Network Notices
Uncapped IS Clients:
IS Update [28-04-2010], SMW4 (Seacom) maint on-going. International Consumer DSL ClearChannel Velocity services. New expected SMW4 recovery date.
SMW4 Maintenance STILL IN PROGRESS, affecting Seacom traffic.
Seacom have indicated that SMW4 repairs are expected to be completed by
midnight tonight (23h59 SAST).
IS team continue in efforts to urgently reroute international traffic
via an alternate path today, working urgently with our international
partners.
[IS Update 26-4-10 06h47] Seacom SMW4 Emerg maint STILL IN PROGRESS. INTL Consumer DSL ClearChannel Velocity services interruption no connection. No ETR
UPDATE:Seacom has advised that repair maintenance work will be performed on the international SMW4 cable on Sunday, affecting traffic across the Seacom cable system.
IMPACT: No connectivity
ATTENDING: Upstream Service Provider
STATUS: Repairing cables
We are still experiencing the following service event, as per our initial notification:
Dear IS Customer
Emergency Seacom Maintenance Notification.
AFFECTED SERVICE: International Consumer DSL, Clear Channel & Velocity
AFFECTED POPS: international traffic between SA and London/New York
START DATE: Sat 24 Apr 10 00h00 (SAST)
END DATE: Sat 24 Apr 10 23h59 (SAST)
EXPECTED DURATION: unknown - to be advised
IMPACT: Service interruption
REASON FOR CHANGE: Seacom SMW4 repairs
IS REFERENCE: Seacom
ADDITIONAL INFO:
Seacom has advised that repair maintenance work will be performed on the Seacom SMW4 cable on Saturday. At this time they are unable to confirm exact times or duration. As soon as we receive a confirmed schedule, we will advise you.
IS Update, IS International Consumer DSL, Clear Channel & Velocity, Emergency Seacom maintenance, traffic between SA & London/New York, Sat 24 Apr 10 @ 07h00 - 17h00
Please advise your clients accordingly with regards the maintenance below
Dear IS Customer
UPDATE of Dates and duration:
Emergency Seacom Maintenance Notification.
AFFECTED SERVICE: International Consumer DSL, Clear Channel & Velocity
AFFECTED POPS: international traffic between SA and London/New York
START DATE: Sat 24 Apr 10 07h00 (SAST)
END DATE: Sat 24 Apr 10 17h00 (SAST)
EXPECTED DURATION: up to 8 hours, but may vary
IMPACT: Service interruption - no connectivity
REASON FOR CHANGE: Seacom SMW4 repairs
IS REFERENCE: Seacom
ADDITIONAL INFO:
Seacom has advised that repair maintenance work will be performed on the international SMW4 cable on Saturday, affecting traffic across the Seacom cable system.
As repair work is at sea and dependant on a ship arriving at a designated position, times may vary and duration may vary. The above times are approximate.
Regards
The IS GSC
IS International ADSL, Access & MPLS VPN, Emergency Telkom SAT3 maintenance, traffic between SA and London/New York, Thu 22 Apr 10 @ 08h00 - Sat 24 Apr 10 @ 16h00
Emergency Telkom Maintenance Notification.
AFFECTED SERVICE: International ADSL, Access & MPLS VPN
AFFECTED POPS: International traffic between SA and London/New York
START DATE: Thu 22 Apr 10 08h00 (SAST)
END DATE: Sat 24 Apr 10 16h00 (SAST)
EXPECTED DURATION:
IMPACT: Increased latency
REASON FOR CHANGE: SAT3 maintenance
IS REFERENCE: Telkom
ADDITIONAL INFO:
Telkom have advised that all traffic will be placed on restoration path,
starting at 08h00 on Thursday, in preparation for repairs. This will
result in increased latency on international traffic.
The SAT3 repair wotk will commence at 02h00 on Saturday morning and is
expected to take between 6 - 8 hours. However, an extended change window
has been scheduled as a contingency measure.
