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New Member

Nexus 5596UP L3 OSPF Issue

I have 2 Nexus 5596UPs with a layer 3 cards that are exhibiting some very peculiar behavior.  The systems are running 5.1(3)N1(1).

I have configured 2 VRF contexts each running their own OSPF process.  There is a static gateway of last resort configured on each VRF, which is to an upstream pair of 5585X's in Active/Active.  Each OSPF process has the "default-information originate always" command configured, however, backbone neighbors are not recieving a gateway of last resort from the 5596UPs.  The applicable configurations are show below.  All other routing information is passing correctly between devices in the network.  This network is not production, it is a proof of concept for a larger implementation.

The way I understand it from all documentation is that the "default-information originate" command should distribute a default route to neighbors, as long as a  0.0.0.0/0 route exists in the routing table.  The "default-information originate always"  will distribute a default route to neighbors even if there is not a static route in the routing table.  Neither seem to be working in my case.  Anyone else seeing this behavior, or understand why it is not working as it should on the Nexus 5000 platform?

vrf context Guest

  ip route 0.0.0.0/0 xxx.xxx.11.11

vrf context Internal

  ip route 0.0.0.0/0 10.1.0.11

.

.

.

router ospf 10

  default-information originate always

  vrf Internal

router ospf 159

  default-information originate always

  vrf Guest

More configuration can be provided upon request.

Thanks in advance for your help.

Jeremy

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Nexus 5596UP L3 OSPF Issue

I think you reverse the order when you enter the command. I don't have a Nexus 5596 with L3 right now but this is what I did in a Nexus 7000:

router ospf 201

  vrf TEST

    default-information originate always

The default-information orginate always goes into the vrf not outside. Try it out and let me know.

Regards,

jerry

2 REPLIES
Cisco Employee

Nexus 5596UP L3 OSPF Issue

I think you reverse the order when you enter the command. I don't have a Nexus 5596 with L3 right now but this is what I did in a Nexus 7000:

router ospf 201

  vrf TEST

    default-information originate always

The default-information orginate always goes into the vrf not outside. Try it out and let me know.

Regards,

jerry

New Member

Nexus 5596UP L3 OSPF Issue

Yep, that was it.  It is working now, thanks for your help!

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