[c-nsp] OSPF Default Route Injection

[Steve Shaw]

Default routes originated into a stub area from an ABR are type-3 LSAs:

                Summary Net Link States (Area 250)

Link ID         ADV Router      Age         Seq#       Checksum
0.0.0.0         x.x.x.x   1658        0x8000250F 0x006B8C
0.0.0.0         x.x.x.x   1634        0x8000250D 0x005D9A

-Steve

On Thu, Mar 18, 2010 at 2:53 PM, Leah Lynch (Contractor) <
leah.lynch at clearwire.com> wrote:

> I am pretty sure default routes are always type-5 because they contain
> no native link data. But, I don't think the spec calls this out
> specifically. I am wondering if anyone out there has seen a default
> route that was not a type-5, and if so, could they post a snippet of
> that LSA database?
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Kevin Hatem
> Sent: Thursday, March 18, 2010 10:34 AM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] OSPF Default Route Injection
>
> If two routers are injecting a default route under OSPF then each router
> will retain their own default route in the route table as each other's
> injected default route has the same distance as its self advertised
> default.  You could set a higher/lower distance on inbound
> advertisements from the neighbors to influence the installation of the
> default route into the RIB.
>
> HTH
> -kevin
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of David Granzer
> Sent: Thursday, March 18, 2010 09:13
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] OSPF Default Route Injection
>
> Hello,
>
> please could someone explain what exactly command "default-information
> originate always" under ospf process works ?  When you have more than
> one router configured with this default route injection is correct
> behavior that you don't see on these routers default route in their ip
> routing table from other routers and you see only external lsa for
> 0.0.0.0 in ospf database ?
>
> Thanks,
> David
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