From which Session Border Controller node in a high availability (HA) pair, could a network administrator trigger a system switchover manually by issuing the notify berpd force command?
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A. B. C. D. E.D.
In a high availability (HA) pair of Session Border Controller (SBC) nodes, there are two nodes: the active node and the standby node. The active node is responsible for handling all network traffic, while the standby node is ready to take over if the active node fails.
The notify berpd force command is used to manually trigger a system switchover in the event of a failure or maintenance. When this command is issued, the SBC node that receives the command sends a message to the other node indicating that it should take over as the active node.
So, which SBC node can be used to issue the notify berpd force command?
Option A: Secondary only - This option suggests that only the standby node can issue the notify berpd force command. However, this is not correct because the standby node is not the one that initiates the switchover.
Option B: Active node that no longer has a heartbeat - This option suggests that the active node can issue the command only if it no longer has a heartbeat. However, this is also not correct because the active node that no longer has a heartbeat is already considered failed and cannot issue any commands.
Option C: Standby only - This option suggests that only the standby node can issue the notify berpd force command. However, as explained above, the standby node is not the one that initiates the switchover.
Option D: Active only - This option suggests that only the active node can issue the notify berpd force command. This is incorrect because the active node cannot initiate a switchover to itself.
Option E: Standby or Active - This option correctly suggests that either the active or standby node can issue the notify berpd force command to initiate the switchover process. However, it is important to note that the command should be issued from the active node to the standby node, triggering the switchover.
Therefore, the correct answer is E. Standby or Active.