Clear or erase Cisco router log
A router’s log can save your life. Well, at the least it can save you time and headaches when troubleshooting problems. However, in the heat of battle, in the actual hotness of the battle, old messages in the log can get in the way. After making a change to the router’s configuration, for instance, it [...]
Category Cisco router
Increase or change Cisco router log size
Messages logged by a router can make troubleshooting problems substantially easier. However, the default size of most Cisco routers is 4096 bytes which typically accomodates fewer than 60 messages. While this may help in many situations, adding some additional space can save the day when a router generates frequent error messages as when an interface [...]
Category Cisco router
Copy Cisco router config into flash to backup or replace hardware
When replacing a faulty router that is not completely dead, it may be possible to copy the startup configuration to the removable flash memory and swap the flash to get the new router up and configured in as short a time as possible. Without this procedure, it will be necessary to manually copy the old [...]
Category Cisco router
Assign or configure IP addresses on Cisco routers
Every active interface on a Cisco router to be used with IP requires an IP address assigned to it. This short recipe describes how to set an interface’s IP address.
Category Cisco router
Change configuration registry on older Cisco routers
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.
Category Cisco router
Changing an ACL on a Cisco Firewall
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.
Category Cisco firewall
The “Do” command
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
Category Cisco networking
How to disable Cisco router domain name lookup
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” ?
Category Cisco router
