To further clarify, here is the reference from the IOS command reference,
found on CCO
( http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/i
nter_r/irdacces.htm#1018150 )
watch this nasty word wrap !!
-------------------
Usage Guidelines
----------------------------------------------------------------------------
----
Note The bandwidth command sets an informational parameter only to
communicate the current bandwidth to the higher-level protocols; you cannot
adjust the actual bandwidth of an interface with this command.
----------------------------------------------------------------------------
----
For some media, such as Ethernet, the bandwidth is fixed; for other media,
such as serial lines, you can change the actual bandwidth by adjusting
hardware. For both classes of media, you can use the bandwidth configuration
command to communicate the current bandwidth to the higher-level protocols.
IGRP uses the minimum path bandwidth to determine a routing metric. The TCP
protocol adjusts initial retransmission parameters based on the apparent
bandwidth of the outgoing interface.
At higher bandwidths, the value you configure with the bandwidth command is
not what is displayed by the show interface command. The value shown is that
used in IGRP updates and also used in computing load.
----------------------------------------------------------------------------
----
Note This is a routing parameter only; it does not affect the physical
interface.
----------------------------------------------------------------------------
----
Examples
The following example sets the full bandwidth for DS3 transmissions:
Router(config)# interface serial 0
Router(config-if)# bandwidth 44736
--------------------------
as you can see, the command merely communicates information to higher level
protocols, usually meaning routing protocols, which would use the
information for path determination.
HTH
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
lee
Sent: Saturday, July 29, 2000 11:44 AM
To: [EMAIL PROTECTED]
Subject: Re: Something I want to know but are not afraid anymore to
as.....you guys & gals
Hi, from what i understand is the 'bandwidth' command would not affect the
actual link. Basically. the 'bandwidth' command is an informational command
for each of the interfaces. If you don't put in 'bandwidth', you wouldn't
able to get the accurate load statistic of the interface. For example, for
the serial interface, the default bandwidth is T1 (1.544Mbps), if the actual
link is 64Kbps and you configured the serial interface without 'bandwidth'
command, sure you get 1/255 load on the interface all the time, eventhough
the link is very congest.
Another functionality of 'bandwidth' command is you can use this command to
choose the prefer route that you want if you have multiple path to the same
destination. Some dynamic routing protocol is using 'bandwidth' as the
metric, like EIGRP, OSPF, etc.
Sorry for my bad english. Hope it can help you out.
regard,
lee
"Olden Pieterse" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi there
>
> Ive seen some of my fellow engineers put : bandwidth 8 : statement in a
> config on a 64k isdn line we used for dial on demand .
> As far as I know you put the bandwidth equal to the size of your line (56
or
> 64 etc) .
> What does this imply ? Is the datastreams smaller (8k) but still utilizing
> the whole 64k or is it wasted space (which I cannot think why you would
want
> to waste bandwidth ?
>
> waiting in anticipation....
>
> Cheers
> Olden Pieterse
> MCP , CCNA , BCMSN , BSCN , BCRAN
> Brainbench Certified CISCO Network Implementation Specialist
> Technical Consultant
> Mobile : +27 82 410 8621
>
> ___________________________________
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