The ‘Cisco networking’ Archives
Posted June 19, 2006 by

Set the Time on a Cisco Router Manually

Setting the internal clock in a Cisco router allows timestamping of logging information which makes troubleshooting much easier. If you do not have an NTP server running, you can set the time manually with a simple command.

Category Cisco router

Posted June 18, 2006 by

Set the Telnet Source IP Address for a Cisco Router

The default source IP address when telnetting from a Cisco router is that of the interface closest to the destination. Because some access lists may block traffic from the default IP address, it may be useful to temporarily or permanently set the telnet source IP address. This also helps test access lists.

Category Cisco router

Posted June 18, 2006 by

Send Messages to Other Users on a Cisco Router

Multiple users can be logged into a Cisco router at the same time. It may be necessary (or sometimes just fun) to send a text message to one or all users on a router. For example, if you are preparing to reload the router, admin etiquette dictates that you should warn other users.

Category Cisco router

Posted June 18, 2006 by

Show or List Which Users Are Logged into a Cisco Router

Wide area networks are often very wide, and installing or troubleshooting remote routers often requires fingers on keyboards in more than one physical location. Getting a listing of the users logged into a router is simple, which makes it easier to send that user a message (as many remote locations have no cell phone signal).

Category Cisco router

Posted June 13, 2006 by

Configure Cisco Router to Send Messages to Remote Syslog Server

Centralizing log messages to a syslog server can improve the manageability of any size network and can decrease response times to resolve problems. Sending router log messages to a remote server also allows longer archiving of messages than in a router’s limited storage. Messages stored by syslog have permanence that a router does not. When […]

Category Cisco router

Posted June 13, 2006 by

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, old messages in the log can get in the way. After making a change to the router’s configuration, for instance, it is easier to monitor only subsequent messages […]

Category Cisco router

Posted June 13, 2006 by

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 accommodates 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

Posted June 12, 2006 by

Copy Cisco Router Config into Flash to Back Up 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, manually copying the old configuration to the new router […]

Category Cisco router

Posted May 25, 2006 by

Assign or Configure IP Addresses on Cisco Routers

Every active interface on a Cisco router to be used with IP requires an IP address be assigned to it. This short tech-recipe describes how to set an interface’s IP address.

Category Cisco router

Posted February 21, 2006 by

Change Configuration Registry on Older Cisco Routers

I found an ancient 2500 series router today and had to go through a password recovery. The rommon version was earlier than any I had seen before. The help functionality was very lean. Here is how to set the confreg for these older models.

Category Cisco router

Posted September 22, 2004 by

Cisco CallManager Partition and Calling Search Spaces (CSS) Explained

Cisco CallManager partitions and calling search spaces (CSS) are confusing. This Tech-Recipe describes how I keep track of how they work.

Posted September 22, 2004 by

Cisco CallManager Least Cost Routing

The following tech recipe describes a simpler method for least-cost routing configuration for Cisco CallManager.