🚀 go-pugleaf

I am stumped.

We have several locations connected to an AGS+ via serial connections
to a public X.25 "cloud" (tcp/ip over the cloud ).  We are running
8.3(3).

Problem:

When pinging the remote router (over the x.25 link ) with data size of
999, I get no reply's.  Any other size up to 1500 works just fine.
Well, not exactly fine but it does work.  When data sizes are greater
than 999 reply times go up by a factor of 3 and we get much larger
data loss.  While I am no fan of X.25, this does sound slightly 
worse than usual.

The MTU on the link is 1500 bytes.

Here is the seriall interface info on our side:

Serial 3 is up, line protocol is up 
  Hardware is MCI Serial
  Internet address is  subnet mask is 
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation X25, loopback not set
  LAPB state is CONNECT, T1 3000, N1 12040, N2 20, K 7
      VS 4, VR 1, RCNT 0, Remote VR 4, Retransmissions 0
      IFRAMEs 603669/409567 RNRs 0/0 REJs 0/2 SABMs 882/5 FRMRs 0/3 DISCs 0/8
  X25 address 331080201171, state R1, modulo 8, idle 5, timer 0, nvc 1
      Window size: input 7, output 7, Packet size: input 512, output 512
      Timers: T20 180 T21 200 T22 180 T23 180 TH 0
      Channels: Incoming 1-32 Two-way 1-32 Outgoing 1-32
      RESTARTs 20/5 CALLs 47213+47188/53+7/0+0 DIAGs 0/0
  Last input 0:00:00, output 0:00:00, output hang never
  Last clearing of "show interface" counters never
  Output queue 0/40, 2907 drops; input queue 0/75, 0 drops
  Five minute input rate 1000 bits/sec, 1 packets/sec
  Five minute output rate 0 bits/sec, 0 packets/sec
     1008126 packets input, 54751069 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 7 giants
     647678 input errors, 647419 CRC, 647530 frame, 0 overrun, 0 ignored, 121 abort
     974996 packets output, 123878239 bytes, 0 underruns
     0 output errors, 0 collisions, 221 interface resets, 0 restarts
     11 carrier transitions


-- 
Jim Ray                                Harris Semiconductor
Internet:  jdr@semi.harris.com         PO Box 883   MS 62B-022
Phone:     (407) 729-5059              Melbourne, FL  32901