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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

• 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

• NANOG Posting on Configuration Analysis

  The North American Network Operators Group (NANOG) email list just had an interesting exchange about configuration management. Someone asked: For auditing, is there any Cisco Router/Switch configuration analysis tool? Someone else replied: Depends on... Posted Mar 09 2009, 11:09 AM by tslattery with | with no comments Filed under: Configuration management, Featured, configuration policy, config diff

• Subsystem Configuration Policy Check

  I'm working on a network that requires configuration checks be performed. For some of the subsystems, that's pretty easy because the configuration is done per device and there are no external dependencies. For example, the desired SNMP, logging... Posted Dec 08 2008, 12:57 PM by tslattery with | with 2 comment(s) Filed under: Configuration management, Featured, configuration update, configuration policy