Terry's Blog

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• auralization
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• ipv6
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• network design
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• Monitoring Critical Devices & Interfaces

  How do you monitor the critical components of your infrastructure? Let's say that your core consists of 75 key devices, plus the links that interconnect them. It makes sense to monitor device status as well as the links between them. If each system... Posted Jul 13 2009, 09:32 PM by tslattery with | with no comments Filed under: network discovery, Featured, ROI, manual processes

• The Case of the Failed PCI Audit

  "Holy Crap!" exclaimed David from the depths of the cube farm, "We just failed the PCI audit! Check out the email from Tony." Tony is the CIO. David is one of my co-workers, a good friend, and overall smart guy. I turned to my email... Posted Jun 09 2009, 08:58 AM by tslattery with | with 1 comment(s) Filed under: network discovery, security, Featured, PCI

• Calling All Devices - What's on the network?

  It is configuration checking time. Do you know where all your devices are? How do you know that there's not a rogue device lurking in your network? How do you know that the configuration collection mechanism has discovered all the devices in your... Posted May 06 2009, 01:40 PM by tslattery with | with 1 comment(s) Filed under: network discovery, Featured

• IPv6 Network Discovery

  I recently received a comment from Gerry Gerofsky about IPv6 network discovery: Hi Terry, I am trying to understand how CiscoWorks, OpenView discovers an IPv6 network? In Ipv4, typically a tool like OpenView CiscoWorks, you feed it a subnet and it goes... Posted Jan 06 2009, 01:02 PM by tslattery with | with no comments Filed under: network discovery, ipv6, Featured

• Chilling Network Topology Discovery Patent Application

  I discovered a patent application (not yet granted) this week that gave me chills. Part of its claims* are performing Layer 2 and Layer 3 network topology discovery and display, as of October 2001. Huh? Network topology discovery and display was being... Posted Jul 24 2008, 03:07 PM by tslattery with | with 3 comment(s) Filed under: network discovery, network topology, patent

• Network Topology Discovery

  I had the privilege of reviewing a neat paper, Network Topology Discovery , by Eric Siegel, a technical analyst at the Burton Group. His paper covers a many aspects of network topology discovery in 30 pages, sprinkled with details on how things work.... Posted May 06 2008, 12:58 PM by tslattery with | with no comments Filed under: network management, Network Topology Discovery, network discovery

• Useful Visualization

  Visualization of networks has been something that I've been watching for some time and have yet to see anything that looks really interesting. Many vendors use the Tom Sawyer Software package. Netviz had an interesting package but CA (which acquired... Posted Feb 20 2008, 10:27 AM by tslattery with | with 4 comment(s) Filed under: network discovery, visualization, auralization, network map, network topology

• Understanding Network Redundancy

  I am regularly surprised by network redundancy designs that are either overbuilt or underbuilt. There seem to be two major themes that drive these designs. I'll address the first theme in this blog entry and the second theme in a successive blog entry... Posted Nov 27 2007, 11:43 AM by tslattery with | with no comments Filed under: network discovery, network topology, network testing

• IPv6 Security

  One of the security factors I’ve heard espoused about IPv6 is that the large address space (128 bits: 64 bits of network and 64 bits of host address) makes it impossible to scan the network for hosts. On initial inspection, this seemed like a reasonable... Posted Sep 04 2007, 09:21 AM by tslattery with | with no comments Filed under: Network Topology Discovery, network discovery, security, network design, ipv6