Routing

David’s Border Gateway Protocol (BGP) Resource List

For those of you interested in the routing protocol of the Internet - Border Gateway Protocol, or BGP - I have written a number of articles on the topic. I recommend you checkout the following:

• Five things you should know...

How to Enable Policy-Based Routing in the Cisco IOS

Policy based routing (or PBR) is a process that has the router put packets through a route map before routing them.  This may be a good way of sending packets to a particular path for protocol security routes, for instance, instead of using the default shortest path algorithm.  To use PBR,...

Managing Cisco IOS IP Routing Authentication Keys

Key management is a way of controlling authentication keys used by routing protocols. You can think of these as "passwords" for your routers. Not all routing protocols can use key management. Only DRP Agent, Enhanced Interior Gateway Routing Protocol (EIGRP), and Routing Information Protocol...

How to Configure Integrated IS-IS

Cisco Integrated IS-IS is part of a link-state Interior Gateway protocol and supports CLNP, IPv4, and IPv6.  To verify your platform support, please see my article covering the Cisco...

What is Route Table Profiling and How can it help you?

Originally introduced as a hidden command in IOS 11, Route Table Profiling is now an officially supported command and can be very helpful to Cisco network Admins. With Route Table Profiling, you can monitor for fluxuations in the routing table, route flapping, and network outages, among other...

Cisco Service Provider Router Overview – the most powerful routers ever made

In a recent article, I covered the Cisco service provider router lineup. These amazing routers are what allow us to surf the web and watch IPTV. In this article I cover routers like the CRS-1 (Cisco's most powerful router) and the new Cisco ASR 9000 and 1000 routers. To see the full article, read ...

Cisco’s new Routing & Switching 360 Learning Program

Cisco announced a new learning program that will be offered from select learning partners. This could be like the master's program of Cisco routing and switching with the CCIE lab being the capstone. The new

Use extended ping and extended traceroute to better troubleshoot your Cisco network

In one of my recent articles, I covered how to use the Cisco IOS extended ping and traceroute commands to troubleshoot your network. Knowledge of how these commands work is critical to solving many networking issues. The extended options give you so much power! Read the full article at:

How to set OSPF Limit Retransmissions using OSPF to help the system admin

The limit for demand and non-demand circuits is set to 24 by default. Sometimes that’s not enough time to ensure that all our data packets are arriving successfully. That’s when this command comes in handy. Here is the command for limit retransmissions: limit retransmissions {[dc...