From: Winston Goh Tian Keong, NS, SCS-Networks (wgohtk@xxxxxxxxxxxxxxxxxxxxxx)
Date: Thu Mar 09 2000 - 22:06:30 GMT-3
Hi Josh,
summary-address command is only applicable if router is a ASBR. It is for
summarizing external route of another AS. Area-range command is apply when
router is a ABR. It is for summarizing route between areas. cheers
winston
> ----------
> From: josh@mstates.com[SMTP:josh@mstates.com]
> Reply To: josh@mstates.com
> Sent: Friday, March 10, 2000 8:30 AM
> To: 'Ron Panus'; ccielab@groupstudy.com
> Subject: RE: OSPF inter-area summarization
>
> I added the summary-address command to the config and this is not working
> inside a single area. Check out my config below:
>
> topology: r4 --- r5 (connected with ethernet)
>
> r4:
> !
> interface Loopback0
> ip address 10.4.252.1 255.255.255.0
> !
> interface Loopback1
> ip address 10.4.253.1 255.255.255.0
> !
> interface Loopback2
> ip address 10.4.254.1 255.255.255.0
> !
> interface Loopback3
> ip address 10.4.255.1 255.255.255.0
> !
> interface Ethernet0
> ip address 10.5.241.2 255.255.255.0
> !
> router ospf 100
> summary-address 10.4.252.0 255.255.252.0
> network 10.4.24.0 0.0.0.255 area 0
> network 10.4.252.0 0.0.3.255 area 0
>
> r5:
> !
> interface Ethernet0
> ip address 10.5.241.1 255.255.255.0
> !
> router ospf 100
> network 10.4.24.0 0.0.0.255 area 0
> network 10.5.240.0 0.0.0.3 area 0
> network 10.5.252.0 0.0.3.255 area 0
> !
>
>
> r5#sh 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, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 1.0.0.0/24 is subnetted, 1 subnets
> O 1.1.1.0 [110/1690] via 10.4.24.1, 00:04:04, Serial0
> 5.0.0.0/32 is subnetted, 1 subnets
> C 5.5.5.5 is directly connected, Loopback5
> 10.0.0.0/8 is variably subnetted, 24 subnets, 4 masks
> S 10.10.10.10/32 is directly connected, Tunnel0
> C 10.4.24.0/24 is directly connected, Serial0
> O 10.4.24.1/32 [110/64] via 10.4.24.1, 00:04:04, Serial0
> O 10.4.24.10/32 [110/128] via 10.4.24.1, 00:04:04, Serial0
> O 10.6.253.1/32 [110/11] via 10.5.240.2, 00:04:04, Ethernet1
> O 10.4.255.1/32 [110/65] via 10.4.24.1, 00:04:04, Serial0
> C 10.5.255.0/24 is directly connected, Loopback0
> O 10.6.252.1/32 [110/11] via 10.5.240.2, 00:04:05, Ethernet1
> O 10.4.254.1/32 [110/65] via 10.4.24.1, 00:04:05, Serial0
> C 10.5.254.0/24 is directly connected, Loopback3
> O 10.6.255.1/32 [110/11] via 10.5.240.2, 00:04:05, Ethernet1
> O 10.4.253.1/32 [110/65] via 10.4.24.1, 00:04:05, Serial0
> C 10.5.253.0/24 is directly connected, Loopback2
> O 10.6.254.1/32 [110/11] via 10.5.240.2, 00:04:05, Ethernet1
> O 10.4.252.1/32 [110/65] via 10.4.24.1, 00:04:05, Serial0
> C 10.5.252.0/24 is directly connected, Loopback1
> O IA 10.1.252.0/22 [110/193] via 10.4.24.1, 00:04:05, Serial0
> O IA 10.1.240.0/24 [110/192] via 10.4.24.1, 00:04:05, Serial0
> O 10.10.253.1/32 [110/129] via 10.4.24.1, 00:04:05, Serial0
> O 10.10.252.1/32 [110/129] via 10.4.24.1, 00:04:05, Serial0
> O 10.10.255.1/32 [110/129] via 10.4.24.1, 00:04:05, Serial0
> C 10.5.241.0/24 is directly connected, Ethernet0
> O 10.10.254.1/32 [110/129] via 10.4.24.1, 00:04:05, Serial0
> C 10.5.240.0/30 is directly connected, Ethernet1
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Ron Panus
> Sent: Friday, March 10, 2000 1:15 AM
> To: ccielab@groupstudy.com
> Subject: Re: OSPF inter-area summarization
>
>
> Josh,
>
> Between areas you would use the area # range command to summarize routes
> learned from an external route source. To summarize a group of contiguous
> networks within an area, you use the summary-address command under ospf.
> This command allows you to summarize several networks into one
> advertisment.
> I hope this helps.
>
>
>
> >From: josh@mstates.com
> >Reply-To: josh@mstates.com
> >To: <ccielab@groupstudy.com>
> >Subject: OSPF inter-area summarization
> >Date: Thu, 9 Mar 2000 12:42:51 -0700
> >
> >In a large OSPF network with one area, is it possible to summarize inside
> >the same area between peers? Please advise.
> >
> >Josh
> >
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