Dealing with an err-disabled port
I experienced a problem with a Cisco switch periodically putting one
port in an
err-disabled state. After checking the port,
I found that I needed to configure the speed and duplex settings to
specific values rather than letting them be autonegotiated.
[ More Info ]
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Port Spanning
Cisco switches have the capability to mirror what is going to/from one port
on a switch to another port on the same switch for monitoring purposes.
Cisco dubs this mirroring capability
"
port spanning".
The
monitor command can be used to have all of the data
to and from a particular port copied to another port of your choosing
on the switch.
[More Info]
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Checking MAC Addresses on a Cisco Switch
On a Cisco switch, you can use the
show mac address-table
command to view the MAC addresses of devices connected to the switch.
[ More Info ]
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Cisco 2950 Switch Configuration
I set up a Cisco 2950 network switch this weekend using the
Basic Management Setup process, which consists of answering a series
of short questions posed by the switch in order to create a basic configuration
for the switch. The steps are listed
here.
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