Cisco EF4116 Hardware Installation And Maintenance Manual page 46

Network Connection Considerations
The field underrun, in the output of the show interface command, may be nonzero in approximately
one of 250,000 packets.
To display the current internal status of an interface module, use the show controller command with
the interface unit options. (Note in the example that universal serial means the four port
serial module.) The following example shows the output of the show controller serial 2 command:
Note that in the previous example, the cable type is shown as no cable. If a cable is attached to the
port, the cable type would be shown, as in the following example:
If the cable is DCE, the output of the show controller command displays the clock rate. For
complete command descriptions and instructions, refer to the appropriate software publications.
2-24 Cisco 4000 Series Hardware Installation and Maintenance
router> show interface s 0
Serial 0 is up, line protocol is up
Hardware is HD64570
Internet address is 193.195.74.236, subnet mask is 255.255.255.248
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive not set
Last input 0:00:01, output 0:00:10, output hang never
Last clearing of "show interface" counters never
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
Five minute input rate 0 bits/sec, 0 packets/sec
Five minute output rate 0 bits/sec, 0 packets/sec
2922 packets input, 5844 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
145 packets output, 185562 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets, 0 restarts
880 carrier transitions
router# show controller s 2
HD unit 2, idb 0x246AAC, ds 0x248240
buffer size 2108 Universal Serial: No cable
DCD=0 DSR=0 DTR=0 RTS=0
cpb = 0x4, eda = 0xDA18, cda = 0xD798
RX ring with 32 entries at 0x604D798
00 bd_ptr=0xD798 pak=0x604E728 ds=0x604E87C status=80 pak_size=0
01 bd_ptr=0xD7AC pak=0x604EEAC ds=0x604F000 status=80 pak_size=0
02 bd_ptr=0xD7C0 pak=0x604F630 ds=0x604F784 status=80 pak_size=0
(some screen output deleted)
32 bd_ptr=0xDA18 pak=0x605D7A8 ds=0x605D8FC status=80 pak_size=0
cpb = 0x4, eda = 0xE1E0, cda = 0xE1E0
TX ring with 8 entries at 0x604E1E0
00 bd_ptr=0xE1E0 pak=0x000000 ds=0x000000 status=80 pak_size=0
01 bd_ptr=0xE1F4 pak=0x000000 ds=0x000000 status=80 pak_size=0
02 bd_ptr=0xE208 pak=0x000000 ds=0x000000 status=80 pak_size=0
03 bd_ptr=0xE21C pak=0x000000 ds=0x000000 status=80 pak_size=0
04 bd_ptr=0xE230 pak=0x000000 ds=0x000000 status=80 pak_size=0
05 bd_ptr=0xE244 pak=0x000000 ds=0x000000 status=80 pak_size=0
06 bd_ptr=0xE258 pak=0x000000 ds=0x000000 status=80 pak_size=0
07 bd_ptr=0xE26C pak=0x000000 ds=0x000000 status=80 pak_size=0
08 bd_ptr=0xE280 pak=0x000000 ds=0x000000 status=80 pak_size=0
0 missed datagrams, 0 overruns, 0 bad frame addresses
0 bad datagram encapsulations, 0 memory errors
0 transmitter underruns
buffer size 2108 Universal Serial: DTE V.24 (RS-232) cable
CTS=0