How to set an interval for sending LBDT packets on an S series switches and how to distinguish LBDT packets sent by different interfaces

S series (except the S1700) and E series switches send LBDT packets in the following modes:
1. For fixed switches in V100R005
- An LBDT packet is sent every 100 ms. You can run the loopback-detect interval interval-time command to set an interval for sending LBDT packets. In the command, the value of interval-time ranges from 5 to 300, in seconds. By default, the interval for sending LBDT packets is 30s.

- LBDT packets sent by different interfaces are distinguished based on protocol IDs carried in the packets. By default, the protocol ID of interface 1 on the S3700 is 0x606 and the protocol IDs of the other interfaces are incremented. You can run the loopback-detect protocol protocol-id command to manually set a protocol ID. Note that the protocol ID cannot be the same as an existing protocol ID. For details, see the command reference.
2. For fixed switches in V100R006 and later versions, modular switches, and E series switches

- An LBDT packet is sent every 5s. You can run the loopback-detect packet-interval packet-interval-time command to set an interval for sending LBDT packets. The value of packet-interval-time ranges from 1 to 300, in seconds.
- LBDT packets sent by different interfaces are distinguished based on interface indexes carried in the packets.

Note: LBDT packets are sent frequently. Therefore, the CPU usage will increase if the LBDT function is enabled on all interfaces.

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