System information

Using Router Diagnostic Commands
Book Title
2-8
— show interfaces fddi
— show interfaces atm
— show interfaces serial
— show controllers—This command displays statistics for interface card controllers. For
example, the show controllers mci command provides the following fields:
MCI 0, controller type 1.1, microcode version 1.8
128 Kbytes of main memory, 4 Kbytes cache memory
22 system TX buffers, largest buffer size 1520
Restarts: 0 line down, 0 hung output, 0 controller error
Interface 0 is Ethernet0, station address 0000.0c00.d4a6
15 total RX buffers, 11 buffer TX queue limit, buffer size 1520
Transmitter delay is 0 microseconds
Interface 1 is Serial0, electrical interface is V.35 DTE
15 total RX buffers, 11 buffer TX queue limit, buffer size 1520
Transmitter delay is 0 microseconds
High speed synchronous serial interface
Interface 2 is Ethernet1, station address aa00.0400.3be4
15 total RX buffers, 11 buffer TX queue limit, buffer size 1520
Transmitter delay is 0 microseconds
Interface 3 is Serial1, electrical interface is V.35 DCE
15 total RX buffers, 11 buffer TX queue limit, buffer size 1520
Transmitter delay is 0 microseconds
High speed synchronous serial interface
Some of the most frequently used show controllers commands include the following:
— show controllers token
— show controllers FDDI
— show controllers LEX
— show controllers ethernet
— show controllers E1
— show controllers MCI
— show controllers cxbus
— show controllers t1
— show running-config— Displays the router configuration currently running
— show startup-config—Displays the router configuration stored in nonvolatile RAM
(NVRAM)
— show flash—Group of commands that display the layout and contents of flash memory
— show buffers—Displays statistics for the buffer pools on the router
— show memory—Shows statistics about the router’s memory, including free pool statistics
— show processes—Displays information about the active processes on the router
— show stacks—Displays information about the stack utilization of processes and interrupt
routines, as well as the reason for the last system reboot
— show version—Displays the configuration of the system hardware, the software version, the
names and sources of configuration files, and the boot images
There are hundreds of other show commands available. For details on using and interpreting the
output of specific show commands, refer to the Cisco Internetwork Operating System (IOS)
command references.