Which interval is used when the intervals for sending and receiving packets are different between two ends of the BFD on the AR router

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When the intervals for sending and receiving packets are different, the BFD session negotiation will be established. The larger interval will be used. Actual packet transmission interval = max (local min-tx-interval, remote min-rx-interval) Actual period for receiving packets = max (local min-rx-interval, remote min-tx-interval).

Other related questions:
Which interval is used if packets on the two ends of a BFD session are transmitted and received in different intervals
When the two ends of a BFD session have different intervals for transmitting and receiving packets, negotiation is performed between the two ends of the BFD session. The longer interval is used. Actual transmit interval = max (min-tx-interval on the local end, min-rx-interval on the peer end). Actual receive interval = max (min-rx-interval on the local end, min-tx-interval on the peer end).

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.

Does an AR send and receive packets through different paths
An AR cannot send and receive packets through different paths, because packets sent from the AR can be controlled while packets received from carriers cannot be controlled.

What is the BFD default detecting interval?
1000 milliseconds.

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