From: Carlos Trujillo (carlos.trujillo.jimenez@gmail.com)
Date: Mon Mar 24 2008 - 09:44:12 ART
Noor.
Once you redistribute both routing protocols things work fine, but once you
also redist a connected interface into any of both routing protocols you may
have reachability issues in one or both of the routing domains, specifically
the problem would be: "missing a route(s) of the connected interface(s) of
the redistribution router in the routing table of some OSPF ONLY ROUTER or
some EIGRP ONLY ROUTER.
When you redistribute a connected link using a route-map matching a
interface or a prefix-list as in your example, you are limiting the redist
of only that connected inteface "CONNECTED INTERFACE" I try to mean that of
ALL CONNECTED INTERFACES (those running a routing protocol and those not
running at all a routing protocol) of all them, redistribute only one
interface into a given routing protocol.
In you example As a result when you add the second redistribution: a
CONNECTED LINK into OSPF limiting only one interface with a route-map, you
are excluding all other interfaces to be redistributed into that routing
protocol (The router DOES NOT CARE if all other interfaces are running any
of the routing protocols initially redistributed like EIGRP interface in
your example).
So to Again enable full reachability in your example, you must add a second
statement to your existing route-map matching the eigrp interface.
2008/3/24, Noor.Yousuf@shell.com <Noor.Yousuf@shell.com>:
>
> Experts,
>
> Quick question for all of you
>
> Connected interface(G0/1)---R2------ospf over FR-----R3
> |
> |
> EIGRP(G0/0)----R5
>
> When I use simple mutual redistribution b/w OSPF and EIGRP, it does work
> fine, as soon as I try to redistribute connected interface into OSPF which
> is not part of any routing protocol through Route-map, my EIGRP network gets
> drop on R3....any thoughts will be appreciated
>
> Here is the config of R2
>
> interface GigabitEthernet0/0
> ip address 16.16.17.2 255.255.255.0
> duplex auto
> speed auto
> !
> interface GigabitEthernet0/1
> ip address 150.5.16.1 255.255.255.0
> duplex auto
> speed auto
> !
> interface Serial0/0/0
> ip address 16.16.12.2 255.255.255.248
> encapsulation frame-relay
> ip ospf priority 0
> frame-relay map ip 16.16.12.3 413 broadcast
> frame-relay map ip 16.16.12.5 413 broadcast
> no frame-relay inverse-arp
> frame-relay lmi-type cisco
>
> router eigrp 16
> redistribute ospf 1 metric 1500 1 255 1 1500
> network 16.16.17.2 0.0.0.0
> no auto-summary
> !
> router ospf 1
> router-id 2.2.2.2
> log-adjacency-changes
> redistribute connected metric 100 subnets route-map bb2
> redistribute eigrp 16 metric 50 subnets
> network 2.2.2.2 0.0.0.0 area 0
> network 16.16.12.2 0.0.0.0 area 0
> !
> ip prefix-list bb2 seq 5 permit 150.5.16.0/24
>
> route-map bb2 permit 10
> match ip address prefix-list bb2
>
> Thanks,
>
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