Lindsay Hill network control, visibility, management

IPv4 Address Transfer Process

IPv4 exhaustion is a real issue for large parts of the world. IPv6 is the long-term solution, but it doesn’t solve today’s problems facing ISPs. Alternatives are needed - either CGN, or purchasing more IPv4 blocks on the open market. Recently I’ve been involved in the purchase & transfer process - here’s my notes on how it works within the APNIC region.

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HP Simware - Comware OS Simulator

HP recently released “Simware”, a Comware network simulator that lets you create test networks of emulated Comware switches and routers. This can be used to create “virtual” networks, ideal for learning, feature validation, and change testing. It’s broadly similar to Dynamips. It’s not perfect, and it’s been a long time coming, but it’s a start.

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SolarWinds DPI - Looks Interesting

[UPDATE 26/6/14] This code is now available as a Release Candidate.

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CCIE Preparation: How Deep Do I Go?

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Meraki AP Trial

Cisco Meraki offers a free wireless AP to anyone who registers for a webinar about their products. I had given up on receiving my AP, but after a moan on Twitter, it arrived. I’ve been using it in the office for a few weeks for simple wireless access, and I’m pretty impressed by it. The management interface is pretty slick, and it would clearly solve a lot of problems for anyone dealing with a widely distributed network.

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HP VSR Portal Redirection

When implementing HP IMC UAM, you may need to redirect users to the IMC webserver, for device registration & configuration, and obtaining user 802.1x certificates. One method of doing this is to put users into an initial “Registration” VLAN, and configure an HP Comware device to redirect all web traffic. Here’s how to do it using HP’s VSR Virtual Router.

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Network Automation - Stop Fighting It

Network Engineers should be embracing the idea of automating away the drudgery of running a network. They should be looking for ways to ensure the network can dynamically change its operation to ensure optimal application performance. But it seems there will be a lot of resistance to this, and it won’t be technical: It will be cultural.

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War Stories: Switches Lying about Duplex Mismatches

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Software Support - Are You Getting Value?

Companies pay a lot of money for software support. But do they always get value for it, and do vendors sometimes prolong the “supported” life of a product simply to bank extra revenue? We should hold vendors to account, and demand better.

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Can't Start HP IMC on Linux?

I was recently asked about how to start IMC on a Linux server. After the initial installation, the system had been restarted, and now IMC wasn’t running. How to start it again?

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