Information Technology Reference
In-Depth Information
Sample Displays
The following is sample output from the
show interfaces
command for a synchronous serial interface:
Router#
show interfaces serial
Serial 0 is up, line protocol is up
Hardware is MCI Serial
Internet address is 150.136.190.203, subnet mask is 255.255.255.0
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 0:00:07, output 0:00:00, output hang 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
16263 packets input, 1347238 bytes, 0 no buffer
Received 13983 broadcasts, 0 runts, 0 giants
2 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 2 abort
1 carrier transitions
22146 packets output, 2383680 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets, 0 restarts
Table 15-9 describes significant fields shown in the output.
Table15-9 Show Interfaces Serial Field Descriptions
Field
Description
Serial...is
{
up
|
down
}
...is
administratively down
Indicates whether the interface hardware is currently
active (whether carrier detect is present) or whether it has
been taken down by an administrator.
line protocol is
{
up
|
down
}
Indicates whether the software processes that handle the
line protocol consider the line usable (that is, whether
keepalives are successful), or whether it has been taken
down by an administrator.
Hardware is
Specifies the hardware type.
Internet address is
Specifies the Internet address and subnet mask.
MTU
Specifies the maximum transmission unit of the interface.
BW
Indicates the value of the bandwidth parameter that has
been configured for the interface (in kilobits per second).
The bandwidth parameter is used to compute IGRP
metrics only. If the interface is attached to a serial line
with a line speed that does not match the default (1536 or
1544 for T1, and 56 for a standard synchronous serial
line), use the
bandwidth
command to specify the correct
line speed for this serial line.
continues
DLY
Gives the delay of the interface in microseconds.
rely
Expresses reliability of the interface as a fraction of 255
(255/255 is 100 percent reliability), calculated as an
exponential average over 5 minutes.
load
Expresses load on the interface as a fraction of 255
(255/255 is completely saturated), calculated as an
exponential average over five minutes.
Encapsulation
Gives the encapsulation method assigned to the interface.
loopback
Indicates whether loopback is set.
