From: eltawil@free.fr
Date: Fri Oct 08 2004 - 11:22:50 GMT-3
David,
You can conditionally set the attached bit using the command "set-attached-bit
<route-map>" The route map is used the same way you use a route map to
conditionally advertise a default route with the "default-information
originate".
Hope this helps,
Cheers,
Sameh
Selon "Hoonpongsimanont, Chalermchai"
<chalermchai.hoonpongsimanont@atosorigin.com>:
> Hi Folks,
>
>
>
> I have a problem when trying to filter default route on ISIS Level 1 router.
>
>
>
>
> R5 (L1) --- R7 (L1/L2)
>
>
>
> On R5,
>
>
>
> r5#show isis database
>
>
>
> IS-IS Level-1 Link State Database:
>
> LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
>
> r5.00-00 * 0x00000009 0xC158 661 0/0/0
>
> r7.00-00 0x0000000F 0x8FC3 1192 1/0/0 <-
> ATT Set to 1
>
> r7.01-00 0x00000005 0x1E9A 660 0/0/0
>
>
>
> r5#sh ip route isis
>
> 150.50.0.0/16 is variably subnetted, 19 subnets, 3 masks
>
> i L1 150.50.60.0/24 [115/20] via 150.50.50.7, FastEthernet0/0
>
> i ia 150.50.4.0/24 [115/158] via 150.50.50.7, FastEthernet0/0
>
> i ia 150.50.8.8/32 [115/148] via 150.50.50.7, FastEthernet0/0
>
> i L1 150.50.7.7/32 [115/10] via 150.50.50.7, FastEthernet0/0
>
> i L1 150.50.101.0/30 [115/20] via 150.50.50.7, FastEthernet0/0
>
> i*L1 0.0.0.0/0 [115/10] via 150.50.50.7, FastEthernet0/0
>
>
>
> R7 Configuration
>
> !
>
> router isis
>
> net 47.0007.7777.7777.7777.00
>
> redistribute isis ip level-2 into level-1 distribute-list 100
>
> passive-interface Loopback0
>
> !
>
>
>
> I don't want this default route to show up on R5. The only one way I found
> is configuring hidden command "never-set-attached-bit" under router isis of
> R7, and it's working fine.
>
>
>
> R7 Configuration
>
> !
>
> router isis
>
> net 47.0007.7777.7777.7777.00
>
> never-set-attached-bit
>
> redistribute isis ip level-2 into level-1 distribute-list 100
>
> passive-interface Loopback0
>
> !
>
>
>
> On R5,
>
> r5#show isis database
>
>
>
> IS-IS Level-1 Link State Database:
>
> LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
>
> r5.00-00 * 0x00000009 0xC158 431 0/0/0
>
> r7.00-00 0x00000010 0x85D4 1153 0/0/0 <-
> ATT Set to 0
>
> r7.01-00 0x00000006 0x1C9B 1166 0/0/0
>
> r5#show ip route isis
>
> 150.50.0.0/16 is variably subnetted, 19 subnets, 3 masks
>
> i L1 150.50.60.0/24 [115/20] via 150.50.50.7, FastEthernet0/0
>
> i ia 150.50.4.0/24 [115/158] via 150.50.50.7, FastEthernet0/0
>
> i ia 150.50.8.8/32 [115/148] via 150.50.50.7, FastEthernet0/0
>
> i L1 150.50.7.7/32 [115/10] via 150.50.50.7, FastEthernet0/0
>
> i L1 150.50.101.0/30 [115/20] via 150.50.50.7, FastEthernet0/0
>
> <- Default route is gone ->
>
>
>
> I don't think I will get the point when using hidden command in real lab. Is
> there any other way to do this kind of thing? Thanks in advance.
>
>
>
> Cheers,
>
> David
>
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