Sometimes the phrase ‘working the ticket queue’ is code for ‘doing meaningless work’. If you find yourself playing whack-a-mole with your ticket queue, then this is the post for you. You should strive to do meaningful work and this post discusses … Continue reading
The post Four Trouble Ticket Survival Tips appeared first on The Network Sherpa.
Network automation is a hot topic right now. However, many of the automation solutions focus on edge-port provisioning. I can understand why vendors are chasing this niche; port-provisioning is a high-volume and error-prone activity. Network Automation Ideas Port provisioning isn’t the only … Continue reading
The post 3 Suggestions for Network Automation appeared first on The Network Sherpa.
An emergency switch replacement can ruin your day. However, having network config backups is not enough. Restoring full service may not be as easy as just copying the running configuration from your RANCID CVS repo, or your colleagues hard drive. Restoring the ‘identity’ … Continue reading
The post Network config backups – just the beginning appeared first on The Network Sherpa.
I’ve written quite a few posts on this blog, but admittedly I’ve slowed down a lot. I have plans to change that soon, but in the mean time I’ve compiled a quick run down of my top-five popular posts by … Continue reading
The post My top five posts – Nov 2015 appeared first on The Network Sherpa.
I don’t want a software defined network, I want a software-assisted network. I want tools that will help prevent common but straightforward mistakes and make it easier to baseline a network. These tools have to work on real networks. Those messy, brownfield, imperfect … Continue reading
The post What about software assisted networking? appeared first on The Network Sherpa.
No, I’m not starting a naming war. Not really. I don’t care if you use ! or # or >> or {} to mark your interface descriptions. I don’t care if you use all-caps or lowercase, or if you feel … Continue reading
The post Interface descriptions – your last hope appeared first on The Network Sherpa.
Fiber types are differentiated as multimode or single mode. Single mode was always easy for me to understand but I could never quite understand what ‘multimode’ actually meant. I’m written some notes for myself on this topic that I thought I’d … Continue reading
The post The many ‘modes’ of multimode appeared first on The Network Sherpa.
It’s been quite a while since I’ve posted here but I wanted to highlight some work I’ve been doing with Greg Ferro and Simon Chatterjee on the Packet Pushers podcast. We recorded a three part series where we dive deep … Continue reading
The post Packet pushers podcast – Hardware Resources appeared first on The Network Sherpa.
I’ve been trying to learn linux networking and virtualisation using a donated server in a remote lab. The server didn’t have an IP-KVM attached but it did have a working IPMI connection. Not that I’d need it of course; I … Continue reading
The post Using IPMI Serial-over-LAN for server consoles appeared first on The Network Sherpa.
I received the question below from reader Ned as a comment on my 24-port ASIC post and thought that the discussion was worth a post of it’s own. …Would you be able to speak a bit about the actual physical path … Continue reading
The post Is CPU or ASIC responsible for forwarding? appeared first on The Network Sherpa.
This post discusses power supply ‘holdup’, and how it can impact network or server hardware uptime. The holdup time or ‘output holdup time’ is the length of time that a given power supply can maintain output power to the switch … Continue reading
The post Hardware – What’s the ‘holdup’? appeared first on The Network Sherpa.
Engineers are often unstuck by poor planning and get hit with large financial penalties as a result. Projects can become mired in delays and complications due to unforeseen costs and expenses. There are some unavoidable bumps in the road, but … Continue reading
The post Planning projects instead of burning benjamins appeared first on The Network Sherpa.
Before we look at equalization and pre-emphasis, we should examine some fundamentals of waves and signals. A perfect square wave is a really useful way of representing a waveform in the time-domain, but it’s not the only way of looking at … Continue reading
The post Hardware – Equalization and Pre-emphasis appeared first on The Network Sherpa.
In the last post I discussed clock and data recovery (CDR). This post examines an application of re-timers (or CDRs) within XFP and SFP+ transceivers. I’ve previously covered the size, power and connector differences of 10G transceivers before, but this post will focus … Continue reading
The post Hardware – Is SFP+ just a smaller version of XFP? appeared first on The Network Sherpa.
Clock and data recovery is an essential physical-layer function of modern switch and router hardware. Digging deep into the electronics of a router may not be your thing, but clock recovery is a fundamental building block for other network hardware … Continue reading
The post Hardware – Clock and Data Recovery appeared first on The Network Sherpa.
Modern top-of-rack switches (or TORs) run at line rate and are non-oversubscribed. This means you get non-blocking [1] port-to-port throughput within the switch ASIC at the line rate of the front panel ports. Almost all TOR switches use a single switch … Continue reading
The post Build a 48-port switch using a 24-port ASIC appeared first on The Network Sherpa.
If you need regular console port access then nothing beats a fixed console router. However there are many times when that simply isn’t an option. For occasional console connections I use a Keyspan USB/Serial adaptor with my MacBook. It’s … Continue reading
The post AirConsole Review appeared first on The Network Sherpa.