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FS#12645 — FS#17456 — MTL <> LDN & NWK <> LDN

Attached to Project— Network
Maintenance
Whole Network
In progress
0%
We are currently experiencing a force majeur event which is impacting the following 8 transatlantic links provided by the Hibernia network.
- 4*10G MTL <> LDN
- 4*10G NWK <> LDN

The problem is linked to a shunt fault with the submarine communications cable between Halifax, Canada and Southport in the UK.

Exchanges on the backbone portion are not impacted due to the recently installed FLAG AC-1 and AC-2 100G undersea links.
Inter-DC links have slowed down because exchanges between BHS and Europe go through Strasboug which adds to the latency.

We are going to contact our provider to get an estimation of how long this issue will last and try to restore service on the inter-DC section as quickly as possible.


Comment by OVH - Tuesday, 12 April 2016, 16:18PM

More information on ongoing maintenance

"Hibernia Networks has developed a shunt fault on Segment A - Halifax, Canada to Southport, UK Submarine cable. The shunt fault is to be rectified under a maintenance procedure. Please note that this has been deemed a Force Majeure event.

A shunt fault occurs when the cable insulation becomes damaged from ship anchors, fishing trawlers and ocean currents dragging the cable along the sea floor. Shunt faults do not impact normal optical operation of a submarine cable as this is an electrical fault, but if left unrepaired, these faults can cause significant problems in the future.

An increase in fishing activity in the Irish Sea has meant that Hibernia Networks has revised the risk to Segment A of the Hibernia Network and has decided to avail of a weather window opening towards the end of next week.

As with all submarine repairs, it is difficult to give an accurate time of completion of the repair due to the complexities involved, including factors such as surface weather, sea conditions, and the extent of the damage to the cable. The restoral time is heavily dependent on operational circumstances and Hibernia Networks will provide estimations during the repair when more accurate weather reports and updates from the ship become available."


Comment by OVH - Tuesday, 12 April 2016, 16:19PM

We have opened a ticket with hibernia in order to restore the service via the hibernia-express cable which doesn't seem to be impacted.


Comment by OVH - Tuesday, 12 April 2016, 16:33PM

We have also just fixed a problem on a link between BHS and SBG which goes through the Apollo undersea cable. The link was physically up but no traffic was being sent on it.

It is now fixed.

-

We have just had confirmation from hibernia that two of our Montreal <> London circuits will be rerouted via the hibernia express cable to re-establish the link while waiting for the maintenance to finish


Comment by OVH - Tuesday, 12 April 2016, 16:34PM

last update on hibernia cable maintenance:

"The cable repair ship has located the cable in the last few hours. The cable repair ship has cut the cable and is currently grappling for ends. Weather this morning is favorable and repair efforts by the cable repair ship continue. The weather is to deteriorate later today and we will provide updates as they become available from the cable repair ship and our Marine department. "


Comment by OVH - Tuesday, 12 April 2016, 16:37PM

Hibernia has successfully rerouted 2 out of four circuits between Montréal and London. Optimal latencies have returned and there is no network saturation.