[Asterisk-Users] HDLC overrun, what's going on?

[Yury Bokhoncovich]

Hello, folks!

 I'm wondering what is the cause of the records shown below in the 
router's log and what's going on? I.e. how much harm it can exert and what 
is possibly the real root? I'm especially care about its periodical and
unpredictable (random?) character.:(

 The former is total records in log about one such case (typical picture), 
the latter is given for overall estimation of frequency. The card is 
E100P, equipment from the opposite side is some STM MUX and Cisco (models 
are not known to me). The channel makes use full G.703 (from 1 to 31 
slots), recently there were two logical subchannels (1 to 8 and 9 to 31 
slots respectively), common picture was the same on each subchannel.
The kernel is 2.4.21 if this matters.

================================
Mar  9 18:39:02 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar  9 18:39:32 fox kernel: hdlc0: Link down
Mar  9 18:40:02 fox kernel: hdlc0: Link up (peer uptime 27d4h49m6s)
================================
================================
Mar 10 10:53:05 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 11:31:05 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 11:53:05 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 12:23:06 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 14:55:06 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 15:49:06 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 16:27:06 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 10 16:45:06 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 11:11:10 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 16:57:11 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 17:05:11 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 17:11:11 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 18:11:11 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 11 20:45:11 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
Mar 12 11:41:14 fox kernel: HDLC Receiver overrun on channel WCT1/0/1 (master=WCT1/0/1)
================================

-- 
WBR, Yury Bokhoncovich, Senior System Administrator, NOC of F1 Group.
Phone: +7 (3832) 106228, ext.140, E-mail: byg at center-f1.ru.
Unix is like a wigwam -- no Gates, no Windows, and an Apache inside.