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Webcast-Catalyst9k
New Member

loopback not set - in serial port

Hello,

If i view "sh int serial" as below, notice that loopback not set. Is this loopback option useful only in wicg703 type card with inbuilt DSU? Or is it useful in normal sync serail ports such as v.35 etc

home#sh int se 0

Serial0 is administratively down, line protocol is down

Hardware is HD64570

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, loopback not set

3 REPLIES

Re: loopback not set - in serial port

Hi

Yes , its also useful in normal sync serial ports for giving a local loop to itself and check if the local interface is fine.

Hope this helps

regards

vanesh k

New Member

Re: loopback not set - in serial port

Vanesh,

thanks. But when i enable the loopback on a v.35 serial port, i see that loopback is set.But the interface never came up...any pointers on how to use loopback on v.35 will be greatly helpful.

Regds

Jay

Re: loopback not set - in serial port

Hi

Can u enable the same command in any other free interface and check , might be the interface might have problem.

also , pls post the interface config with loopback set

regards

vanesh k

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