Re: bit flags for default routing

Hi Anantha,
As yo might be aware, IGRP, being classful routing protocol doesnt
advertise "0.0.0.0" network. Instead, you configure "ip default-subnet
<SUBNET>" to advertise the default candidate which will be set as Gateway of
last resort in other routers.

When "ip default-subnet " command is configured on a router, the router will
set this FLAG in External TLV to inform other routers to use this subnet as
default candidate route.

HTH,
Nagendra

On Thu, Aug 6, 2009 at 2:32 PM, Anantha Subramanian Natarajan <
anantha.natarajan_at_gravitant.com> wrote:

> Hi All,
>
> I was referring to this link
>
> http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtmland
> was reading under the heading "Route
> Tagging".Uder the same,it mentions as below.In that,what is meant by bit
> flags for default routing means and how it is useful or what is its
> significance.Thanks for the help.
>
>
> External routes are tagged with the following information:
>
> -
>
> The router ID of the EIGRP router that redistributed the route.
> -
>
> The AS number where the destination resides.
> -
>
> A configurable administrator tag.
> -
>
> Protocol ID of the external protocol.
> -
>
> The metric from the external protocol.
> -
>
> *Bit flags for default routing*
>
> Regards
> Anantha Subramanian Natarajan
>
>
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Received on Thu Aug 06 2009 - 21:19:07 ART