What are two considerations when using SSO as a network redundancy feature? (Choose two.)
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A. B. C. D. E.AC.
SSO (Stateful Switchover) is a feature in Cisco network devices that allows for redundancy and failover in case of a hardware or software failure. SSO is typically used in conjunction with NSF (Non-Stop Forwarding) to support uninterrupted Layer 2 and Layer 3 operations during a switchover.
The two considerations when using SSO as a network redundancy feature are:
Requires synchronization between supervisors in order to guarantee continuous connectivity: When using SSO, the two supervisors in the device must be synchronized to ensure that they both have the same configuration and state information. This is necessary to guarantee continuous connectivity during a switchover. If the two supervisors are not synchronized, there may be a disruption in service during a switchover.
Must be combined with NSF to support uninterrupted Layer 3 operations or Layer 2 operations: SSO alone does not support uninterrupted Layer 3 operations. Therefore, it must be combined with NSF to support Layer 3 operations during a switchover. Similarly, if the network device is configured for Layer 2 operation, SSO must be combined with NSF to support uninterrupted Layer 2 operations during a switchover.
Option B, "the multicast state is preserved during switchover," is not a consideration when using SSO. SSO does not preserve multicast state during a switchover. Instead, multicast state is preserved when NSF is combined with SSO.
Option D, "both supervisors must be configured separately," is not a consideration when using SSO. Both supervisors in the device must be configured with the same configuration and state information to ensure that they are synchronized. However, the configuration and state information is typically synchronized automatically when SSO is enabled.