No power

[isaac modikwe]

Hi On my 3900 Router

my port seen to be shutting themselfs off, they are connected antenna 

can someone help

[Reza Sharifi]

What type of antenna?

have you tried no sh under the interface?

what is the output of "sh ip int xx?"

[isaac modikwe]

Hi I mean i'm conecting two building and I have a Microwave antenna connecting the two builings, I'm running a site to  site vpn between the two. when I try the "sh ip int br " it sh the interface as up but it doesn't allow for traffic to pass