From: Ivan Kuchin (ivan@iip.net)
Date: Wed Oct 19 2005 - 12:02:33 GMT-3
default-network does not affect on router it's configured. Router advertise
0.0.0.0 to other router at this routing domain. This is true for RIP.
default originate will advertise 0.0.0.0 only if 0.0.0.0 exist in routing
table for this router. "Always" force originating default route.
On Wednesday 19 October 2005 18:29, cciein2006@yahoo.com wrote:
> Hello group,
>
> Does the IP default-network command work for OSPF? When I configure it on
> my router the router creates a static summary route for the network
> specified in the default-network command but does not inject a 0.0.0.0 in
> my routing table (See example below). What good is that?
>
> Also when I use the IP default-network command in conjunction with the
> default information originate command it will not advertise a default route
> without the "always" keyword.
>
> My point is that if you have to use the "always" keyword, you don't even
> need the default-network command because a default route will be advertised
> regardless of whether a default route is in your routing table.
>
> Any thoughts?
>
>
> dental_ho#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> dental_ho(config)#
> dental_ho(config)#ip default-network 128.10.1.0
> dental_ho(config)#
> 1d02h: %SYS-5-CONFIG_I: Configured from console by console
> dental_ho#show ip route
> Codes: C - connected, S - static, I - IGRP, 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 not set <--- NO DEFAULT SET!!!
>
> 172.16.0.0/16 is variably subnetted, 4 subnets, 3 masks
> O IA 172.16.10.0/28 [110/74] via 172.16.1.1, 1d00h, Serial2/1.1
> [110/74] via 172.16.1.6, 1d00h, Serial2/1.1
> C 172.16.2.4/30 is directly connected, Serial2/1.2
> C 172.16.1.0/24 is directly connected, Serial2/1.1
> O 172.16.3.0/24 [110/65] via 172.16.2.6, 1d00h, Serial2/1.2
> 128.10.0.0/16 is variably subnetted, 2 subnets, 2 masks
> S 128.10.0.0/16 [1/0] via 128.10.1.0 <---WHAT GOOD IS THIS?!?
> C 128.10.1.0/24 is directly connected, Ethernet0/0
> dental_ho#
>
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-- iWAN kU^IN (mail to: ivan@iip.net) NOC iip.net 137-31-04
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