Articles tagged with cisco

1. Controlling Peer-to-Peer (P2P) Traffic with Cisco NBAR

   Posted on May 22, 2007 in Networking

   Is your network bandwidth being consumed by Peer-to-Peer (P2P) traffic? (Hint: If you don't know, it's time to fire up NBAR and do a little investigating.) One way to stop P2P traffic is to use an access-list to block traffic on the well-know P2P ports. Unfortunately, many P2P technologies no …

2. Choosing Between RADIUS And TACACS+

   Posted on April 24, 2007 in Networking

   Deciding whether to use <acronym title="Remote Authentication Dial-In User Service">RADIUS</acronym> or <acronym title="Terminal Access Controller Access Control System Plus">TACACS+</acronym> for <acronym title="Authentication, Authorization, Accounting">AAA</acronym> functionality on a Cisco-based network seems straight-forward. After all, if the network uses Cisco, shouldn't the AAA …

3. UDLD In Radio-Based Metro Ethernet Rings

   Posted on April 17, 2007 in Networking

   <acronym title="UniDirectional Link Detection">UDLD</acronym> is a Cisco protocol designed to detect and disable unidirectional links in Ethernet (fiber or twisted-pair). In the case of a radio-based Metro Ethernet ring, UDLD goes the extra mile in preventing Spanning-Tree loops and user service interruption.

   In this simple network of …

4. Implement a Sensible Naming Policy in Cisco IOS

   Posted on April 10, 2007 in Networking

   Network configuration names are not decoration. They are operational metadata. When something is broken at 2:00 a.m., the difference between ACL-EDGE-IN and access-list is not aesthetic. It is the difference between narrowing the blast radius quickly and spelunking through hundreds or thousands of lines of Cisco IOS configuration …