01-08-2006 03:49 AM - edited 03-03-2019 11:23 AM
i configured frame-relay end-to-end keepalive between two routers (3841 & 2620XM) but when the subinterface on 2620 router go down the other side (3841) go down but after 1 minut back up... i need to to know why the interface back up?????
01-08-2006 06:48 AM
Hi Friend,
If I understand you correctly your interface on the other end comes up once the interface on this side comes up after going down right ?
If yes this is the functionality of keepalives. Once the intrerface comes up after going down it again starts sending the keepalives and once the other end receives the kepalives it comes to know that the interface on the remote end is up now so it also comes up.
The interface on remote side goes down because it did not receives the keepalives but once it start receiving the keepalives it comes up again.
HTH
Ankur
01-08-2006 08:42 AM
Hello,
as I understand the problem, the interface on the 3841 comes back up one minute after going down, while the interface on the 2620 stays down, that is, while the circuit has not been reestablished, is that correct ?
Can you post the EEK configs from both sides ?
Also, which IOS version are you running on both routers ?
Regards,
GP
01-08-2006 10:04 AM
Hello,
one minute sounds like LMI is kicking in and still reporting the PVC as up from the provider side (status reports are sent every 60 sec.).
Infact FR end-to-end keepalives should still allow the detection of an end-to-end failure.
As a workaround for the time being you could use a dynamic routing protocol over the PVC, which will for sure detect any connectivity issue.
Hope this helps
Martin
01-11-2006 10:49 PM
2600 SIDE
Configuration
interface Serial0/0.1 point-to-point
ip address 192.168.4.2 255.255.255.0
no ip route-cache
no ip mroute-cache
no cdp enable
frame-relay class ecb
frame-relay interface-dlci 16
map-class frame-relay ecb
frame-relay end-to-end keepalive mode reply
IOS Version 12.3(5e)
3800 SIDE
Configuration
interface Serial0/0/0.5 point-to-point
ip address 192.168.4.1 255.255.255.0
no ip route-cache
no ip mroute-cache
no cdp enable
frame-relay class ecb
frame-relay interface-dlci 19
map-class frame-relay ecb
frame-relay end-to-end keepalive mode bidirectional
IOS Version 12.4(2)T
01-11-2006 11:41 PM
Hello,
you could modify the configuration on the 2600 to utilize bidirectional end-to-end keepalives.
So both routers will actively test the PVC.
Still the config you have in place should actually do what you intend to do. But as we are looking for a solution to this "non default behaviour", trying a slightly different config might help.
Can you please post the output of "show frame-relay end-to-end keepalive interface Serial xxx" for both routers. This way one can see, whether end-to-end keeplives are sent/received and which errors are occuring.
Hope this helps! Please rate all posts.
Martin
01-17-2006 09:02 AM
Martin is on the right track.
I am refreshing my knowledge on frame-relay and noticed this comment in the configuration guide.
You must configure both ends of a VC to send keepalives. If one end is configured as bidirectional, the other end must also be configured as bidirectional. If one end is configured as request, the other end must be configured as reply or passive-reply. If one end is configured as reply or passive-reply, the other end must be configured as request
You have a mismatch in your configuration.
Hope this helps!Please rate all posts.
Sarb
03-28-2006 05:14 AM
Network Infrastructure
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WAN, Routing and Switching: frame-relay end-to-end keepalive
Posted by: ayoussef82 - Jan 8, 2006, 3:49am PST
i configured frame-relay end-to-end keepalive between two routers (3841 & 2620XM) but when the subinterface on 2620 router go down the other side (3841) go down but after 1 minut back up... i need to to know why the interface back up?????
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Replied by: ankurbhasin - Senior System Engineer, Lucent Technologies - Jan 8, 2006, 6:48am PST
Hi Friend,
If I understand you correctly your interface on the other end comes up once the interface on this side comes up after going down right ?
If yes this is the functionality of keepalives. Once the intrerface comes up after going down it again starts sending the keepalives and once the other end receives the kepalives it comes to know that the interface on the remote end is up now so it also comes up.
The interface on remote side goes down because it did not receives the keepalives but once it start receiving the keepalives it comes up again.
HTH
Ankur
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Replied by: gpauwen - Systems Engineer, Fujitsu Services BV - Jan 8, 2006, 8:42am PST
Hello,
as I understand the problem, the interface on the 3841 comes back up one minute after going down, while the interface on the 2620 stays down, that is, while the circuit has not been reestablished, is that correct ?
Can you post the EEK configs from both sides ?
Also, which IOS version are you running on both routers ?
Regards,
GP
| E-Mail this Message
Rating: 2.0 (1 vote)
Rate this Post
Replied by: mheusinger - , Global Knowledge Deutschland, CCIE - Jan 8, 2006, 10:04am PST
Hello,
one minute sounds like LMI is kicking in and still reporting the PVC as up from the provider side (status reports are sent every 60 sec.).
Infact FR end-to-end keepalives should still allow the detection of an end-to-end failure.
As a workaround for the time being you could use a dynamic routing protocol over the PVC, which will for sure detect any connectivity issue.
Hope this helps
Martin
| E-Mail this Message
Rating: 2.0 (1 vote)
Rate this Post
Replied by: ayoussef82 - Jan 11, 2006, 10:49pm PST
2600 SIDE
Configuration
interface Serial0/0.1 point-to-point
ip address 192.168.4.2 255.255.255.0
no ip route-cache
no ip mroute-cache
no cdp enable
frame-relay class ecb
frame-relay interface-dlci 16
map-class frame-relay ecb
frame-relay end-to-end keepalive mode reply
IOS Version 12.3(5e)
3800 SIDE
Configuration
interface Serial0/0/0.5 point-to-point
ip address 192.168.4.1 255.255.255.0
no ip route-cache
no ip mroute-cache
no cdp enable
frame-relay class ecb
frame-relay interface-dlci 19
map-class frame-relay ecb
frame-relay end-to-end keepalive mode bidirectional
IOS Version 12.4(2)T
03-28-2006 06:58 AM
I am puzzled why you have posted the content of this old discussion. It seems that you had a problem and that a reasonable explanation of the problem was provided. I do not see anything new about this. What would you want us to do?
HTH
Rick
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