O'Reilly logo

Cisco IOS Cookbook, 2nd Edition by Ian Brown, Kevin Dooley

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Viewing SDLC Status Information

Problem

You want to check the status of an SDLC device on your router.

Solution

You can get a lot of useful SDLC information simply by looking at the interface:

Router>show int serial1 Serial1 is up, line protocol is up Hardware is HD64570 Description: Connection to three remote SDLC devices MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation SDLC, loopback not set Router link station role: PRIMARY (DCE) Router link station metrics: slow-poll 30 seconds T1 (reply time out) 3000 milliseconds N1 (max frame size) 12016 bits N2 (retry count) 20 poll-pause-timer 200 milliseconds poll-limit-value 1 k (windowsize) 7 modulo 8 sdlc vmac: 4000.CCCC.00-- sdlc addr 20 state is CONNECT cls_state is CLS_IN_SESSION VS 0, VR 0, Remote VR 0, Current retransmit count 0 Hold queue: 0/200 IFRAMEs 5025/618 TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0 RNRs 15/2 SNRMs 0/0 DISC/RDs 0/0 REJs 0/0 Poll: clear, Poll count: 0, ready for poll, chain: 22/21 sdlc addr 21 state is CONNECT cls_state is CLS_IN_SESSION VS 0, VR 0, Remote VR 0, Current retransmit count 0 Hold queue: 0/200 IFRAMEs 127/15 TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0 RNRs 1/0 SNRMs 0/0 DISC/RDs 0/0 REJs 0/0 Poll: clear, Poll count: 0, ready for poll, chain: 20/22 sdlc addr 22 state is SNRMSENT cls_state is CLS_CONNECT_RSP_PEND VS 0, VR 0, Remote VR 0, Current retransmit count 0 Hold queue: 0/200 IFRAMEs 25/0 TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0 RNRs 0/0 SNRMs 0/0 DISC/RDs ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required