Cisco RJ-45-to-AUX Brochure page 331

show flash
Cisco switches operate with software that is very similar to the Cisco IOS on routers. This software is stored
and may be upgraded in flash stored on the Supervisor module. The show flash command reports the space
required for the installed software and the version of the code, including the file names, software version
numbers, and file sizes. Unfortunately, there is no comparable command on the 1900EN series switches.
show interface
You can use the show interface command to get the IP configuration, interface flags, interface state, VLAN
information from the Supervisor Console 0 (SCO) interface, and broadcast address. This command can be
used on both the Set/Clear and CLI−based IOS.
show log
Using the show log command, you can look at significant events, including reboots of all the modules, traps,
logged events, boot history, nonvolatile RAM (NVRAM) logs, module logs, and power supply failures. This
command cannot be used on the 1900EN series switches.
show mac
The output from the show mac command is quite long. This command displays numerous counters that are
maintained during normal operation. These counters include information on the traffic for each port, number
of incoming frames, number of frame discards, total number of frames sent, and maximum transmission unit
(MTU) violations.
Note On the Cisco CLI−based IOS, use the show usage utilization command.
show port
Using the show port command, you can receive specific information about selected ports or all the ports on a
specified module. This data includes the VLANs the port belongs to, port configuration information, port
status, port speed, port duplex, port media type, security information, source MAC address of the last packet
received, broadcast threshold, number of collisions, link error rate (LER), link error monitor (LEM), last
report cleared time, and whether port trap is enabled.
Related solution:
Creating an EtherChannel on a Set/Clear
Command−Based Switch
show spantree
The use of spanning trees is a necessity in today's networks in order to provide for redundant links and at the
same time avoid a data looping problem. The show spantree command can be used to display the STP
configuration crucial to the successful running of a switched network. The output from this command can tell
you whether STP is enabled or disabled, the bridge or port priorities, the root bridge priorities, the path cost to
the root, BPDU information, the bridge MAC address, timer information, the port states, and information on
the fast−start configuration of each port. This command is similar on the Set/Clear IOS and the CLI−based
IOS.
Related solutions:
Verifying the STP Port Priority on a Set/Clear
Command−Based Switch
Verifying the VLAN Priority Settings
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