Chinese
English
This content describesthe phenomenon, the impact on the system, the possible causes, thetools needed totroubleshoot thefault, the precautions, and the processing steps whenthe OSN3500Ethernetservice is interrupted or packet lossfault.AnEthernetservicefailureresults inEthernetservice interruption, packet loss, or packet error, and may also affect other services accessed by the device.
The HP_TIM alarm is generated for both Ethernet veneer EGT2 and EFS0 when the value of the J1 byte due to send and due to receive in the high-order channel overhead is the same. This issue can be resolved by manually setting the J1 byte due to send and the J1 byte due to receive.
Products
OptiX OSN 3500
Fault Category
- Ethernet Fault
- HP_TIM
Phenomenon Description
When configuring Ethernet services, the values of J1 bytes due to send and due to receive in the high-order channel overhead are the same, but Ethernet veneer boards EGT2 and EFS0 both generate HP_TIM alarms.
Cause Analysis
After the Ethernet service is configured, the Ethernet boards at both ends generate HP_TIM alarms. Check the J1 byte in single-byte mode in the overhead management interface of the T2000, and the J1 byte of receivable and transmittable are the same (you need to select the hexadecimal display). If you expand the J1 byte to 16 bytes, you find that the values are different. If you change the transmit value of one Ethernet board, the receive value of the other board is unchanged.
Operation Procedure
- Set the J1 value to be received by the RX Ethernet board in VC-4 on the SDH line board of the TX Ethernet board. the HP_TIM alarm disappears.
Reference message
The J1 value receivable by the RX Ethernet board should be set in VC-4 on the SDH line board of the TX Ethernet board. Change the transmit and receivable values on the SDH path to avoid HP_TIM alarms on the line.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. (www.opticaltrans.com), and are reprinted with permission. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to call!
