Hi All,
I have a 2MB leased line (UK Megastream) line between two sites.
One site has a 3640, the other a 2621.
The line is presented as G703 both ends.
I have PDA DC2020 G703 to X21 converters at both ends.
so connection is:
SITE A
Cisco 3640 (WIC-1T)
PDA DC2020 X21 to G703 Converter
Megastream box (CSU/DSU)
Carriers network
Megastream Box (CSU/DSU)
PDA DC2020 X21 to G703 Converter
Cisco 2621 (WIC-1T)
When I do local and remote loopback tests, using extended pings, there
are no errors. This is true from both ends.
As soon as I take the line off loopback, the activity light on the
2621 goes crazy, and I get about 500 input errors per second on one
end, and about 300 or so per second on the other end.
Keepalives are incrementing, I have tried invert txclock, although
probably didn't need to.
Here is a sh int from each end, ip addresses changed:
2621 end:
>sh int s0/0
Serial0/0 is up, line protocol is up
Hardware is PowerQUICC Serial
Description: xxxxxxxxxxxxxxxx
Internet address is 10.10.10.2/30
MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
reliability 157/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:08, output 00:00:00, output hang never
Last clearing of "show interface" counters 17:21:37
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
7055 packets input, 433584 bytes, 0 no buffer
Received 7055 broadcasts, 0 runts, 0 giants, 0 throttles
30613034 input errors, 4438685 CRC, 26174345 frame, 0 overrun, 0
ignored, 4
abort
8850 packets output, 838333 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
3640 end:
>sh int s0/0
Serial0/0 is up, line protocol is up
Hardware is QUICC Serial
Description: xxxxxxxxxxxxxxxxxxxx
Internet address is 10.10.10.1/30
MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec, rely 161/255, load
1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 17:22:15
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
8485 packets input, 778380 bytes, 0 no buffer
Received 7961 broadcasts, 0 runts, 0 giants, 0 throttles
18292244 input errors, 5169 CRC, 18287064 frame, 0 overrun, 0
ignored, 11 a
bort
7324 packets output, 462192 bytes, 0 underruns
0 output errors, 0 collisions, 10 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Carrier (NTL) say that line is fine. Remote loopback test sort of
point to this as being true (to my limited knowledge).
Any assistance greatly appreciated.
Cheers,
Symon
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=21647&t=21647
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