Okay you OSPF experts - see if you can answer this!

From: CCIEin2006 (ciscocciein2006@gmail.com)
Date: Thu Jan 12 2006 - 15:11:53 GMT-3

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When configuring a NSSA with no-summary, what is the point of adding the
default-information-originate keyword?

I have tried with and without the default-information-originate keyword and
both ways originate a default route.

Example:

R2:
router ospf 1
network 141.1.0.2 0.0.0.0 area 1
area 1 nssa no-summary

SW2:

Rack1SW2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static
route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is 141.1.0.2 to network 0.0.0.0

     141.1.0.0/24 is subnetted, 3 subnets
C 141.1.8.0 is directly connected, Vlan8
C 141.1.0.0 is directly connected, Vlan258
C 141.1.88.0 is directly connected, Vlan88
     150.1.0.0/24 is subnetted, 1 subnets
C 150.1.8.0 is directly connected, Loopback0
O*IA 0.0.0.0/0 [110/2] via 141.1.0.2, 00:34:39, Vlan258
Rack1SW2#

R2:
router ospf 1
network 141.1.0.2 0.0.0.0 area 1
area 1 nssa default-information-originate no-summary

SW2:

Rack1SW2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static
route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is 141.1.0.2 to network 0.0.0.0

     141.1.0.0/24 is subnetted, 3 subnets
C 141.1.8.0 is directly connected, Vlan8
C 141.1.0.0 is directly connected, Vlan258
C 141.1.88.0 is directly connected, Vlan88
     150.1.0.0/24 is subnetted, 1 subnets
C 150.1.8.0 is directly connected, Loopback0
O*IA 0.0.0.0/0 [110/2] via 141.1.0.2, 00:34:39, Vlan258
Rack1SW2#

• Next message: Chris Lewis: "Re: Okay you OSPF experts - see if you can answer this!"
• Previous message: Mohamed, Liban [NTK]: "RE: Eid Mubarak"
• Next in thread: Chris Lewis: "Re: Okay you OSPF experts - see if you can answer this!"
• Maybe reply: Chris Lewis: "Re: Okay you OSPF experts - see if you can answer this!"
• Maybe reply: Paul Borghese: "Re: Okay you OSPF experts - see if you can answer this!"
• Maybe reply: Nick: "Re: Okay you OSPF experts - see if you can answer this!"
• Maybe reply: Jian Gu: "Re: Okay you OSPF experts - see if you can answer this!"
• Maybe reply: Paresh Khatri: "RE: Okay you OSPF experts - see if you can answer this!"
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