Description of the problem

The Huawei OSN350 N2PQ1 single board's outgoing V5 is (0x04) byte synchronization, which fails. The network management reports illegal V5 overhead with error code 38809. set:cfg-set-stv5:4,1,4 by command, and the error is reported: failed! cmd:0x8275 error:0x9799 NSERR_CFG_BAD_V5. host version is: 5.21.18.50P01.

Alert message

V5 overhead illegal with error code 38809

failed! cmd:0x8275 error:0x9799 NSERR_CFG_BAD_V5

Processing

1. The OSN product branch board supports V5 byte settings as follows:

Single board type Supported V5 overhead

ssn1pq1/ssn1pd1/ssn1pqm/ssr1pd1/ssr1pl1 000/010

ssn2pq1/ssr2pd1 000/010/011

SSN1PD3/SSN1PL3/SSN1PL3A Not Supported

ssn2pq3/ssn2pd3/ssn2pl3/ssn2pl3a 000/010/011

Corresponding host command behavior :cfg-set-stv5:4,0 //Parameters that can be set are 0,2,3

2. The host provides the command to modify the V5 transmit byte arbitrarily, but this command is only used for testing and prohibited to be used in the current network.

First turn on the Set Send Overhead Byte switch:

#9-3521:gtac123 [][][2011-08-18 19:40:30+08:00]>

:cfg-set-tohenable:4,enable //Enable send overhead setting, corresponding to the OTP command as :OTP:4,00,9b,01,08,94,01, this command is stored in the library, and it will be reissued by the host after the single board soft/hard reset.

#9-3521:gtac123 [][][2011-08-18 19:43:52+08:00]>

:cfg-get-tohenable:4

TOH-ENABLE-STATE

Bid TOH-ENABLE

4 enable

Total records :1

#9-3521:gtac123 [][][2011-08-18 19:43:57+08:00]>

:cfg-set-tpoh:4,1,vc12,v5,8 //Set the V5 value sent to 8 (0x1000) bytes synchronized floating mode. Note that the V5 value is set here. This command does not store the library and is cleared after a soft/hard reset of the single board. The corresponding optp command is :optp:4,00,9b,01,1a,5a,01,0b,8

#9-3521:gtac123 [][][2011-08-18 19:44:51+08:00]>

:cfg-get-tpoh:4,1,vc12,v5

TU-TPOH

Bid Pid XcLevel PohType Value

4 1 vc12 v5 8

Total records :1

Once set, the peer receives V5 as a (0x04) byte synchronized float.

Root Cause

The OSN3500 SSN2PQ1A tributary single board does not support this overhead setting.

The lower three bits of V5, bits 2,3,4, for a total of eight binary values indicate the net load loading condition and mapping method.

000 Unequipped VC channel

001 VC channel equipped, but no payload specified

010 Asynchronous float mapping

011 Bit synchronous float

100 Byte Synchronous Float

101 Reserved

110 O.181 Test Signal

111 VC-AIS

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