topic Re: loopback not set - in serial port in Routing and SD-WAN

loopback not set - in serial port

jay77jay77 — Sun, 03 Mar 2019 23:15:43 GMT

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

Re: loopback not set - in serial port

network.king — Fri, 05 Jan 2007 11:43:34 GMT

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

Re: loopback not set - in serial port

jay77jay77 — Mon, 08 Jan 2007 02:16:46 GMT

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

network.king — Mon, 08 Jan 2007 05:38:27 GMT

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