Greg Ferro has brought back the petition for Cisco to provide an emulator to the community for learning. Since our current and only family of emulators is well on its way to oblivion, I ask that we all take the time and sign this petition. To use a cliché, we need to act now...
Posts Tagged ‘ ios ’
Another Blow to Dynamips/Dynagen/GNS3
It looks like Cisco is trying to crack down on illegal distribution of their software. I can't really blame them since it's their property. Aaron ConawayI like to lean my head to the left, hit it with the palm of my right hand, and document what knowledge falls out.Website - More Posts Download article...
Syncing IOS Versions on a 3750 Stack
Here's a graceful way to synchronize the IOS on a stack of 3750s.
Getting Temperature Data from a 6500 via SNMP
I apologize to my adoring fans (both of you) for the lack of posting. I’m in the middle of moving, buying a new house, selling my current house, getting a mortgage, etc. I’ve up until 11:30 nearly every night filling out forms and going through red tape. Don’t get me started on getting money...
Filtering Out the Noise on the Edge
There’s a lot of noise on the Internet. I’m not talking about certain news sites, either; I’m talking about stuff like port scans or attempts on weak services from all sorts of bad people on the Internet. A large chunk of that noise can be filtered by the edge routers, taking some of the...
Configuring Dedicated Trunks for the CSM
Did you catch the article on setting up fault tolerance on the CSM? In that article, I mentioned that Cisco recommends a dedicated trunk for the FT VLAN if you have two HA CSMs in two chassis. Discuss amongst yourselves while I drone on. Why should you set up a dedicated trunk for this...
Using Probes on the CSM
There are three different ways that a CSM checks for the health of the servers — active probes, inband health checking, and inband HTTP monitoring. Let’s talk about active probes. Active probes (or just probes) typically send traffic to one of the RIPs of a serverfarm, do some stuff, and give a pass or...
Configuring Fault Tolerance on the CSM
Like (nearly) everything in the Cisco world, you can set up your CSM to fail over to another module when the primary dies a horrible death. You can have two in the same chassis or even have them in separate chassis — the process is the same no matter how you have it set...
Setting Up System Logging on an IOS Device
I like logging on an IOS device. I like to look at the buffer and tell you that your interface went down 30 seconds ago. I like to look on the box and see that BGP with my Internet provider has been flapping since 02:13ET. I like to look and see that one of...
Using the Pipe in IOS
A lot of IOS commands give you a lot of information. Most of the time, though, it’s way too much information, and it sure would be nice to do some grep-like stuff on the output, right? Well, just like on Linux, you can use the pipe (|) to do such. That’s not a butt...
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