09-16-2010 12:24 AM - edited 03-04-2019 09:47 AM
topology : R1 - R2 - R3
R1-R2 : ospf neighbors
R2-R3 : ebgp neighbors
routes when redistributed from BGP to OSPF on R2 are being tagged, but the default-route is not getting tagged.....
any comments/experience...?
Regards,
MukarraM
Solved! Go to Solution.
09-16-2010 12:51 AM
Hello Mukarram,
The default route is not redistributed into OSPF, it is only originated into it. Even though you may be performing redistribution from BGP into OSPF, a default route cannot be redistributed into OSPF (it is a deliberate restriction in Cisco IOS). This is the reason that you do not see a tag in the default route - because it is actually not retaken from the BGP.
If you want to tag the default route originated into OSPF you have to use a route-map in the default-information originate command in your OSPF configuration to tag this route, as follows:
route-map RM-TagDefault permit 10
set tag 123
router ospf 1
default-information originate route-map RM-TagDefault
Best regards,
Peter
09-16-2010 12:51 AM
Hello Mukarram,
The default route is not redistributed into OSPF, it is only originated into it. Even though you may be performing redistribution from BGP into OSPF, a default route cannot be redistributed into OSPF (it is a deliberate restriction in Cisco IOS). This is the reason that you do not see a tag in the default route - because it is actually not retaken from the BGP.
If you want to tag the default route originated into OSPF you have to use a route-map in the default-information originate command in your OSPF configuration to tag this route, as follows:
route-map RM-TagDefault permit 10
set tag 123
router ospf 1
default-information originate route-map RM-TagDefault
Best regards,
Peter
09-16-2010 01:38 AM
thanks a lot....
09-16-2010 02:54 AM
I am tagging the routes while they are being redistributed in ospf from BGP .. so i am not expecting the routes to to carry the tag while getting redistributed...
your comment:
This is the reason that you do not see a tag in the default route - because it is actually not retaken from the BGP.
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