Huawei V200R001C01 - Page 120

Serial1/0/0:15
U->N Len=7 00 01 7F 00 00 00
00
U->N sapi=00 tei=00 c/r=0 SABME p=1
l If the following information is displayed, SABME frames are correctly sent. Go to step 3.
<Huawei>
Oct 12 2007 11:54:42.240.1+08:00 Huawei Q921/7/Q921_Debug:
Serial1/0/0:15
U->N Len=3 00 01
7F
U->N sapi=00 tei=00 c/r=0 SABME p=1
<Huawei>
Oct 12 2007 11:54:43.240.1+08:00 Huawei Q921/7/Q921_Debug:
Serial1/0/0:15
U->N Len=3 00 01
7F
U->N sapi=00 tei=00 c/r=0 SABME p=1
<Huawei>
Oct 12 2007 11:54:44.240.1+08:00 Huawei Q921/7/Q921_Debug:
Serial1/0/0:15
U->N Len=3 00 01
7F
U->N sapi=00 tei=00 c/r=0 SABME p=1
Step 3 Check that the network-side interface sends response packets.
NOTE
After the display controller e1 command is run in the system view, if the Alarm State field is displayed
as Remote-Alarm-Indication, packets may be incorrectly sent or received on the local and remote
interfaces; if the Alarm State field is displayed as Loss-of-Frame, an error occurs when packets are sent
on the remote interface.
Run the debugging isdn q921, terminal debugging, and terminal monitor commands in
sequence to check sent packets. In the command output, N->U indicates a direction from the
network-side interface to the user-side interface. If response packets have been received from
the remote end, information is displayed following N->U.
l If the following information (only U->N information) is displayed, no response packet is
sent from the network-side interface. Check whether the network-side device is faulty.
<Huawei>
Oct 12 2007 14:28:51.430.1+08:00 Huawei Q921/7/Q921_Debug:
Serial1/0/0:15
U->N Len=3 00 01
7F
U->N sapi=00 tei=00 c/r=0 SABME p=1
<Huawei>
Oct 12 2007 14:28:52.430.1+08:00 Huawei Q921/7/
Q921_Debug:
[FUN: ISDN_Q921_T200Out, LINE: 2182] ISDN Layer 2 link state change ->
TEI_ASSIGNED
<Huawei>
Oct 12 2007 14:28:57.430.1+08:00 Huawei Q921/7/Q921_Debug:
Serial1/0/0:15
U->N Len=3 00 01
7F
U->N sapi=00 tei=00 c/r=0 SABME p=1
<Huawei>
Oct 12 2007 14:28:57.430.2+08:00 Huawei Q921/7/
Q921_Debug:
[FUN: ISDN_Q921_HandleEstablishReq, LINE: 185] ISDN Layer 2 link state change
-> AWAITING_ESTABLISHMENT
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 5 WAN
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
111