back to article Linx outage caused by upgrade

A mangled port upgrade caused an outage at Linx yesterday. A spokesman for Linx (the London Internet Exchange) said a routine port upgrade introduced a problem which caused processor usage in a router to surge, leading to instability on one of its LANs. The other LAN, provided by another vendor, took over and members had to do …

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THN not LHC

The power problems were in one suite on the ground floor of Telehouse North, not the London Hosting Centre.

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Headmaster

*A* London Hosting Centre

Not *The* LHC.

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The title is required, and must contain letters and/or digits.

The power problems knocked our network connection out as well, but we're in Telehouse Metro.

One of the joys of London data centres really - only takes a small problem in one to cascade to loads of others.

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makes sense

might explain the problems i had around that time. i was going to blame bt but....

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Boffin

Look at those stats

Linx is peaking at nearly 600Gbps! That's a lot of traffic. Twice as much as two years ago. Note the ramping up of data in late 2007... Anything to do with iPlayer and iPhones?

V.

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Go

dare i suggest

That is a whole lot of porn...

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Anonymous Coward

Inter-AS ISP Stats

My daily inter-autonomous system ISP top-talker stats suggest it is traffic to/ from AS15169 aka google = youtube. And has been for a long, long time.

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Anonymous Coward

What makes sense?

The topology is a redundant L2 ring. A shared IP subnet.

A port upgrade sounds more like a specific IXP router/ Unix eBGP Route-Reflector problem which players whose routing policy permits will inter-connect via.

Tier-1 players are unlikely to inter-connect via this because they want to sell Joe Public Tier-2 IP Transit.

Sounds like a bit of a drama for a specific line card upgrade for the IXP itself. BGP takes care of re-routing anyway via another path for any customers exchanging prefixes via the route-server.

Only speculating...

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Not LHC

*A* London Hosting Centre, not LHC :)

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Anonymous Coward

Broadcast storm

It wasn't a port upgrade, a member's session was being turned up and due to miscommunication between the member's engineer and the LINX engineer a loop was somehow introduced in to the network which caused a broadcast storm and a switches CPU to max out cue packet loss and dropped BGP sessions.

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Anonymous Coward

Agreed

But it doesn't take 20 mins to figure out or switch to another topology.

Most of the players at LINX are large Tier-2 or 1 and their engineers hopefully know better than to spew even CDP et al on to that LAN.

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