Posted by: Pete Welcher
on Aug 27, 2010
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I've been pondering writing a series of blogs about the topic, Data Center of the Future ("DCoF" below). The present topic, "How Many Servers?", may be the first of that projected series. I've been tracking, reading, and learning about the various topics for some years now. I don't claim to know everything about any of the topics, but I do hope I have some thoughts that are original if not challenging. And I hope my discussion points will stir some debate and alternative points of view via comments on the blog pages. |
Posted by: David Hailey
on Aug 24, 2010
I understand that many UC Engineers may look at this blog subject and write it off as an old topic; however, I assure you that my experience has shown me that the introduction of the CFA CSS Activation Policy to CUCM is still a commonly overlooked and misunderstood topic. If I had to guess, I’d say that this seemingly minor change is most often overlooked when upgrading CCM 4x systems to most any newer version of CUCM. I’d also be willing to guess that this oversight has bitten at least some of the most seasoned UC Engineers during Day 2 (post-cutover) support.
Posted by: Rob Chee
on Aug 7, 2010
The Cisco NAC device filter is used to allow computers to bypass authentication and optionally perform posture assessment. The optional posture assessment is based on the role that is assigned to the device filter. The MAC addresses, used in the device filter list, can be added through the NAC Manager Web GUI or through the NAC API.
Posted by: Rob Chee
on Aug 4, 2010
I needed to get Java working with Firefox on my CentOS box. The primary reason was to do some additional NAC testing with Linux. I've been having a much harder time getting it installed than I originally thought. I finally got it working and wanted to share my steps and links.
Posted by: Rob Chee
on Aug 1, 2010
The Cisco NAC subnet filter is used to allow computers to bypass authentication and optionally perform posture assessment. The optional posture assessment is based on the role that is assigned to the subnet filter. These subnets can be added through the NAC Manager Web GUI or through the NAC API.
Posted by: Rob Chee
on Jul 31, 2010
When Cisco NAC is used in out-of-band (OOB) mode, SNMP read and write functionality is critically important. The NAC Manager uses the SNMP write community to change the VLAN that individual switch ports are connected to. For example, after a user passes NAC authentication and posture assessment, the end computer is moved from the authentication VLAN to the access VLAN. If something stops this SNMP write packet from getting from the NAC Manager to the switch, then NAC functionality would be broken.
Posted by: Rob Chee
on Jul 18, 2010
With SSL certificates, there is the concept of a public key and a private key. When looking at traffic sent from the client to the web server, the public key is used to encrypt data and the private key is used to decrypt data. The client gets the public key from the SSL certificate. The private key is a highly protected value stored on the web server. If someone was able to obtain the private key, they could pretend to be the web server and successfully decrypt traffic that was supposed to be sent to the web server. For this reason, the private key needs to be carefully protected.
Posted by: David Hailey
on Jul 6, 2010
This was my first time attending Cisco Live (aka, Networkers) and I had a great time. I started my week off with an all day CCIE Voice Lab techtorial that was really good. From there, the week continued with a number of technical sessions on a variety of topics. Aside from the technical sessions, there was a lot of "networking" going on as well. I made it a priority to be at the NetCraftsmen booth as much as possible. I was able to talk and have discussions with a number of peers, existing customers, potential customers, and even catch up with some old friends. I was impressed to find that many of you keep tabs on our Staff Blogs which is great to hear. I also received several congratulations on my recent appearance in Telecom Reseller's "Meet the Expert" article. To add to the great press NetCraftsmen has received lately, I was finally able to meet the folks at Telecom Reseller at Cisco Live as well. In fact, I took a few minutes to talk a bit more about Chesapeake NetCraftsmen via a live podcast from Cisco Live 2010.
Posted by: William Bell
on Jul 1, 2010
Recently I fielded a question on managing prompts in Cisco's Unified Contact Center Express (UCCX) using CRS scripts. The person posing the question knew that they needed to use the Upload prompt script step but wasn't sure how to authenticate a user to the system. This process is pretty straight forward, but there are a few steps involved. I figured I would do a quick blog/"how to". Why not? Right?
Posted by: Carole Warner Reece
on Jun 30, 2010
Denise and I are networking here with John Chambers at CiscoLive yesterday evening after the CCIE NetVet reception.
We noticed that Denise and I were the only two female CCIE NetVets in the room, so are hoping next year to instigate a breakfast birds-of-a-feather for women in networking at CiscoLive Networkers 2011.
