Method used to release a board loopback

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On the NMS, when the Auto Disabling parameter is set to Disabled for a board loopback, the loopback will be released within the configured Auto Disabling Time.
If the automatic release function is disabled, release the loopback on the NMS.

Other related questions:
Constraints on loopbacks of the TN53ND2 board
A loopback on the TN53ND2 board can apply only to service granularities received from the backplane side. For example, ODU0 granularities received from the backplane side can be looped back, but ODU1 granularities multiplexed from ODU0 granularities cannot be looped back on the TN53ND2 board.

Constraints on loopbacks of the TN53NS2 board
A loopback on the TN53NS2 board can apply only to service granularities received from the backplane side. For example, ODU0 granularities received from the backplane side can be looped back, but ODU1 granularities multiplexed from ODU0 granularities cannot be looped back on the TN53NS2 board.

Method used to configure the USG firewall to release an IP address allocated by DHCP to the PC
On the USG2000, USG5000, and USG6000, you can release the IP address allocated by DHCP to the PC using the following commands: Clear address 10.110.1.1 reset dhcp server ip-in-use ip 10.110.1.1 The commands can clear both expired and valid address binding information.

Does the U1900 series unified gateway support loopback test
Method of performing the loopback test for the E1 line on the U1900: - Physically connect a pair of tx and rx ports of the E1 line, and obseve the RFA indicator and LOS indicator on the U1900. If they are both off, the local loopback test is successfully.

Constraints on loopbacks of the TN53NQ2 board
A loopback on the TN53NQ2 board can apply only to service granularities received from the backplane side. For example, ODU0 granularities received from the backplane side can be looped back, but ODU1 granularities multiplexed from ODU0 granularities cannot be looped back on the TN53NQ2 board.

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