Articles in the Networking category
For those that don't follow the ARIN Public Policy Mailing List, the following is excerpted from a post by Thomas Narten in response to the announcement that the
<acronym title="Internet Engineering Steering Group">IESG
</acronym> has approved a new document to replace the existing RFC 3177 (IPv6 Address Assignment …
If 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 …
For 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 …
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.
||Cisco 7604 Router
||Cisco Catalyst 6500 Series …|
This is a picture (larger)
of a Cisco 7604 with Sup32 and SAMI card. The modules you see here are:
||Cisco 7604 Router
||Cisco Catalyst 6500 Series / Cisco 7600 Series Supervisor Engine 32 with 8 ports Gigabit Ethernet, PFC3B, and MSFC2A
For some reason, they don't make this completely obvious.
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 …
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:
If you find yourself in the situation where a Cisco 7200 series router has a corrupted IOS image or the flash drive has gone on the blink, the following documents may be useful to you. Not all of these documents are Cisco 7200 specific, but they are all useful.
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,
is less than ideal.
Fortunately, Cisco …