06-10-2012 09:58 PM - edited 03-04-2019 04:38 PM
hi all ,
According to my given scenario (attached) backup link will become (cellular) active once the main link goes down.
But My requiement is to backup link must remain active for some time (5 minutes) eventhough the main link comes up
again.This should prevent the link flapping.
please provide me a way to achive this. Your replies using expertise knowledge highly appriciate.
Thanks
Solved! Go to Solution.
06-11-2012 10:28 PM
Hi Harsha,
You got it perfect...
It will simply delay track status to go UP ( for 180 seconds) and go DOWN ( for 10 seconds).
HTH,
Smitesh
PS: Please rate helpful posts...
06-10-2012 10:51 PM
Hi Harsha,
Can you provide sanitise config...
HTH,
Smitesh
06-11-2012 04:55 AM
hi ,
here are my current configuration.
cellular 0/0/0 gsm profile create 1 *******
chat-script gsm "" "***** " TIMEOUT 30 "CONNECT"
interface FastEthernet0/1
ip address 172.1.1.1 255.255.255.0
int se 0/1/0
ip address 192.168.1.2 255.255.255.252
interface Cellular0/1/0
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer idle-timeout 30 either
dialer string gsm
dialer-group 1
async mode interactive
ppp chap hostname *****
ppp chap password 7 ********
ppp ipcp dns request
ip route 0.0.0.0 0.0.0.0 serial 0/1/0 track 1
ip route 0.0.0.0 0.0.0.0 Cellular0/1/0 10
ip sla 1
icmp-echo 192.168.1.1
frequency 10
ip sla schedule 1 life forever start-time now
track 1 ip sla 1 reachability
access-list 1 permit any
dialer-list 1 protocol ip list 1
line 0/0/0
script dialer gsm
06-11-2012 05:27 AM
Hi Harsha,
Under track command, there is delay option where you can provide delay upto 180 seconds ( might be more in newer IOS)...
HTH,
Smitesh
PS: Please rate if helpful....
06-11-2012 10:01 PM
hi smitesh,
Thanks for your reply.I found some configurations.
track 1 ip sla 1 reachability
delay down 10 up 180
using this once the sla goes down it will remain 10 seconds for the notiying the router as sla down. Once it come back up again it will remain 180 seconds to notifying the router sla up again.
Am I correct ? I think using this I can mitigate the link flapping.
Thanks
06-11-2012 10:28 PM
Hi Harsha,
You got it perfect...
It will simply delay track status to go UP ( for 180 seconds) and go DOWN ( for 10 seconds).
HTH,
Smitesh
PS: Please rate helpful posts...
06-12-2012 09:54 PM
hi smitesh,
I found the solution for me. This work for me.
track 1 ip sla 1 reachability
delay down 10 up 180
Thanks for you reply.
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