Per its IpAddress syntax, this reports the local interface's IP address through which this Permanent Tunnel's traffic is routed, differing from the regular tunnelInterface object which is a name string rather than an address. This lets an admin confirm exactly which local IP or interface an always-on link is bound to, important for verifying the tunnel didn't silently shift to a different local interface after a network change. Example: permanentTunnelInterface reporting an IP belonging to a secondary uplink, when the design called for the primary uplink, indicates the always-on tunnel has moved to a path that wasn't originally intended.