With the default BW of the serial connections (1.544Mbps), the OSPF cost is
64. If the BW is changed to 56k (router(config-if)#bandwidth 56), the cost
becomes 1785.
With the OSPF cost of 50, it means that you have a 2.0Mbps connections at
your spoke.
Arthur
>From: "Nigel Taylor" <[EMAIL PROTECTED]>
>Reply-To: "Nigel Taylor" <[EMAIL PROTECTED]>
>To: "CCIE_Lab Group Study" <[EMAIL PROTECTED]>, "Cisco Group
>Study" <[EMAIL PROTECTED]>
>Subject: OPSF interface cost values....
>Date: Sat, 24 Mar 2001 07:55:03 -0500
>
>All, =20
> I have been working through some theory and everything I read shows =
>a Serial interface ospf cost(10*8/BW) as being 64.
>However, in working through some configurations I found this no to be =
>true(possible IOS related bug). The basic setup.. with hub and spoke =
>topology and I get the following
>
>HUB:
>Serial0.1 is up, line protocol is up=20
> Internet Address 172.168.100.5/24, Area 10=20
> Process ID 1, Router ID 192.168.55.1, Network Type =
>POINT_TO_MULTIPOINT, Cost: 64
> Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
> Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
> Hello due in 00:00:01
>
>Spoke:
>Serial0 is up, line protocol is up=20
> Internet Address 192.168.100.3/24, Area 10=20
> Process ID 1, Router ID 172.168.30.97, Network Type =
>POINT_TO_MULTIPOINT, Cost: 50
> Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
> Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit=20
>
>Spoke:
>Serial0 is up, line protocol is up=20
> Internet Address 192.168.100.3/24, Area 10=20
> Process ID 1, Router ID 172.168.30.97, Network Type =
>POINT_TO_MULTIPOINT, Cost: 50
> Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT,
> Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
>
>Now this isn't a major problem but I was wondering if confronted with a =
>requirement in the lab to adjust the cost of how a specific route is =
>seen on another router, do I first change this to reflect the standard =
>ospf cost value(64) and then adjust the cost elsewhere to meet the =
>requirement. I know there's more than one way to get these things =
>done.. just wondering what everyone else suggest...
>
>TIA
>
>Nigel..
>42 days...
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