•
Serial x is up, line protocol is down
•
Serial x is up, line protocol is up (looped)
•
Serial x is up, line protocol is down (disabled)
•
Serial x is administratively down, line protocol is down
The following example shows the interface statistics on the first port of a 4-Port Clear Channel T3/E3 SPA
installed in subslot 0 of the SIP located in chassis slot 5:
Router# show interfaces serial
Serial5/0/0 is up, line protocol is up
Hardware is SPA-4T3E3
Internet address is 110.1.1.2/24
MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,
reliability 255/255, txload 234/255, rxload 234/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Last input 00:00:05, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 40685000 bits/sec, 115624 packets/sec
5 minute output rate 40685000 bits/sec, 115627 packets/sec
4653081241 packets input, 204735493724 bytes, 0 no buffer
Received 4044 broadcasts (0 IP multicast)
0 runts, 0 giants, 0 throttles
0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
4652915555 packets output, 204728203520 bytes, 0 underruns
0 output errors, 0 applique, 4 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
The following table shows the interface status conditions, possible problems associated with the conditions,
and solutions to those problems.
Table 28: Serial Lines: show interfaces serial Status Line Conditions
SolutionPossible ProblemStatus Line Condition
This is the proper status line
condition. No action is required.
—
Serial x is up, line protocol is up
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17 325
Troubleshooting the Serial SPAs
Serial Lines: show interfaces serial Status Line Conditions
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