Redistributing Loopbacks into EIGRP

daniel280187daniel280187 Member Posts: 37 ■■□□□□□□□□
Hi guys,

I am trying to redistribute some routes from OSPF into EIGRP. Please see the next example:



http://postimg.org/image/pc1cztm0z/

Description:
I am trying to Redistribute Loopbacks 0 and 1 from R3 and R4 (OSPF) into EIGRP. All of the other loopbacks are being filtered with a route-map before being redistribute. Notice that they are loopbacks with /24 and as I understand OSPF advertise them as /32 routes.


Issues:
1 - When looking the routing table in R2, I can see 2 routes for 10.1.4.0 and 2 more routes for 10.1.5.0.

I am trying to understand why am I receiving these 2 extra /24 routes for these loopbacks?. Should not I receive just one /32 route for each Loopback as it is the case for the routes originated by R3?



2 - Additionally I cannot see and Type 1 LSA being generated in OSPF for those Loopbacks. I can see type 5 instead for some of the routes which makes me think it might be an issue with these loopbacks being redistributed back into OSPF.



http://postimg.org/image/ahp10i19z/14035d83/

Thanks in advance for your comments to shed some light on this.

Comments

  • Node ManNode Man Member Posts: 668 ■■■□□□□□□□
    Hi Daniel,
    Just shooting from the hip. Maybe try 'redistributing connected routes' will work.
  • daniel280187daniel280187 Member Posts: 37 ■■□□□□□□□□
    Don't think so Node Man, thanks for the suggestion though. I mean, the routes are being redistributed into EIGRP, the issue is that I am getting routes that I think should not being received (/24 routes). You can notice in the first image that R2 (EIGRP) gets the Loopbacks from OSPF.
  • DPGDPG Member Posts: 780 ■■■■■□□□□□
    redistribute connected subnets ?

  • james43026james43026 Member Posts: 303
    Are you doing mutual redistribution? Are both R1 and R4 doing redistribution? And from which routing domain to which routing domain on each router?
  • daniel280187daniel280187 Member Posts: 37 ■■□□□□□□□□
    james43026 wrote: »
    Are you doing mutual redistribution? Are both R1 and R4 doing redistribution? And from which routing domain to which routing domain on each router?

    Hi, yes they are both (R1 and R4) doing mutual redistribution from OSPF 1 to EIGRP 100 and viceversa. I will be trying tomorrow to tag the routes as they are redistributed and then filter those tags in the opposite direction.


    Hi DPG
    The following is the config for R4 (Quite similar to R1)


    !INTERFACES CONF
    configure terminal
    interface serial 0/1
    description ### OSPF AREA 0 ###
    ip address 172.16.1.2 255.255.255.252
    no shutdown
    interface fastethernet 0/0
    description ### EIGRP 100 ###
    ip address 172.16.21.4 255.255.255.0
    no shutdown
    interface loopback 0
    ip address 10.1.4.1 255.255.255.0
    no shutdown
    interface loopback 1
    ip address 10.1.5.1 255.255.255.0
    no shutdown
    interface loopback 2
    ip address 10.1.6.1 255.255.255.0
    no shutdown
    interface loopback 3
    ip address 10.1.7.1 255.255.255.0
    no shutdown
    exit
    !
    !OSPF_ROUTING_CONF
    router ospf 1
    router-id 4.4.4.4
    passive-interface default
    no passive-interface serial 0/1
    area 0 authentication message-digest
    network 172.16.1.0 0.0.0.3 area 0
    network 10.1.0.0 0.0.255.255 area 0
    exit
    !OSPF Cost, Authentication and Hello Timers
    interface serial 0/1
    ip ospf hello-interval 8
    ip ospf dead-interval 32
    ip ospf message-digest-key 1 md5 blabla
    exit

    !EIGRP_ROUTING_CONF
    router eigrp 100
    no auto-summary
    passive-interface default
    no passive-interface fastethernet 0/0
    network 172.16.21.0 0.0.0.255
    exit


    !REDIST_INTO_EIGRP
    router eigrp 100
    redistribute ospf 1 metric 10000 10 200 5 1500
    exit


    !REDIST_INTO_OSPF
    router ospf 1
    redistribute eigrp 100 subnets
    exit


    !FILTERING_ROUTES
    access-list 10 permit 10.1.0.0 0.0.1.255
    access-list 10 permit 10.1.4.0 0.0.0.255
    access-list 10 permit 10.1.5.0 0.0.0.255

    access-list 20 permit 10.1.8.0 0.0.0.255
    access-list 20 permit 10.1.9.0 0.0.0.255

    route-map INTO_OSPF permit 70
    match ip address 20
    exit

    route-map INTO_EIGRP permit 80
    match ip address 10
    set metric 10000 10 200 5 1500
    exit


    router ospf 1
    redistribute eigrp 100 subnets route-map INTO_OSPF
    exit
    router eigrp 100
    redistribute ospf 1 route-map INTO_EIGRP
    exit
  • james43026james43026 Member Posts: 303
    It appears to me that you have a redistribution loop. Can you post the running config for R1?
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