Cisco Tips & Tricks

May 3, 2006

Tunneling

Filed under: Uncategorized — ciscotips @ 4:46 pm

Whenever a Generic Routing Encapsulation (GRE) tunnel is formed, the tunnel interface shows status UP in show interface tunnel<no>, but actually the tunnel is not active.You need to manually do a “no shutdown”in the tunnel interface.One can also view the tunnel status in show interface summary or show ip interface brief.

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