Simple commands to reset BGP as a first step troubleshooting technique

I ran across an ancient 2500 series router today and had to go through a password recovery. The rommon version was earlier than any I’d seen before. The help functionality was very lean. Here’s how to set the confreg for these geezers.

Although changing an ACL on a Firewall is almost exactly like a router, there are a couple nuances that people should know. Here are some tips and best practice material.

If you are running Cisco IOS 12.2(8) or better, you can use the “do” command to run privileged commands in global config mode. In layman’s terms, you can run “show” commands while config or config-if

Ever foul up a command on a router or switch and have to sit there and wait for five minutes while it translates for the “domain” ?

Check and customize what protocols are running through your router with nbar protocol-discovery. this gives you packet count, byte count, 5 min bit rate, and 5 min max bit rate.

When setting a password against the console, auxiliary and vty lines on a cisco router, unless password encryption is switched on the passwords will be displayed when viewing the config on the terminal screen

Sometimes when rains a lighting could damage your router, that’s what happened to me last week.The problem was that the lighting deleted the cookies of my router’s eprom, it contains the data that the bootloader use to determine the MAC address,the CPU version,the vendor etc. Based on this informations the IOS runs or not on [...]

This small guide can be useful if you need to configure the RSPAN session on your Catalyst 6500.In this example we will see how to monitor more than one VLan using the RSPAN vlan. RSPAN has all the features of SPAN plus support for source ports and destination ports distributed across multiple switches, allowing remote [...]

Sometimes you need to know which switch and port you are connected to. I work for a community college with hundreds of switches. Here is a method I’ve found to work well.