Had an interesting issue today. I enabled AAA Authentication on a used Cisco 3560 switch. I then created a user with privilege 15. But, every time I used either telnet or SSH, I was always getting User Mode. I wanted Priveleged Mode. Since the highest level of privilege commands is 15, I should be getting full permissions if my user is ALSO set at privilege 15,...
Read More About Getting user-mode after logging in with aaa user at privilege 15 » I love TACACS+. I know there are those of you who prefer RADIUS, but there are a few reasons why I love Tacacs It's tried and true. Stable It's TCP not UDP (c'mon, you knew I'd use this...) It's easiest to configure Group -> Command mapping So, when HP iMC 5.1 came out with TAM (Tacacs Authentication Module), I just HAD to try it out! So, I...
Read More About Can't authenticate Cisco to HP iMC Tacacs » So, I purchased a Cisco ASA 5505 to build a VPN Tunnel from a remote office to my main office. Really simple to do, when you are using Easy VPN . Anyway, I wanted to turn on SSH. So, I enabled SSH on the ASA, and tried to access it: [apaxson@netutil ~]$ ssh -l username 1.2.3.4 ssh_exchange_identification: Connection closed by remote host Hmmmm..... let's do a debug,...
Read More About Accessing Cisco ASA using SSH » On Sept 12, I posted a tweet saying that I purchased my first HP Switch. Obviously, this caused some discussion between the HP lovers, and the Cisco loyalists (okay, that's an exaggeration). In this post, I hope to communicate to you *why* I chose to purchase 2 HP 5406's, even though I'm working on my CCIE and I have Juniper EX's running around. First, let's talk about...
Read More About I purchased my first HP Switch! » During HP Discover 2012, I've been asking various HP divisions on the plans HP has for an OpenFlow controller. The reason? For the last 18 months, I've noticed that every HP event mentions SDN and OpenFlow. Why? Just adding support for a technology is not a big deal. One, maybe two announcements, and you are done. Why so much talk about it? Surely...
Read More About Interview of HP's Saar Gillai on SDN » I finally figured out, albeit late, on how to do the old "PIX" 'alias' command on a Cisco ASA. For those that remembered, the 'ALIAS' command would basically do a DNS rewrite. If you have a webserver on your DMZ with a static ip on an outside address, your internal users wouldn't be able to access it. DNS would return your outside IP, but because the address is on the outside...
Read More About The ASA version of PIX 'alias' command » Dynamips is a Cisco IOS emulator. Dynagen is a way to wire-up your routers to make a fully-capable network. It's most common use is for lab-work. You can use it to help with your studies or test out features and configurations before deploying them into your production network. Many people prefer GNS3 as a graphical front-end to Dynagen. However, for me, the...
Read More About Dynagen Install with CentOS » I’ve been really interested and excited with what HP has done with the IMC (Intelligent Management Center) over the last couple of years. I’m sure it was a great product before then, but I’ve only been following it for the last 2. This month, HP released IMC version 5.1, which has alot of new features that I wanted to check out, including 802.1x auditing. After I installed the demo...
Read More About Configure Juniper SFlow for HP IMC » OpenFlow has really gotten the buzz over the last 12-18 months. More and more companies and customers are not only getting bit by the bug, but they are loving it. For me, I am VERY interested in it. On the up-side, you can do unique things with the network, that has never been done before...Solving challenges that used to be botchy hacks and tweaks to current protocol...
Read More About OpenFlow Overview and Videos » Peak10 Datacenter is expanding it's Nashville co-location again. Currently, they have 2 locations in Nashville, so called NAS1 and NAS2. Together, they create approximately 25,000 square-feet of 24/7 access to cooling, storage, and co-location data services. Their new expansion will add an additional 15,000 square-feet of datacenter goodness to Nashville, bringing...
Read More About Peak10 Nashville Expansion and DR » HP has finally filled in the dark void in their networking product lines. They have the datacenter and campus level switches, but hasn't had an offering in the Top-of-Rack product space, until now. On Wednesday, HP unveiled the 5900 series switches aimed directly to top-of-rack uses. The 5900 is a high-density 24- or 48-port 10Gb switch. The...
Read More About HP fills the Top of Rack switch gap with 5900 switches » I was recently shown the HP 3800 switches, and their stacking technology. The 3800-series are gigabit switches with 24 and 48 port models with PoE and 10Gb/SFP uplinks. What is unique about these switches, is that not only do they support up to 5 fully meshed switches, but HP claims to have larger thoroughput with each link over Juniper and Cisco's line....
Read More About HP Delivers Stacking for 3800 Switches » ip default-route vs ip route Ran into a small problem yesterday, where a sub-contractor dispatched a technician to provision a new DSL line (on a Cisco 851) for me at one of our retail stores. It really was not a huge change. Mostly, just changing the ip address and default route. After 3 hours, the technician calls me back saying it’s not working, and if I gave him the right...
Read More About Cisco - ip default-route VS ip route » I'll start off by saying, I'm not an analyst. I'm not going to quote or link you to analytical articles or mention Gartner's Quadrants (oh crap, I just did!). What I am going to write about, is my personal opinions on where Cisco is going with their data networking in the enterprise, and why. I do make many generalizations in this post, so please comment on...
Read More About Is Cisco Losing in Switching/Routing? » Showing 1 - 15 of 17 results.
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