Fractional Rate Line Dropping Intermittently

Question

Hi There,
we have recently moved buildings and before our move we were running video conferencing across two pri links. We had multilink configured and were allowing a max of 10 links to come up. Everything worked well and the quality was good.
Since we moved, the remote site is the same but our new site has a fractional rate line instead of a pri. We have configured things the same as before and it works fine except the connections drops after 10 minutes. I have posted my config below, but I cannot determime see anything which is forcing the link to drop.
we have not changed the configs on the Polycom Video Conferencing units either, so I don't think it should be anything there. Has anyone come across this problem before ?
Thanks
Rob.
Router 1: (Pri Line):
interface Serial1/0:15
no ip address
encapsulation ppp
dialer pool-member 1
dialer pool-member 2
isdn switch-type primary-net5
isdn overlap-receiving
ppp authentication pap chap callin
ppp multilink
interface Dialer9
description *** Dialer for Video Conferencing ***
ip address 172.20.16.2 255.255.255.0
encapsulation ppp
no ip mroute-cache
dialer pool 1
dialer remote-name Router2
dialer idle-timeout 800
dialer string 0035312456789
dialer load-threshold 2 either
dialer-group 9
fair-queue 64 16 0
no cdp enable
ppp authentication chap
ppp chap hostname Router1
ppp chap password notworking
ppp multilink
ppp multilink links maximum 10
ppp multilink links minimum 2
ip route 10.30.12.0 0.0.0.255 Dialer 9
Router 2 Fractional Rate)
interface Serial2/0:15
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type primary-net5
ppp authentication chap
ppp multilink
interface Dialer1
description *** Dialer for Video Conferencing ***
ip address 10.30.12.1 255.255.255.0
encapsulation ppp
no ip mroute-cache
dialer pool 1
dialer remote-name Router1
dialer idle-timeout 800
dialer string 012345678
dialer load-threshold 2 either
dialer max-call 10
dialer-group 2
fair-queue
no cdp enable
ppp authentication chap
ppp chap hostname Router2
ppp chap password notworking
ppp multilink
ppp multilink links maximum 10
ppp multilink links minimum 2
ip route 172.20.16.0 0.0.0.255 dialer1

Answer 1

Hi there,
I enclose Show Controllers E1 for both routers below. I was doing more testing yesterday and although the video conference session fails. The line is not dropping. I looked at the output of the show ppp multilink and there was still 3 lines up. Despite the fact the video conference session had ended. I looked through the config options on the video conference boxes, but I could not see anything that would cause the session to drop after 11 minutes. It makes no difference which site we initiate the video con session from, it still fails after 11 minutes. I removed the dialer load threshold command as I could see ther load was dropping during the call and though the line was falling because of this, but as I say I don't believe the line is dropping.
Thanks
Router 1:
E1 1/0 is up.
Applique type is Channelized E1 - balanced
Far End Block Errors Detected
No alarms detected.
alarm-trigger is not set
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (93 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Router 2:
E1 2/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (538 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs