default route tag

[phamthecong]

dear all,

is there any way to manage the default route's tag?

I setup " ip route 0.0.0.0 0.0.0.0 1.1.1.1 tag 1234"

then, "show ip ospf database" shows different value for default route.

thanks

[Harold Ritter]

The default route is a special case since it can only be injected in ospf using the "default-information originate" command. If you want a tag to be set on the default route, you need to use a route-map on the "default-information originate" command as follow:

route-map setTag permit 10

set tag 1234

router ospf 1

default-information originate route-map setTag

For other static routes the tag set on the static route is used to set the ospf tag when redistributing static to ospf.

Hope this helps,

[phamthecong]

thanks Hritter,

that's all i want. Another quest.

In OSPF I want to advertise a default route out to a router A but not router B. if there anyway we can do it?

thanks

[Harold Ritter]

You can generate the default route with a tag as suggested in my previous posting and then filter it on router B as follow:

router ospf 1

distribute-list route-map matchTag in

route-map matchTag deny 10

match tag 1234

!

route-map matchTag permit 20

!

Note that the route will be in router B LSDB but not in the routing table.

Thanks for rating this posting,

[phamthecong]

Totally agree. My troublle is however that router B is Alcatel router which I have a little knowledge about. Can Alcatel gears filter routes based on tag value?

regards,