Pavel Bykov wrote:
> If it is all default config, there probably will be a different cost,
> because when you use clock rate on DCE interface, bandwidth will be set to
> the clock rate and cost will be huge. But on DTE interface, it will still be
> 1536kbps. so you'd need to synchronize bandwidth parameters there
>
The 'clock rate' command has no effect on the 'bandwidth' command,
whether the interface is DCE or DTE. Unless you also set bandwidth
manually, for a T1 interface the bandwidth will be 1544, and so OSPF
uses a cost of 64. You could configure bandwidth to be much higher than
the clock rate, if you really want to.
It is of course important that you configure appropriate values using
the bandwidth command, for various routing and QoS considerations but
also to make it easier for others to understand the network.
This does not necessarily mean that bandwidth values should match
between neighboring routers, a common example where the values often
differ occurring with hub and spoke frame relay.
Paul.
Blogs and organic groups at http://www.ccie.net
Received on Thu May 21 2009 - 11:57:59 ART
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