If the 3550 series switches don't have a 'no setup express' statement issued in the global configuration, and the botton highlighted in the attached document is pressed for a few seconds, the switch will go back to it's factory default configuration?
Note: I'm calling it a button but it's actually the entire highlighted section shown on the attachment.
If setup express is enabled on global config mode and you press the Mode button for 2 seconds on a configured switch, the mode LEDs start blinking. If you press the Mode button for a total of 10 seconds, the switch configuration is deleted, and the switch reboots. The switch can then be configured like a new switch, either through the web-based Express Setup program or the CLI-based setup program.
Check this link and this will give you all the details relating to express setup mode
According to the command reference for the setup express command, if you hold the button on an unconfigured switch for a 'few seconds' it will begin the express configuration routine - as long as you have not changed the command from the default of setup express. If you hold the button for a few seconds with the no setup express command entered or a configured switch, the LEDs will flash.
However, if you hold the button for at least 10 seconds (I'd call that more than a few) it will restore to factory defaults. Configured or not.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...