Sorry if I am misunderstanding your diagram. Where do you think the loop
should appear?

Routes originating on R8 would appear as connected, and therefore not be
overwritten by redistribution, Same on R7.

I guess I am just not seeing what the topology is or where you think the
break should be.


""paul dong so""  wrote in message
news:[EMAIL PROTECTED]
> Hi All,
>
> Practicing redistribution.
>
> (route) - r8 - (eigrp) - r7 - ospf- r6
> |     |
> ------- eigrp --------
>
> 150.50.3.0/24 is redistributed by r8 eigrp, r8 advertises it to r7 via
> eigrp. R7 redistributes eigrp to ospf, also redistribute ospf to eigrp.
> On r7, ospf database has type 5 LSA for 150.50.3.0/24, AD 110. eigrp
> topology has EX route, AD 170. But r7 routing table use eigrp learned
> path for forwarding. Why? I was expecting a loop. When will a loop
created?
>
> r6 learns the route from ospf and eigrp, it use ospf as the forwarding
> path, which is expected.
>
> Partial router config:
>
> r8:
> interface Ethernet0
>   ip address 150.50.3.8 255.255.255.0
> router eigrp 1
>   redistribute connected
>   no auto-summary
>
> r8#sh ip route | i 150.50.3.0
> C       150.50.3.0/24 is directly connected, Ethernet0
>
> r7:
> router eigrp 1
>   redistribute ospf 1 metric 56 100 255 1 1500
> router ospf 1
>   redistribute eigrp 1 metric-type 1 subnets
>
> r7#sh ip route | i 150.50.3
> D EX    150.50.3.0/24 [170/46251776] via 150.50.5.69, 01:40:13, Serial4/1
> r7#sh ip ospf database | i 150.50.3
> Type-5 AS External Link States
> 150.50.3.0      200.0.0.7       796         0x80000003 0x00186A 1
>
> r7#sh ip route 150.50.3.0
> Routing entry for 150.50.3.0/24
>    Known via "eigrp 1", distance 170, metric 46251776, type external
>    Redistributing via ospf 1, eigrp 1
>    Advertised by ospf 1 metric-type 1 subnets tag 1
>    Last update from 150.50.5.69 on Serial4/1, 01:44:46 ago
>    Routing Descriptor Blocks:
>    * 150.50.5.69, from 150.50.5.69, 01:44:46 ago, via Serial4/1
>        Route metric is 46251776, traffic share count is 1
>        Total delay is 21000 microseconds, minimum bandwidth is 56 Kbit
>        Reliability 255/255, minimum MTU 1500 bytes
>        Loading 1/255, Hops 1
>
> r6
> r6#sh ip route | i 150.50.3.0
> O E1    150.50.3.0/24 [110/30] via 150.50.7.7, 01:19:53, Ethernet0
> r6#sh ip ospf database
> Type-5 AS External Link States
> 150.50.3.0      200.0.0.7       927         0x80000003 0x186A   1
>
>
> Thanks
>
> Paul




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