Regards
The IS GSC
UPDATE:
We are still experiencing increased latency on international traffic,
International ADSL & Access services between Johannesburg and
London/New York;
International MPLS services between Johannesburg and New York.
Telkom are still routing certain international circuits across their
restoration path (not all traffic has been normalised). This has been
escalated to senior Telkom management, and we are awaiting further
feedback of status and plans to normalise traffic routing.
IMPACT: Increased latency
ATTENDING: Telkom engineers
STATUS: Investigating
We are still experiencing the following service event, as per our
initial notification:
Dear IS Customer
We are experiencing the following service event:
AFFECTED SERVICES: International ADSL, Access, MPLS VPN
AFFECTED POPS: INTL traffic between SA (Cape Town, Rosebank) and London,
New York
GRADE OF SERVICE IMPACT: Major
SERVICE IMPACT: Increased latency
CAUSE OF EVENT: Telkom SAT3 circuits on restoration path
TIME: 15-4-10 15h15
OUR REF: N/A
CURRENT STATUS: Monitoring
ATTENDING: Telkom engineers
ADDITIONAL INFORMATION:
Telkom have informed us that due to emergency maitenance, traffic on
SAT3 has been rerouted onto a restoration path. The target date for
normalisation of traffic onto primary SAT3 path is 19 April 2010.
Sun 18 Apr 2010
We have received the following network notification from our upstream provider:
This is notification of the undersea Seacom Fibre maintenance job scheduled for Sunday 18 April 2010. The cable will be lifted from seabed for Engineers to work on.
The scheduled project time is expected to 09h00 - 16h00, but the risk of damaging the cable in the process is possible, which can delay the downtime.
International browsing will be affected. Clients should expect a Degraded performance.
We apologize for any inconvenience caused!
Kindly take note of the following Planned Maintenance that will be taking place during the period 31-January-2010 to and including the 02-February-2010, will affect SAT-3 traffic as per attached. The RET testing (testing of the 94 Restoration bearers) has already commenced. This is not service affecting and is in preparation for the Restoration exercise. Below are the tentative scheduled dates and times : RET on Friday 29 January starting at 10h00 SA time (not traffic-affecting exercise). This has already commenced as per above. Tentative Restoration Schedule for Sunday 31 January 2010 starting 02h00-17h00 SA time. This will facilitate the restoration of the 94 SAT-3 bearers to alternate submarine cables (SAFE/SMW3). Please take note that all Telkom SA Customers on the 94 Restorable bearers will experience physical patching hits for 10 minutes within the associated maintenance window. Unfortunately higher latency is a characteristic of the restoration route (via Malaysia and India to Europe) and is unavoidable. Power reconfiguration on Monday 1 February 2010, starting 02h00-08h00 SA time. This is to perform BU (Branching Unit) reconfiguration in order to normalise the power configuration on SAT-3. Please take note that all non-restorable traffic will be down for the full period (02h00-08h00 - SA time). The Telkom SAIX Network will also unfortunately be affected with a 50% degradation in capacity, resulting in congestion on International browsing during this period. The Telkom SA SAIX notice board will be updated. Tentative Normalisation Schedule 2 February 2010 starting at 02h00-17h00 SA time. This will facilitate the Normalisation of all 94 restorable bearers from the SAFE/SMW3 routes back to SAT-3. Please take note that 10 minute patching breaks will be experienced during this period. Summary of effect to TSA traffic:
Restorable: Will see physical patching hits on the following dates: 31 January 2010 and 2 February 2010, within the approximate maintenance window (02h00 to 17h30 SA time). Higher latency will be experienced during the restoration period. Non-Restorable: Traffic will be down for the duration of the Power Reconfiguration exercise on Monday 1 February 2010, starting 02h00 SA time, until the power has been successfully reconfigured. This usually takes between 2 to 6 hours. Non-Restorable traffic returns automatically after successful power reconfiguration has been performed.
Hoax Email
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