes] for Cisco





Ahh..  this annoyed the **** out of me,
I used cfgmaker to get the config from a Cisco
router, and the BRI interface came back with maxbytes 8000,
while the Dialer interfaces mapped on to it came back with 7000.
I couldn't figure out why until I had a closer look at the router.

Can anyone tell me whether this is just a default thing in Cisco?
(or is there another reason for it?)
AFAIR, the dialer IF's were not specifically configured to be 56k,
but "show interface" clearly states 56k...

Cheers,
Anders RM :)





-----Original Message-----
From: Alex van den Bogaerdt [mailto:alex at slot.hollandcasino.nl]
Sent: 10. mai 2001 09:38
To: martinr at hotkey.net.au
Cc: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: cfgmaker and Maxbytes



Martin Rheumer wrote:

> When I run the cfgmaker over a router ( that changes frequently )
> I get a series of configs where the Maxbytes are set to 8012 Bytes.
> These lines are capable of 256000 Bytes.
> Is this a global setting that I can set for this when cfgmaker
> runs or a better way then having to go and manually change this
> after its run ?

This has just recently been discussed.
The MaxBytes setting comes from the device itself.  If the
device reports 8012 Bps (strange value BTW) then 8012 it is.

The proper way is to make a change on the device.  This may not
be possible.  In that case there is not much you can do apart
from altering the cfgmaker output.

In stead of manually altering it, you could write a script that
filters the output of cfgmaker thereby changing those values.
This is useful if you recreate your config file frequently.

cheers,
-- 
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