Re: NSSA default route cost

With the first option all routes advertised in area 2 like summaries will
get a cost of 500. With that new configuration only the default that's
advertised will get that cost.

--
Regards,
Rick Mur
CCIE2 #21946 (R&S / Service Provider)
Juniper JNCIA-ER & JNCIA-EX
MCSA:Messaging, MCSE
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On Thu, Aug 20, 2009 at 12:21 PM, <mihai.grigore_at_orange-ftgroup.com> wrote:
> Fellow experts,
>
> I am trying to find out if there is any difference in setting the cost of
> the
> default route injected in the NSSA area. I used the following 2
> configurations
> and I can see no difference in the LSA. Here we go:
>
> first option:
> ==========
> router ospf 1
>  area 2 nssa default-information-originate
>  area 2 default-cost 500
>
> second option:
> ============
> router ospf 1
>  area 2 nssa default-information-originate metric 500
>
>
> In both cases, I can see the same metric in the Type-7 LSA:
>
> Rack1SW3#sh ip o da nssa-external 0.0.0.0
>
>            OSPF Router with ID (150.1.9.9) (Process ID 1)
>
>                Type-7 AS External Link States (Area 2)
>
>  Routing Bit Set on this LSA
>  LS age: 388
>  Options: (No TOS-capability, No Type 7/5 translation, DC)
>  LS Type: AS External Link
>  Link State ID: 0.0.0.0 (External Network Number )
>  Advertising Router: 150.1.3.3
>  LS Seq Number: 80000003
>  Checksum: 0x1FFD
>  Length: 36
>  Network Mask: /0
>        Metric Type: 2 (Larger than any link state path)
>        TOS: 0
>        Metric: 500    <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>        Forward Address: 0.0.0.0
>        External Route Tag: 0
>
>
> I guess there is no difference, the first configuration is the legacy while
> the
> second one is the newer way to configure it.
>
> Thanx, best regards, Mihai
>
>
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