(PM) Retrains causing ~13 second 'hang'?

Ryan Cashin (ryan-lists@southland.net)
Wed, 5 Nov 1997 17:30:00 -0800

I have a customer playing quake (i know)... says it hangs every once in a
while. Turns out there is a ~13 sec hang everytime his connect retrains.

Normal?
Any way to turn off retrains?
Shouldn't trans/receive rate change after retrain?
Is 12 retrains in 30 minutes excessive? Is that caused by noise in the line?
This caller retrains every 2-3 minutes but I have another connection on for
26 hrs with 16 retrains... normal?

thanks,
ryan

Command> sh m17
State: ACTIVE
Active Port: S17
Transmit Rate: 46000
Receive Rate: 24000
Connection Type: LAPM/V42BIS
Chars Sent: 13257743
Chars Received: 2084603
Retrains: 6

64 bytes from 208.128.32.27: icmp_seq=151 ttl=31 time=150.3 ms
64 bytes from 208.128.32.27: icmp_seq=152 ttl=31 time=138.8 ms
64 bytes from 208.128.32.27: icmp_seq=153 ttl=31 time=13809.1 ms
64 bytes from 208.128.32.27: icmp_seq=154 ttl=31 time=12894.4 ms
64 bytes from 208.128.32.27: icmp_seq=155 ttl=31 time=12137.3 ms
64 bytes from 208.128.32.27: icmp_seq=156 ttl=31 time=11359.0 ms
64 bytes from 208.128.32.27: icmp_seq=157 ttl=31 time=10631.9 ms
64 bytes from 208.128.32.27: icmp_seq=158 ttl=31 time=9783.4 ms
64 bytes from 208.128.32.27: icmp_seq=159 ttl=31 time=8834.5 ms
64 bytes from 208.128.32.27: icmp_seq=160 ttl=31 time=7879.7 ms
64 bytes from 208.128.32.27: icmp_seq=166 ttl=31 time=1933.8 ms
64 bytes from 208.128.32.27: icmp_seq=167 ttl=31 time=1034.2 ms
64 bytes from 208.128.32.27: icmp_seq=168 ttl=31 time=151.9 ms

Command> sh m17
State: ACTIVE
Active Port: S17
Transmit Rate: 46000
Receive Rate: 24000
Connection Type: LAPM/V42BIS
Chars Sent: 13273732
Chars Received: 2100557
Retrains: 7

64 bytes from 208.128.32.27: icmp_seq=343 ttl=31 time=156.2 ms
64 bytes from 208.128.32.27: icmp_seq=344 ttl=31 time=167.6 ms
64 bytes from 208.128.32.27: icmp_seq=345 ttl=31 time=13913.8 ms
64 bytes from 208.128.32.27: icmp_seq=346 ttl=31 time=12999.4 ms
64 bytes from 208.128.32.27: icmp_seq=347 ttl=31 time=12415.9 ms
64 bytes from 208.128.32.27: icmp_seq=348 ttl=31 time=11600.2 ms
64 bytes from 208.128.32.27: icmp_seq=349 ttl=31 time=10849.4 ms
64 bytes from 208.128.32.27: icmp_seq=350 ttl=31 time=10172.0 ms
64 bytes from 208.128.32.27: icmp_seq=351 ttl=31 time=9439.5 ms
64 bytes from 208.128.32.27: icmp_seq=352 ttl=31 time=8762.5 ms
64 bytes from 208.128.32.27: icmp_seq=358 ttl=31 time=2810.3 ms
64 bytes from 208.128.32.27: icmp_seq=359 ttl=31 time=1895.5 ms
64 bytes from 208.128.32.27: icmp_seq=360 ttl=31 time=1030.8 ms
64 bytes from 208.128.32.27: icmp_seq=361 ttl=31 time=313.0 ms
64 bytes from 208.128.32.27: icmp_seq=362 ttl=31 time=149.4 ms

Command> sh m17
State: ACTIVE
Active Port: S17
Transmit Rate: 46000
Receive Rate: 24000
Connection Type: LAPM/V42BIS
Chars Sent: 13769377
Chars Received: 2524587
Retrains: 8

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