Re: OSPF Cost Question

Mike,

You probably missed the output from "show ip ospf database router"
command. By inspecting the router LSAs you will see metrics associated
with every link, e.g.

  LS age: 544
  Options: (No TOS-capability, DC)
  LS Type: Router Links
  Link State ID: 180.4.2.2
  Advertising Router: 180.4.2.2
  LS Seq Number: 80000024
  Checksum: 0x2E09
  Length: 72
  Number of Links: 4

    Link connected to: a Transit Network
     (Link ID) Designated Router address: 180.4.29.2
     (Link Data) Router Interface address: 180.4.29.2
      Number of TOS metrics: 0
       TOS 0 Metrics: 1

    Link connected to: another Router (point-to-point)
     (Link ID) Neighboring Router ID: 180.4.1.1
     (Link Data) Router Interface address: 180.4.12.2
      Number of TOS metrics: 0
       TOS 0 Metrics: 64

Notice the "TOS 0 Metrics" associated with the link. It is not very
easy to reverse map the OSPF Link-IDs to the actuall links, and hard
to figure the best paths out of this information (OSPF runs SPF to
accomplish this, after all). Keep in mind that the metric field is 16
bit and therefore cannot exceed 65535. Of course, only one metric is
supported in OSPFv2, even though there are multi-topology extensions
to OSPF that reuse the ToS metric fields.

HTH

-- 
Petr Lapukhov, petr_at_INE.com
CCIE #16379 (R&S/Security/SP/Voice)
Internetwork Expert, Inc.
http://www.INE.com
Toll Free: 877-224-8987
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2010/8/19 Mike Kiefer <mkiefer74_at_hotmail.com>:
> I have a pretty good understanding of how to read and understand the OSPF
> database thanks to Narbik's bootcamp a few weeks back. As far as I know, there
> is no way to see costs associated with each link in the link state database.
>
> Is there any way to see the advertised cost with a show command, or is that
> strictly a debug thing?
>
> I want to see the "loser" routes the didn't have a cost low enough to make it
> into the routing table.
>
> Thanks,
>
> Mike
>
>
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