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• Building Configuration Policy Checks, Part 3

  Implementing Changes Once you have your network policies defined, see the prior posts Part 1 and Part 2 , then implemented in a configuration policy check, you need a way to correct any non-compliant configurations. An obvious choice for remediation is... Posted May 13 2011, 12:51 PM by tslattery with | with no comments Filed under: compliance, change management, Configuration management, configuration update, configuration policy, config policy, configuration change, configuration compliance, device grouping, device tagging, interface tagging, configuration checking

• Building Configuration Policy Checks, Part 2

  In the prior post, I explained why configuration policies are needed. Now it is time to discuss how to build policies. I like to start with the written policies, because that tells me what was intended. An example is: "All network devices will be... Posted May 04 2011, 01:55 PM by tslattery with | with no comments Filed under: compliance, Configuration management, Configuration Repository, configuration update, configuration policy, config policy, config archive, configuration change, configuration compliance, configuration checking

• Packet Pushers Podcast

  I did a Packet Pushers Podcast recently with Greg Ferro and Josh O'Brien , talking about the common network problems that we see in operational networks. The list of topics comes from a poster, The Top 25 Network Problems and Their Business Impact... Posted Oct 19 2010, 09:33 AM by tslattery with | with no comments Filed under: Configuration management, Configuration Repository, configuration policy, duplex setting, spanning tree loops, configuration change, configuration compliance, HSRP, default route, black hole route, duplex mismatch, routing black hole

• Selectively Update Edge Port Configs

  HN3BC7ARUXHE This past week I had to update selected edge ports on a set of Cisco Catalyst 4507 and 4510 switches. Two things forced me to take the time to use NetMRI's Configuration Command Scripting (CCS) language to automate the process. The first... Posted Apr 19 2010, 03:14 PM by tslattery with | with 1 comment(s) Filed under: Configuration management, Featured, CCS, interface configuration, scripting

• NCCM: Verify Configuration Changes

  I've been doing a configuration change on over 500 devices of a customer's network, and using NetMRI to install the change was extremely easy. Below is the script that I used, and I thought it would be useful to describe how it works. The overview... Posted Mar 30 2010, 04:46 PM by tslattery with | with no comments Filed under: Configuration management, NCCM, Featured, configuration change

• Monitoring QoS Traffic Class Drops

  This week I was part of a panel at the Satellite 2010 conference in Washington, DC. Our panel was titled "Securing Your Network: Protecting your Operations, Content and Assets." Your first thought upon seeing the session title was probably "encryption... Posted Mar 19 2010, 04:00 PM by tslattery with | with no comments Filed under: voip, qos, Configuration management, Featured, congestion

• Saving Cisco Router Configuration

  As I write this, we're going through another "snow event", with a forecast of high winds and 10-20 inches of snow to top the 24-36 inches that fell a few days ago - over 67 inches so far this year, which has broken all snowfall records for... Posted Feb 10 2010, 12:52 PM by tslattery with | with no comments Filed under: Configuration management, Featured, saving cisco router configuration, command execution

• Identifying Unsaved Running Configurations

  Have you ever lost a device configuration because you forgot to save it to NVRAM and the device later rebooted, perhaps due to a power outage? More than likely some feature or function that had been operating correctly since the last change suddenly stopped... Posted Dec 21 2009, 10:35 AM by tslattery with | with no comments Filed under: Configuration management, Featured, config diff, config archive

• Saved by the Configuration Repository!

  We recently had a near-disaster occur at a customer. A 6500 10/100 ethernet blade had died and was replaced. When the replacement blade was installed, the configuration for its interfaces disappeared from the configuration! The techs couldn't figure... Posted Dec 05 2009, 03:51 PM by tslattery with | with no comments Filed under: Configuration management, NCCM, Configuration Repository

• Network Availability and High Availability Networks

  Scott Hogg of Global Technology Resources (GTRI) did a nice blog post for Network World way back in April, 2009 about High Expectations of Network Availability (http://www.networkworld.com/community/node/40827) and a slightly more recent one in May, "... Posted Dec 05 2009, 02:44 PM by tslattery with | with no comments Filed under: high availability, Configuration management, network configuration