для Cisco Cisco IOS Software Release 12.4(11)T

To verify your configuration, use the show interfaces tunnel command in privileged EXEC mode. The 
following example shows that the tunnel transport is routed using a subset of the routing table by 
specifying the outgoing interface of the tunnel transport.

Router# show running-config interface tunnel 0

Building configuration...

Current configuration : 147 bytes

!

interface Tunnel0

 ip unnumbered Loopback0

 tunnel source Loopback0

 tunnel destination 10.73.0.102

 tunnel route-via Ethernet0 preferred

end

Router# show interfaces tunnel 0 | include route-via

  Tunnel route-via feature is on [Ethernet0, preferred]

To troubleshoot your configuration, use the debug tunnel route-via command in privileged EXEC 
mode. The following is sample output from the debug tunnel route-via command after the tunnel 
route-via command was used to route the tunnel transport explicitly using a subset of the routing table.

Router# debug tunnel route-via

Tunnel route-via debugging is on

Router#

*May 23 08:40:53.707: TUN-VIA: Tunnel0 candidate route-via Ethernet0/0, next hop 10.73.2.1

*May 23 08:40:53.707: TUN-VIA: Tunnel0 route-via action is forward

*May 23 08:41:03.719: TUN-VIA: Tunnel0 candidate route-via Ethernet0/0, next hop 10.73.2.1

*May 23 08:41:03.719: TUN-VIA: Tunnel0 route-via action is forward

Router# undebug tunnel route-via

Tunnel route-via debugging is off

The following sections provide references related to the Tunnel Route Selection feature.

Implementing tunnels

“Implementing Tunnels” chapter in the 

, Release 12.4T

Interface and hardware component commands: t1 
through yellow