Keep Video from Blowing up Your Network
Terry Slattery will be speaking at another session at Enterprise Connect Orlando 2012. He recently added a technical breakout on "How to Keep Video from Blowing Up Your Network". This breakout...
View ArticleIOS to NX-OS Converter Tool from Cisco
I recently noticed that Cisco has a tool for converting IOS configurations to NX-OS configurations. The tool is called "IOS-NXOS Migration Tool", it is located here: https://tools.cisco.com/nxmt/My...
View ArticleVideo and TCP Goodput talk at C-MUG Apr 2012
Coming up for the April 10, 2012 Cisco Mid-Atlantic User Group (C-MUG) session, Terry Slattery, CCIE #1026, will be presenting a discussion on how you can protect your business applications from video....
View ArticleTroubleshooting Nexus 5500s and 1 GE SFPs
The newer versions of NX-OS support 1G or 10G on the N5K, but the N5K is not auto-speed sensing. A mini case study follows.One of my customers just put some some GLC-SX-MM optics and a fiber patch...
View ArticleWorking With Cisco Nexus 5K Switch Profiles
[Guest article from my friend Dominic Basta. Thanks again, Dominic!]I thought I'd share my experiences working with switch profiles on Cisco Nexus 5000 switches. Cisco suggests using switch profiles...
View ArticleGetting Ready for Cisco Live
"My bags are packed, I'm ready to go. I'm standing here ...."Nope, that is not me. Cisco Live starts tomorrow, and I'm not even finished making my final list. (I've made great progress on some...
View ArticleTroubleshooting Cisco VPN Clients
I use multiple VPN clients, depending on which customer I am supporting on which day. I regularly use the Cisco VPN Client, the Cisco AnyConnect VPN Client, and the built-in Native Cisco VPN Support on...
View ArticlePort-channels, vPCs, and Spanning Tree Issues
In the last week I talked to two different customers about issues with their port-channels, vPCs, and Spanning-Tree Protocol. The first customer thought he had a STP issue between his N7Ks and his...
View ArticleDual Connecting Nexus 2000s to Nexus 5000s
I have been working with a customer testing a pair of Nexus 5548s and dual-connected FEXes. Here are a couple of our lessons learned.Loading Images - Order Matters! After previously dual-connecting...
View ArticleTroubleshooting Port-channels and NX-OS
One of my customers recently had an STP issue in his remote data center. He was not sure of all the details, but sometime during or after the migration of some Layer 2 links between his N7K and N5Ks...
View ArticleDeny Equals Permit in NX-OS QoS ACLs
I was looking over the NX-OS QoS configuration information, and noted that the documentation states that the permit and deny ACL keywords are ignored for the purposes of matching in QoS class-maps....
View ArticleCatch up with Denise at 2012 Blue National Summit
Are you planning to attend the 2012 Blue National Summit in Orlando? If so, you might want to sign up for Denise Donohue's session on "Life in the Post-PBX Era". The session logistics are:Monday...
View ArticleTesting Egress Marking in NX-OS QoS
Updated: 09/18/2012I had been unsuccessful in my attempts to implement egress marking on a Nexus 7000 running NX-OS 5.2(4). Outbound policy-maps for marking are supposed to be supported in NX-OS 5.x,...
View ArticleTesting Egress Marking in NX-OS QoS - Part 2
This is part 2 of my testing of egress marking on NX-OS, the first part is discussed in Testing Egress Marking in NX-OS QoS. The good news is that egress marking does indeed work. With the topology in...
View ArticleFall Networking Event at MDHIMSS on Oct 11, 2012
Denise Donohue, William Bell, and Renee Wagner are looking forward to the "Fall Networking Event" at MDHIMMS on Thursday, October 11, 2012. Chesapeake NetCraftsmen is one of the sponsors of this event,...
View ArticleDavid Yarashus is a Cisco Certified Design Expert
Congratulations to David Yarashus who has earned the Cisco Certified Design Expert designation. David recently passed the rigorous CCDE practical exam, and was awarded CCDE #20120013. Way to go,...
View ArticleNX-OS QoS Hints and Quirks
I have been testing some NX-OS QoS configurations, and have found a couple of quirks as well as some hints that I thought I would briefly summarize.Applying Policy Maps to VLANs (N7K)You cannot apply a...
View ArticleRick Repeats as Cisco Designated VIP Honoree
Congratulations to Rick Burts from NetCraftsmen who has again been recognized by Cisco in their Designated VIP program! Rick has been selected for the 3nd year in a row to receive the Cisco Designated...
View ArticleTerry is Presenting at Enterprise Connect Orlando 2013
Terry will be presenting again at Enterprise Connect Orlando 2013. If you are planning on attending, you might be interested in attending one of the three sessions that Terry Slattery will be...
View ArticleSupporting BGP Backup Paths in NX-OS
I have been looking at using a service provider MPLS VPN to back up an enterprise MAN connections where the core routers are Nexus 7000s (N7Ks).Basic PremiseAn organization called Gamma has two main...
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