Hi there!
This time, I will share with you a case about flood-type configuration inconsistent affects the calculation and verification of the route.
Issue Description：
There was a 10G optical layer service. After the original path was cut off, the service had been rerouted unsuccessfully：
Alarm Information：
Handling Process：
1、Check the device log and find that the last node's link cannot be used；
2、Further analysis of the ASON log reveals that the optical layer link flooding mode of the end node grid element is 0x02, the thin mode. The remaining 85 NEs are in full mode 0x01
3、Query the TE link from the first node and find that the optical fiber link (D40-)ND2) of the end node optical network element 172.16.13.10 to the grid element 172.16.10.111 does not have the remote board position optical port information.
4、After modifying the optical layer flooding mode of the end node grid element 172.16.10.111 (RM2_11) and switching the active and standby masters of the first node, the link is restored to
Root Cause：
The flood mode of the last-node NE RM2_11 on the service path is inconsistent and cannot match the link of the peer NE, which affects the calculation and verification of the route, resulting in the inability to use the preset link.
Solution：
1、Uniformly modify the flood-type into the new flood-type model (it should be revised after the upgrade is completed), and then perform a master-backup SCC switchover.
Please refer to the instructions Changing Flooding Modes for Optical-Layer Links
2、Procedure of Changing Flooding Modes for Optical-Layer Links：
Log in to an upgraded NE as a system administrator through a U2000 Remote Maintenance Client and perform the following operations:
Step 1 Run the:lim-get-och-flood-type command to query the current optical-layer link flooding mode.
If "flood-type" is 1, optical-layer links are flooded independently. If it is 2, optical-layer links in one OTU group are flooded together.
Step 2 Run the:lim-set-och-flood=type:2 command to universally flood optical-layer links that belong to the same OTU group.
Step 3 Run the:lim-get-otn-flood-type command to verify that the setting is successful.
That's all, I welcome everyone to leave a message and exchange in the comment area!
Thank you！
