In IPv4, Class C networks are typically used for smaller networks. The default subnet mask for a Class C network is 255.255.255.0, which allows for 256 IP addresses in total, with 254 usable host IPs (the first address is the network address, and the last is the broadcast address).
Class C networks have the first three octets (the first 24 bits) dedicated to the network portion, and the last octet (8 bits) available for host addresses, hence the subnet mask 255.255.255.0.

The LLDP neighbor information shows the neighbor's port VLAN ID as 1, which indicates the untagged (native) VLAN on the peer port is VLAN 1.

The Spanning Tree Protocol (STP) is used to prevent loops in a network by designating one active path and blocking redundant paths. If a switch port is up but no traffic is being forwarded, it's likely that the port is in a blocking state due to STP. This means that STP has determined that the port is part of a redundant path and has blocked it to avoid network loops.

Static route failover occurs only when the preferred static route is removed from the routing table.
If the next hop 10.1.251.2 remains reachable at Layer 2/Layer 3 on the local link, the switch keeps the primary default route installed even if there is an upstream failure, so the secondary route is not selected until the primary route is no longer present in the routing table.

The show logging command on an Aruba switch is used to display the system logs and event messages. These logs typically include information about the switch's operation, errors, system events, warnings, and other messages related to the switch's performance and health. This command helps administrators monitor and troubleshoot the switch.