From: YourPal (dearprudence28@gmail.com)
Date: Mon Mar 17 2008 - 11:06:06 ART
Hi Adel Karim,
You mean, check the other OSPF routers? Yes, the other routers received the
default route generated by R1.
The thing I don't understand is, given my config and as per my
understanding, R1 should not source a default route because it does not have
a default route in its routing table eventho the route-map condition is
satisfied (i.e. 50.1.0.0/16 exists).
Unless we use the "always" keyword which causes the software to generate a
default route into OSPF regardless of the presence of a default route as
long as the route-map condition is satisfied.
I may have understood the whole concept wrongly. Please enlighten further.
Thank you.
BR,
Emil
On 3/17/08, Adel Karim <adelkarim@gmail.com> wrote:
>
> Hi Emil,
>
> You should look for the default route in the routing table of the router
> receiving the updates not the router originating the default route.
>
> HTH
> Adel Karim Mansour
>
>
> On Mon, Mar 17, 2008 at 3:08 PM, YourPal <dearprudence28@gmail.com>
> wrote:
>
> > Hi Group,
> >
> > Below is the link to the OSPF "default-information originate" command:
> >
> >
> > http://www.cisco.com/en/US/docs/ios/12_3/iproute/command/reference/ip2_c1g.html#wp1038457
> >
> > My config is as follows:
> >
> > R1:
> > !
> > router ospf 1
> > default-information originate route-map OSPF_COND_DEFAULT
> > !
> > route-map OSPF_COND_DEFAULT permit 10
> > match ip address prefix-list VLAN501
> > !
> > ip prefix-list VLAN501 seq 5 permit 50.1.0.0/16
> > !
> >
> > My understanding from DocCD is, without the "always" keyword the default
> > network must reside in the routing table, and you must satisfy the
> > route-map
> > before the software generates a default route into the OSPF routing
> > domain.
> >
> > In my config, I don't use the "always" keyword and I include a route-map
> > which "tracks" int Lo501. The router doesn't have an existing default
> > route.
> > Contrary to my understanding, it generates a default route into OSPF.
> >
> > Results below:
> >
> > R1#sh ip ro 50.1.0.0
> > Routing entry for 50.1.0.0/16
> > Known via "connected", distance 0, metric 0 (connected, via interface)
> > Redistributing via ospf 1
> > Advertised by bgp 1
> > Routing Descriptor Blocks:
> > * directly connected, via Loopback501
> > Route metric is 0, traffic share count is 1
> >
> > R1#sh ip ro 0.0.0.0
> > % Network not in table
> >
> > R1#sh ip os da
> > OSPF Router with ID (201.1.1.1) (Process ID 1)
> >
> > Type-5 AS External Link States
> >
> > Link ID ADV Router Age Seq# Checksum Tag
> > 0.0.0.0 201.1.1.1 1021 0x80000001 0x000ED7 1
> >
> >
> > I believe I understand the concept wrongly. Anyone kindly share your
> > view?
> >
> >
> > Thank you.
> >
> > BR,
> > Emil
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
>
> --
> Regards
> Adel Karim Mansour
> CCIE# 20147 R&S
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