Tracking in a route-map

[rasmus.elmholt]

Hi

I have configured a route-map with the match track 1, but I cannot get it to work with RIP default routes.

This is my IP SLA:

ip sla 1
icmp-echo 155.1.7.7
frequency 5
ip sla schedule 1 life forever start-time now

R1#show ip sla summary
IPSLAs Latest Operation Summary
Codes: * active, ^ inactive, ~ pending

ID           Type        Destination       Stats       Return      Last
                                           (ms)        Code        Run
-----------------------------------------------------------------------
*1           icmp-echo   155.1.7.7         RTT=11      OK          4 seconds ago

I have then made a track of the IP SLA:

#track 1 ip sla 1

R1#show track
Track 1
  IP SLA 1 state
  State is Up
    1 change, last change 00:13:16
  Latest operation return code: OK
  Latest RTT (millisecs) 8
  Tracked by:
    Route Map 0

And everything is UP and seems to be working.

But my route-map and RIP default route is not working:

router rip
 version 2
 network 150.1.0.0
 network 155.1.0.0
 default-information originate route-map DG
 no auto-summary
route-map DG permit 10
 match track  1

Everything seems to be working, but when I do a debug ip rip. The default route is not sent to the neighbors.

[rishrapsody1]

Is there a default route existing on your source router?

[rasmus.elmholt]

Hi

No, there is no default route in the routing table of the source router.

Gateway of last resort is not set

      150.1.0.0/32 is subnetted, 10 subnets
C        150.1.1.1 is directly connected, Loopback0
R        150.1.2.2 [120/2] via 155.1.0.2, 00:00:10, Tunnel0
R        150.1.3.3 [120/1] via 155.1.13.3, 00:00:16, GigabitEthernet1.13
R        150.1.4.4 [120/2] via 155.1.0.4, 00:00:10, Tunnel0
R        150.1.5.5 [120/1] via 155.1.0.5, 00:00:10, Tunnel0
R        150.1.6.6 [120/1] via 155.1.146.6, 00:00:08, GigabitEthernet1.146
R        150.1.7.7 [120/2] via 155.1.146.6, 00:00:08, GigabitEthernet1.146

But if i just do the normal default-information originate the default route is sent to all the neighbors.

On a neighboring router:

Gateway of last resort is 155.1.0.1 to network 0.0.0.0

R*    0.0.0.0/0 [120/1] via 155.1.0.1, 00:00:24, Tunnel0

[paul driver]

Hello

If i remember using conditional route advertising using route map with track is some what buggy, have you tried an alternative and match on a access-list relating to the route you want to monitor.

example:

access-list 10 permit 150.1.7.7

route-map DG
match ip address 10

[rasmus.elmholt]

Hi Paul
If I do a match on an accesslist or prefix list everything works.
I made the solution to generate a dummy route that got put in the routing table when my track was UP and then sent the default RIP route whenever that dummy route was in the RIB, using a prefix list.
So I have solved the problem.

I was just wondering if this is a bug or if it simply isn't allowed to use a track in a route-map used for default route generation.

As far as I understand the default-information originate route-map <map> command it should inject a default route if the route-map return true in one of it's conditions.

[Richard Burts]

Congratulations on a creative solution to achieve your requirement. It seems more like a bug to me than an intentional policy. Perhaps someone from Cisco might provide a more authoritative answer?

HTH

Rick

[Learner09]

Sorry to bump an old post, but would you please share the work around configuration you had done. Thanks a lot

[rasmus.elmholt]

Hi @Learner09 

This is an real old post, I really can't remember how I solved it.