Articles in the Networking category

  1. Cisco Switch Cluster Automatic IP Addresses

    Posted on in Networking

    Old Cisco Systems LogoIf you've used Cisco switch clustering in a basic network (for example, when all switches are connected together and <acronym title="Cisco Discovery Protocol">CDP</acronym> is enabled), you've likely never considered how this switches communicate with each other. You might assume that the switches are using IP addresses from …

  2. Cisco IOS 15 Licensing

    Posted on in Networking

    Old Cisco Systems LogoFor those that have been using Cisco IOS 12 forever, you may not have realized that Cisco has begun rolling out IOS 15. Although there are a lot of technical changes and features that are being introduced, IOS 15 introduces a new licensing scheme that may throw old users for …

  3. Cisco 7600: Packets Not Reaching SAMI Card

    Posted on in Networking

    The situation: A Cisco 7604 with SAMI card is able to send packets from the individual IOS instances running on the SAMI PPCs, but is unable to receive packets.

    The hardware: The table below describes the hardware involved.

    Part Number Description
    CISCO7604 Cisco 7604 Router
    SUP32-GE-3B Cisco Catalyst 6500 Series …
  4. Cisco 7604 with Sup32 and SAMI card

    Posted on in Networking

    Cisco 7604 with Sup32 and SAMI card

    This is a picture (larger) of a Cisco 7604 with Sup32 and SAMI card. The modules you see here are:

    Part Number Description
    CISCO7604 Cisco 7604 Router
    SUP32-GE-3B Cisco Catalyst 6500 Series / Cisco 7600 Series Supervisor Engine 32 with 8 ports Gigabit Ethernet, PFC3B, and MSFC2A
    WS-SVC-SAMI-BB-K9 Cisco …
  5. Show Cisco Interface Status and Traffic Rates Only

    Posted on in Networking

    I would hope there is a better way to do this. The other day, I had a need to see all the interfaces on a router and how much input and output traffic they were passing. This just seems like something that should be built in, but I've not seen …

  6. Cisco Input and Output Queue Drops

    Posted on in Networking

    This seems to be a pretty common problem for Cisco users. Not that Cisco devices have more queue drop problems, just that more Cisco users are a little confused by the information generated in the show interface command.

    Specifically, we're talking about the lines that look something like this:

    Input …
  7. Cisco iperf Equivalent or Cisco-based Bandwidth Testing

    Posted on in Networking

    If you've worked on networks long enough, you're probably familiar with iperf. This application is great for testing throughput between two computers on your network. Unfortunately, if you find yourself in a situation where you have less than two computers to test with, iperf is less than ideal.

    Fortunately, Cisco …

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