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Hi
DCD - Data Carrier Detect
DSR - Data Set Ready
DTR - Data Terminal Ready
RTS - Request to Send
CTS - Clear To Send
These reflect the status of the connected CSU/DSU. When
say DCD is down, then most probably the line between the 2 CSU's is down.
This is the way these indications can help.
Hope this helps
Geoffrey
----- Original Message -----
Sent: Monday, November 13, 2000 12:14
PM
Subject: What is DCD, DSR, DTR, RTS &
CTS ?
Hello guys, I have one question regarding show interface serial.
When we type show interface serial, we will get the output as stated below.
The question is what are DCD, DSR, DTR, RTS & CTS ? How this 5 indicators
can help us for troubleshooting purposes?
Thank in advance
syam
router#sh int s1
Serial1 is up, line protocol is up
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load
1/255
Encapsulation FRAME-RELAY IETF, loopback not set, keepalive set (10
sec)
LMI enq sent 19075, LMI stat recvd 19074, LMI upd recvd 0, DTE LMI
up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE
Broadcast queue 0/64, broadcasts sent/dropped 49968/0, interface
broadcasts 0
Last input 00:00:01, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 1/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/18/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 16000 bits/sec, 2 packets/sec
5 minute output rate 4000 bits/sec, 2 packets/sec
999755 packets input, 370609737 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
932796 packets output, 265560428 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
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