06-25-2008 11:02 AM - edited 03-05-2019 11:49 PM
Hello,
I am trying to create a HSRP route reachability on a Catalyst 3750 version IP Services 12.2(44)SE2.
The route is present in the routing table but the tracking object is down :
Switch#show track 3
Track 3
IP route 192.168.252.49 255.255.255.255 reachability
Reachability is Down (no route)
1 change, last change 00:05:32
First-hop interface is unknown
Switch#show IP route 192.168.252.49 255.255.255.255
Routing entry for 192.168.252.49/32
Known via "ospf 1", distance 110, metric 2, type intra area
Last update from 192.168.252.9 on Port-channel1, 00:20:58 ago
Routing Descriptor Blocks:
* 192.168.252.9, from 192.168.252.49, 00:20:58 ago, via Port-channel1
Route metric is 2, traffic share count is 1
Here is the only command I used (and i used on routers):
track 3 ip route 192.168.252.49 255.255.255.255 reachability
Any ideas ?
Thanks by advance !
06-25-2008 09:49 PM
Hi ,
Can you paste the config.
192.168.252.49 is learning through port channel . Am i right.
Tks,
Satish
06-25-2008 10:37 PM
Yes i am learning 192.168.252.49 through the Po1.
192.168.252.49 is also the loopback of the ospf adjacent router.
which part of the config do you want me to paste ?
06-25-2008 10:49 PM
The config relevant to HSRP.
-Ashok.
06-25-2008 10:53 PM
HSRP Config:
interface Vlan4
ip address 172.18.1.2 255.255.0.0
ip pim sparse-dense-mode
standby 4 ip 172.18.1.1
standby 4 timers msec 300 1
standby 4 priority 250
standby 4 preempt delay minimum 60
standby 4 authentication md5 key-string *****
standby 4 track 3 decrement 30
end
06-25-2008 11:02 PM
Hi ,
Reachability is Down (no route) showing no route means there is no static route on the switch.
Track coomand will be used whenever you have routes configured on the switch or router itself.
Tks,
satish
06-26-2008 03:31 AM
You are wrong, Satish.
Track IP route feature is not limited to static routes. It just needs reachability.
See the following example...
CE-1#sh track 5
Track 5
IP route 150.1.1.0 255.255.255.0 reachability
Reachability is Up (OSPF)
1 change, last change 00:10:15
First-hop interface is FastEthernet0/0
Tracked by:
HSRP FastEthernet0/1 1
CE-1#
CE-1#sh ip ro 150.1.1.0
Routing entry for 150.1.1.0/24
Known via "ospf 10", distance 110, metric 20, type extern 2, forward metric 1
Last update from 70.1.1.2 on FastEthernet0/0, 00:12:45 ago
Routing Descriptor Blocks:
* 70.1.1.2, from 70.1.1.2, 00:12:45 ago, via FastEthernet0/0
Route metric is 20, traffic share count is 1
CE-1#
Coming back to original problem, it's giving first hop interface is unknown eventhough Port-channel is active. Can you please try the same track command (without applying to the interface) with different IP route with via any other interface than Port channel on the same router. Then, check with "sh track" command. If that tracking works fine, then it should some tuning might need to be done for port channel interface. You can try debugging of tracking events with "debug standby events track detail" command.
Regards...
-Ashok.
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