After HSB is configured, the HSB channel fails to be established and cannot back up information on the active device to the standby device. What are the possible causes for this HSB function failure?
A.
The TCP channel is not established.
B.
The retransmission count and interval for HSB service packets are different on the two devices.
C.
The two ACs have the same priority.
D.
The source IP address and port number of the local end are different from the destination IP address and port number of the remote end.
High-availability Stateful Backup (HSB) ensures synchronization between active and standby devices. If the HSB channel fails to establish, the following causes are possible:
TCP channel not established: The HSB channel relies on a TCP connection. If the TCP session cannot be established, the backup process cannot start.
Mismatched retransmission settings: If the retransmission count and interval for HSB service packets are inconsistent between the two devices, the synchronization process fails.
Incorrect source and destination configurations: If the source IP address and port number on one device do not match the destination IP address and port number on the other, the channel cannot be established.
Option C is incorrect because the priority of the two ACs affects active/standby roles but does not directly impact HSB channel establishment .
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