topic Re: Frame Relay End-to-End in Routing and SD-WAN

Frame Relay End-to-End

a.hajhamad — Mon, 04 Mar 2019 03:17:34 GMT

Hi,

I'm configuring End-to-End keepalive for two frame relay ends.

The config at the both ends as follows:

map-class frame-relay test

frame-relay end-to-end keepalive mode bidirectional

interface serial 0/0/0

frame-relay class test

HDQ-R2#show frame-relay end-to-end keepalive

End-to-end Keepalive Statistics for Interface Serial0/0/0 (Frame Relay DTE)

DLCI = 108, DLCI USAGE = LOCAL, VC STATUS = ACTIVE (EEK UP)

SEND SIDE STATISTICS

Send Sequence Number: 21, Receive Sequence Number: 22

Configured Event Window: 3, Configured Error Threshold: 2

Total Observed Events: 24, Total Observed Errors: 0

Monitored Events: 3, Monitored Errors: 0

Successive Successes: 3, End-to-end VC Status: UP

RECEIVE SIDE STATISTICS

Send Sequence Number: 21, Receive Sequence Number: 20

Configured Event Window: 3, Configured Error Threshold: 2

Total Observed Events: 23, Total Observed Errors: 0

Monitored Events: 3, Monitored Errors: 0

Successive Successes: 3, End-to-end VC Status: UP

My question, when i shutdown one of the both ends, the other end interface status is still UP UP, why?

Thanks in advance

Abd Alqader

Re: Frame Relay End-to-End

bangkydotnet — Tue, 23 Oct 2007 09:40:22 GMT

--edit: sorry posted in wrong thread, please delete this post--

Re: Frame Relay End-to-End

Kevin Dorrell — Tue, 23 Oct 2007 09:47:58 GMT

Did you set it up at both ends? If one end is birdirectional, then the other end must be too. The symtom you are describing sounds as if you have bidirectional on this end and passive-reply at the other end.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hwan_r/wan_f1h.htm#wp1072196

Also, I presume these DLCI are on the physical interface, and the frame-relay class is also on the physical.

Kevin Dorrell

Luxembourg

Re: Frame Relay End-to-End

a.hajhamad — Tue, 23 Oct 2007 10:01:51 GMT

Hi,

The ends are with bidirectional.

interface Serial0/0/0

ip address 192.168.1.122 255.255.255.252

encapsulation frame-relay

frame-relay class test

frame-relay interface-dlci 108

frame-relay lmi-type ansi

end

map-class frame-relay test

frame-relay end-to-end keepalive mode bidirectional

The other end:

interface Serial0/0/0.108 point-to-point

ip address 192.168.1.121 255.255.255.252

frame-relay class test

frame-relay interface-dlci 108

load-interval 30

end

map-class frame-relay test

frame-relay end-to-end keepalive mode bidirectional

One of the two ends is not a physical interface. Does is it work?

Re: Frame Relay End-to-End

Nagendra Kumar Nainar — Tue, 23 Oct 2007 10:36:03 GMT

Hi,

The above mentioned config will work fine without any issue.

Regards,

Nagendra

Re: Frame Relay End-to-End

a.hajhamad — Tue, 23 Oct 2007 10:39:44 GMT

Hi,

Why when one of the two ends is down, the other end stills UP, UP?

Thanks in advance

Abd Alqader

Re: Frame Relay End-to-End

paolo bevilacqua — Tue, 23 Oct 2007 10:55:28 GMT

Please configure the end that is using main interface, with a subinterface just like the other one.

Hope this helps, please rate post if it does!

Re: Frame Relay End-to-End

Kevin Dorrell — Tue, 23 Oct 2007 11:44:22 GMT

When end A is down, end B is still up.

If end B is down, is end A still up?

If you get diffreent results in different directions, which end is which?

Kevin Dorrell

Luxembourg

Re: Frame Relay End-to-End

a.hajhamad — Sat, 27 Oct 2007 06:52:01 GMT

Hi Kevin,

Yes, when A is shut down, B is still UP. and vise versa!

By the way, i solved this issue by enabling the dynamic routing protocol btw. the two ends EIGRP. and route the traffic to loop back interface "advertsied" to the other end.

But if you have any comments about keep alive it will be helpful since i need also to know what is the problem

Thanks in advance

Abd Alqader

Re: Frame Relay End-to-End

paolo bevilacqua — Sat, 27 Oct 2007 07:45:01 GMT

As I mentioned before, please use only point-to-point subinterface to configure this feature.

Re: Frame Relay End-to-End

a.hajhamad — Sat, 27 Oct 2007 07:47:58 GMT

Point-to-Point subinterfaces from the both sides?

Re: Frame Relay End-to-End

paolo bevilacqua — Sat, 27 Oct 2007 12:55:23 GMT

Yes. Beside end-to-end keepalives, you should not have one side configure on main interface (that with FR becomes multipoint implicitly).

Let us know and don't forget to rate useful posts!