17th May 2012

Cisco C6500 Service Modules – Not My Choice, Now.

These all suggest that the time for planning and designing Service Modules is over. There are no suggestions that service modules for the Nexus 7000 will be developed that I can see. I can prognosticate that it would slow down the development of the core switch / route / performance functions, and it will be some years before those core capabilities is complete enough that service modules would become viable product development tasks — they might be in development, but not much chance of going into production. [^1]

Do I sound bitter about Service Modules ? A bit. I’ve had a number of hard to solve problems that lasted months before code fixes arrived. I’ve been fan of the NAM but the price is now far removed from it’s practical value. USD$30K List is way over priced for its capabilities and even with a 30% discount, you can buy a lot of network management systems that deliver much better functions and features for that price.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Those Non-IOS Files on the Flash. Are They Useful ?

When you first receive a router from a Cisco warehouse, it comes with a complete collection of IOS add ons. A common question is whether these files are used for anything ?

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco Nexus Power Supplies | Lots of Flexibility

In years gone by, power supplies for chassis switches were notoriously complicated. Some work with 110V only, some with 240V. Couldn’t be combined with other power supplies – all models identical. This led to lots of piles of spare power supplies in the corner of the data centre somewhere hoping they could be reused one day.

So it’s refreshing to see the flexibility of the power supplies for the Nexus 7000.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOS: What Is VLAN 1002 – 1005 Used for ?

Why does a Cisco IOS SX switch not let you use VLANs 1002 − 1005 ?

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Show Ip Eigrp Topology All

Once upon a time the command was “show ip eigrp topology” to show EIGRP topology, now it’s “show ip eigrp topology all” and the old command show only Feasible Successors.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOU:Connect IOU With Real or External Networks

This is a reblog from http://inetpro.org/wiki/Connect_IOU_with_real_networks_or_dynamips and is a perl script that allows Cisco IOU to connect to external resources. I haven’t test this myself.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOU:Scripted Start Multiple Routing With L2IOU, Memory

This was sent in. Got lots more flexibility and more easily adapted for changes in your IOU image (if there are ever any). Comments are my own (hopefully they are accurate).

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOU: What Can Cisco Do for Testing, Validation & The IPv6 Challenge ?

Wendell Odom has asked the question “If Cisco Would Give Us Anything for Learning/Testing..”. Here is my response.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOU: Starting Multiple Routers

Here is a bash script for starting multiple IOU instances in a reasonably painless way. It’s not elegant, but I’m not a proper Linux nerd to make it any better than this.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved

Cisco IOU: Shutting Down the IOU Processes

This is a simple bash shell script that looks for all IOU processes that have been started with the ‘wrapper-linux’ utility and then kills those processes.

This post is copyright of Thropos Ltd ©2008-2011 at Etherealmind.com - contact | email: greg.ferro@packetpushers.net - twitter: @etherealmind | All rights reserved