It means simply that you line provider has been testing the line between
your site and their exchange or CO. They send a signal down and it is looped
back so they can verify the line is good. In order for the line to work as
far as you are concerned you must call them and get them to take the test
loop off the line. The (Looped) will then disappear and you should have end
to end connectivity.
Sim, CT (Chee Tong) wrote:
>
> I was informed that there is a loop in our interface, and it is
> not up.
> When I do a sh interface, I found it is up but there is a word
> (looped) as
> shown below. What is the meaning??? What happen ?? When I
> show cdp
> neighbor, I see the cdp neighbor of the interface is the router
> itself??
> Why???
>
> sin03>sh int s1/0
> Serial1/0 is up, line protocol is up (looped)
>
> sin03>sh cdp nei
> Capability Codes: R - Router, T - Trans Bridge, B - Source
> Route Bridge
> S - Switch, H - Host, I - IGMP, r - Repeater
>
> Device ID Local Intrfce Holdtme Capability
> Platform Port ID
> sin03 Ser 1/0 136 R
> c3660 Ser 1/0
> TYO02 Ser 1/1 154 R
> 1750 Ser 0
> HKG01 Ser 1/2 167 R
> 1750 Ser 0
> SYD02 Ser 2/1 157 R
> 1750 Ser 0
>
>
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