From: Joel W. Ekis (jekis@xxxxxxxxx)
Date: Fri Mar 10 2000 - 10:02:58 GMT-3
Josh,
You cannot summarize within an area. All routers in a single OSPF area must ag
ree on the exact topology of the network.
Simple answer: What you are trying cannot work.
Joel
At 09:06 AM 3/10/2000 +0800, Winston Goh Tian Keong, NS, SCS-Networks wrote:
>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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