Author Archives: George Ross

Network disruption yesterday

Apologies for the short network disruption yesterday afternoon.  It was caused by a 10Gbps forwarding loop, which was created as the second-last fibre was being connected as part of our core switch upgrade programme.  As soon as we realised there … Continue reading

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Informatics network core upgrade

We will shortly begin the process of upgrading the switches which form the core of the Informatics network in the Forum and Appleton Tower.  The network has enough resilience built into it that this can happen mostly transparently to users.  … Continue reading

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Forum UPS work on Saturday 3rd

The Forum server rooms are covered by a pair of Uninterruptible Power Supplies (UPSes), one of which has developed a fault in its interface to the outside world.  As a result we can neither query its status, nor expect it … Continue reading

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Informatics to host a sponsored RIPE atlas anchor

Informatics has been selected to host one of the first five sponsored RIPE atlas anchors!  The other four sites are in Macedonia, France, Romania and Albania. The RIPE atlas system consists of several thousand network “probes” dotted around the world.  … Continue reading

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Beware of Domain-squatters

Please take care when you type internet domain names, whether into an address box or at the command line! Domain-squatters are people who register internet domain names which are very similar to other “real” names.  They do this in the … Continue reading

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IPv6

The “IPv6 investigation” project has made good progress since my previous post in January.  We have had global connectivity since February, and have been testing on a variety of subnets since then, including all of our “server” subnets, and most … Continue reading

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Informatics Network “Requirements”

As input to a review which Information Services are conducting into EdLAN, the network which ties the University together, I have written a document which describes the Informatics network and the various “requirements” that guide its design and management. Please … Continue reading

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IPv6 update

IPv6 update… Since my previous post announcing the start of the IPv6 investigation project, good progress has been made: IPv6 support has been tested on the variety of network switches that we run.  As expected, it’s generally good on our … Continue reading

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IPv6

IPv6 was standardised around 15 years ago, primarily as a way to address the anticipated exhaustion of IPv4 address space, and since then we have had a steady trickle of people asking whether they could have one to use on … Continue reading

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Virtual Appleton Tower

As we prepare to decant from Appleton Tower to Forrest Hill and Wilkie Building, I thought it might be useful to describe how we’re networking the buildings and why we’ve done it the way we have. In short, both FH … Continue reading

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