This is related to the forwarding address of 0.0.0.0; check this out: https://www.cisco.com/application/pdf/paws/13682/10.pdf
It should help you fix it. Leah -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Granzer Sent: Friday, March 19, 2010 12:28 AM To: Kevin Hatem; [email protected] Subject: Re: [c-nsp] OSPF Default Route Injection Hi, I have test setup with three routers R2/R3/R4, they running OSPF, R2 and R3 injecting default with "default-information originate always metric 20", R4 already sees default route from both R4#sh ip route 0.0.0.0 Routing entry for 0.0.0.0/0, supernet Known via "ospf 2", distance 110, metric 20, candidate default path Tag 2, type extern 2, forward metric 10 Last update from 10.0.0.13 on FastEthernet0/1, 00:01:26 ago Routing Descriptor Blocks: * 10.0.0.13, from 150.0.0.3, 00:01:26 ago, via FastEthernet0/1 Route metric is 20, traffic share count is 1 Route tag 2 10.0.0.9, from 150.0.0.2, 00:01:26 ago, via FastEthernet0/0 Route metric is 20, traffic share count is 1 Route tag 2 but R2 doesn't have default route from R3 installed in routing table and vice versa. R2 and R3 sees external LSA from each other but without Routing Bit set. R3#sh ip route 0.0.0.0 % Network not in table R3#sh ip ospf data ex 0.0.0.0 OSPF Router with ID (150.0.0.3) (Process ID 2) Type-5 AS External Link States LS age: 484 Options: (No TOS-capability, DC) LS Type: AS External Link Link State ID: 0.0.0.0 (External Network Number ) Advertising Router: 150.0.0.2 LS Seq Number: 80000001 Checksum: 0xB451 Length: 36 Network Mask: /0 Metric Type: 2 (Larger than any link state path) TOS: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 2 LS age: 482 Options: (No TOS-capability, DC) LS Type: AS External Link Link State ID: 0.0.0.0 (External Network Number ) Advertising Router: 150.0.0.3 LS Seq Number: 80000001 Checksum: 0xAE56 Length: 36 Network Mask: /0 Metric Type: 2 (Larger than any link state path) TOS: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 2 Best Regards, David On Thu, Mar 18, 2010 at 6:34 PM, Kevin Hatem <[email protected]> wrote: > If two routers are injecting a default route under OSPF then each router will > retain their own default route in the route table as each other's injected > default route has the same distance as its self advertised default. You > could set a higher/lower distance on inbound advertisements from the > neighbors to influence the installation of the default route into the RIB. > > HTH > -kevin > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of David Granzer > Sent: Thursday, March 18, 2010 09:13 > To: [email protected] > Subject: [c-nsp] OSPF Default Route Injection > > Hello, > > please could someone explain what exactly command "default-information > originate always" under ospf process works ? When you have more than > one router configured with this default route injection is correct > behavior that you don't see on these routers default route in their ip > routing table from other routers and you see only external lsa for > 0.0.0.0 in ospf database ? > > Thanks, > David > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > This e-mail, including any attachments and response string, may contain > proprietary information which is confidential and may be legally privileged. > It is for the intended recipient only. If you are not the intended recipient > or transmission error has misdirected this e-mail, please notify the author > by return e-mail and delete this message and any attachment immediately. If > you are not the intended recipient you must not use, disclose, distribute, > forward, copy, print or rely on this e-mail in any way except as permitted by > the author. > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
