Reply to: Is Jobserve knackered?

[BrilloPad]

Apparently this outage has also stopped me getting mobile phone reception at clientco!

I have to go outside to get a signal.

Seems it took out some mobile phone masts : well at least that is what t-mobile are telling me.......

[DaveB]

It's still perfectly possible to fully divergent routes (terminate at different exchanges and take different routes to the exchanges) for cables used to connect the hosting site, but it is very expensive. Once it's on the backhaul network (reached a Teclo POP - not a local exchange) all backup routes are fully divergent.

Chances are wherever jobserve is hosted doesn't have a fully divergent solution, but I bet they will very soon!

Yes it is possible and yes it is expensive, but at some point those routes come back together and may not be as divergent as you think. You may have physically independent routes into your site from seperate local exchanges but those exchanges almost certainly share a common connection at the regional exchange. If the line from the regional exchange gets cut, as appears to have happened here, then you are still stuffed.

This incident has caused the same kind of outage as the Manchester tunnel fire a few years ago. This cut off 130000 lines including many businesses that supposedly had redundant or divergent connections to prevent this happening.

[The Agents View]

" Contractors working on an Olympic venue near Stratford, east London, dug through the fibre optic cable on Saturday knocking a BT exchange at Old Street offline. "


Blame it on the contractors!

Get off your soap box!

In this context, the blame is directed at the company responsible for delivering the (piling works I think) Project - not the individuals engaged by them!

It does beg the question how a group of "specialists" can miss a 20ft wide tunnel running straight under the olympic park, and not notice the funny noise the drilling machine was making before the lights went out though.....

[pmeswani]

" Contractors working on an Olympic venue near Stratford, east London, dug through the fibre optic cable on Saturday knocking a BT exchange at Old Street offline. "


Blame it on the contractors!
Anyone in the Disaster Recovery - start knocking on Jobserve's door.

They probably have a DR in place, but didn't realise that the secondary ISP were going through the same backbone.

[saptastic]

" Contractors working on an Olympic venue near Stratford, east London, dug through the fibre optic cable on Saturday knocking a BT exchange at Old Street offline. "


Blame it on the contractors!
Anyone in the Disaster Recovery - start knocking on Jobserve's door.

[the_duderama]

To a point. Country to country connections are pretty redundant, city to city also. Once you get down to local level though it all gets a bit iffy since there is a limited number of bits of wire you can have coming and going from each end point, you can't avoid having multiple services running over a single fibre or a single physical route.

It's still perfectly possible to fully divergent routes (terminate at different exchanges and take different routes to the exchanges) for cables used to connect the hosting site, but it is very expensive. Once it's on the backhaul network (reached a Teclo POP - not a local exchange) all backup routes are fully divergent.

Chances are wherever jobserve is hosted doesn't have a fully divergent solution, but I bet they will very soon!

[ba55meister]

Bend over son....I'm coming for ya.....

lol I expected it to be some kind of jobserve related conversation

[The Agents View]

Badger me - I wish to be your bitch

Bend over son....I'm coming for ya.....

[DaveB]

I thought the whole thing about the internet is that it is supposed to be fault-tolerant. With multiple routes for IP traffic

To a point. Country to country connections are pretty redundant, city to city also. Once you get down to local level though it all gets a bit iffy since there is a limited number of bits of wire you can have coming and going from each end point, you can't avoid having multiple services running over a single fibre or a single physical route.

[expat]

I thought the whole thing about the internet is that it is supposed to be fault-tolerant. With multiple routes for IP traffic

Yeah that's bollux, there are several single points of failure.

[KentPhilip]

I thought the whole thing about the internet is that it is supposed to be fault-tolerant. With multiple routes for IP traffic

[Mephisto]

I'm an agent - what on EARTH were you expecting??

I would like to point out that canvassing for business in the East London area today is quite tough going - fortunately there's the whole rest of the country to badger.......

Badger me - I wish to be your bitch

[The Agents View]

KUATB

I'm an agent - what on EARTH were you expecting??

I would like to point out that canvassing for business in the East London area today is quite tough going - fortunately there's the whole rest of the country to badger.......

[DaveB]

Olympic cock-up knocks East London off Internet.

KUATB

[basshead]

http://noc.enta.net/2009/04/outage-f...#comment-15783