Cloud Ethernet Forum – Because Ethernet needs to look like Frame Relay

Where do you want Ethernet ? Everywhere apparently.

I’m at a conference about “Cloud Ethernet Forum” and subsidiary operation of the Metro Ethernet Forum that seems to want to invent a new Ethernet. The fundamental premise of the is that customers need/want/demand/must have more Ethernet in the WAN.

Why ? Because Ethernet is better for data centre managers.

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Response: Reinventing storage – Ethernet über alles! | Speaking of Clouds

Holy schmoly, someone in the storage industry did something new. Geoff Arnold from Speaking in Clouds writes: Yesterday Seagate introduced its Kinetic Open Storage Platform, and I’m simply blown away by it. It’s a truly elegant design, “as simple as possible, but no simpler”. The physical interconnect to the disk drive is now Ethernet. The interface […]

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Response: IEEE 400 Gb/s Ethernet Study Group

Surprising. The IEEE are just starting on 400 GbE.  Given that the 40Gb and 100GbE standards took seven years to complete this is lousy delivery from the standards body that is fundamental to networking. The current research indicates that 100GbE will be widely deployed by 2017. Starting 400GbE now is at least three years too […]

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Internets of Interest for 1st April 2013

I’ve been very busy lately with several large analyst/research writing projects so less links than usual this week. It will be sometime before I return to a more regular blogging schedule. You should check out Packet Pushers in the next few days where we will be launching a new feature – we are writing our own […]

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Merchant Silicon Evolution, 40GbE arriving in 2015 & Impact on Data Centre Design

I’ve been reading a presentation from Sharkfest 2012 where a engineers from Microsoft are presenting on their
Microsoft’s Demon – Datacenter Scale Distributed Ethernet Monitoring Appliance. The whole presentation is interesting but this particular slide caught my attention:

Tech Notes: What is Shortest Path Bridging IEEE 802.1aq – Brief

Summary of the key elements of the Shortest Path Bridging Protocol IEEE 802.1aq.

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Nexus 5500 Packet Forwarding – Cut Through or Store & Forward

Was reading through some documentation as noticed that the Nexus 5500 series has some unusual behaviours for Store and Forward. I made myself notes about the functional modes. Cut-Through vs Store and Forward In cut-through mode of operation a switch will start transmitting a frame before the frame has been completely received and this is the […]

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Basics: What’s the Difference between STP BPDU Guard and Root Guard

BPDU Guard and Root Guard are enhancements to Spanning Tree Protocol (STP) enhancements that improve the reliability of the protocol to unexpected events ad are primarily to ensure design enforcement ( integrity / security). There they must configured in specific locations in the networks.

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Tech Notes: Juniper QFabric – A Perspective on Scaling Up

Juniper QFabric is a new approach to Ethernet Switch Fabrics. When it was announced last year,it was noted that the underlying physical design is a completely different approach to building Switch Fabrics. Here I’m taking a loosely research based approach to understand how Juniper QFabric is different from all other approaches to the problem, and also a look at some of the challenges ahead.

Can Fibre Optic Ethernet Cables Be Longer Than The Standard ?

Short Answer is “It depends, but usually yes.” Long answer follows with a discussion of launch power, receiver sensitivity, and cable losses.

Responding: On optimizing traffic for network virtualization

I’m responding to Brad Hedlund’s post “On optimizing traffic for network virtualization” where he seems to missed a key point. It’s about cost of ownership in terms of ability to troubleshoot.

Ethernet Jumbo Frames, Full Duplex and Why Jumbo Frames are 9000 bytes)

I’ve been doing some research into Ethernet and the use of Jumbo frames for some content I’ve been writing and come across something interesting. The documents state that Jumbo frames can only be used on Full Duplex Ethernet connections.

What are 10 Gigabit Ultra Short Reach (USR) Optics ?

A couple of weeks back I posted this article comparing pricing and features on Cisco Fabric Ethernet Transceivers as a low cost option compared to 10GbaseSR SFP+ optics in when building 10GbE networks – Cisco Nexus 5000 / 2000 Pricing Bundles and Fabric Extension Transceivers (FETs) vs 10GbaseSR SFPs.

What is an Ethernet Fabric ?

Define “Ethernet Fabric”

Backplane Ethernet – the GBaseK Standard

A lesser known standard is Backplane Ethernet. I wasn’t aware of it until I was researching Notes on Cables and Connectors for 40 and 100 Gigabit Ethernet. I spent some time over the weekend scratching an itch to have a look at it and why it exists.These are scrach notes, and observations from a research session and not intended to a canonical investigation. Interesting though because it’s is valuable to understand that many network products are functionally all the same – only the software and the people are different.

Internets of Interest:3 Jan 11

Collection of useful, relevant or inane places on the the Internets for 3 Jan 11:

All The Ethernet Cooks

Just how many standards bodies actually make standards for Ethernet ?

Futures Review on 40 and 100 Gigabit Ethernet

Some short observations on 40GbE and 100GbE after reviewing various pieces of documentation. I’m especially focusing on the physical interfaces and cabling data here and its impact on our working practices.

Show 17 – Big Hot and Heavy Switches – Part 2

A detailed look at the Big, Hot and Heavy Ethernet Switches with a large crew to talk about their practical experiences on design, selection and performance of Cisco Nexus switches. The result ? We don’t think the Nexus switches are very exciting.

Packet Pushers – Show 16 – Big Hot and Heavy Switches – Part 1

A detailed look at the Big, Hot and Heavy Ethernet Switches with a large crew to talk about their practical experiences on design, selection and performance of Cisco Nexus switches. The result ? We don’t think the Nexus switches are very exciting, HP Flex10 modules are a problem, and so much more. Due to people […]

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