Terry's Blog

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• 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

• Config Policy and Operational Data

  I've written before in Subsystem Configuration Policy Check about incorporating operational data with configurations for performing configuration compliance validation. Another example, with a different twist to it, occurred last week while creating... Posted May 12 2009, 09:15 AM by tslattery with | with no comments Filed under: compliance, Configuration management, Featured, policy

• Device and Interface Groups Aid Config Policy

  Networks use the same devices in many different roles, so configuration validation based on device type isn't sufficient. There are some configuration things that can be checked across all the devices of a certain type in your network, such as checking... Posted Mar 25 2009, 11:38 AM by tslattery with | with no comments Filed under: network analysis, Configuration management, Featured, configuration policy, device groups, interface groups

• Configuration Policy Validation

  My previous post talked about the basics of verifying a configuration prior to deployment as a way to minimize the number of incorrect configurations that are fielded. The second topic, which is closer to the original NANOG posting comments, is with respect... Posted Mar 13 2009, 11:03 AM by tslattery with | with no comments Filed under: compliance, network analysis, Configuration management, Featured, configuration policy