Our hosts are having to do some scheduled maintenance this coming Sunday. It looks like a minor thing and the interruption should only be for a few minutes. This is the message they sent us:
Dear Valued Customer,
RE: Coreix :: Scheduled Network Maintenance – Sunday 30th November 2008
Location: STA.LON2
The Coreix engineering team will be conducting network maintenance beginning at 00:00AM GMT on Sunday 30th November 2008, lasting until 06:00AM GMT of the same morning.
Summary of downtime and customers affected:
Part 1 – None anticipated
Part 2 – Customers who take communal load balancing solutions will be affected by 30 seconds to 1 minute of downtime.
Part 3 – All customers, there will be an increase in latency and some packet loss. There will be a customer edge outage for approximately 2 to 5 minutes per rack whilst we migrate customers from one chassis to another.
Part 4 – None anticipated – Minor route changes are expected.
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Part 1 – The operating system upgrade of core1.sta.lon2.coreix.net
Scope of work: The upgrade of the JunOS on core1.sta.lon2.coreix. The hardware will be taken offline cleanly and should have no impact on networking operations.
Outage: We do not anticipate any downtime during this maintenance section due to the Coreix network resiliency.
Rationale: Coreix performs periodic Operating System upgrades on its equipment to improve security and features on its equipment.
Part 2 – Upgrade the operating system on lb1.sta.lon2.coreix.net
Scope of work: The upgrade of the WebOS on lb1.sta.lon2.coreix. The hardware will be taken offline cleanly, upgraded and rebooted.
Outage: All customers who take communal load balancing services may see 3 or 4 packets lost during this maintenance (approximately 30 seconds to 1 minute of downtime), while the load balancing equipment fails over. Customers with dedicated load balancer solutions will not be affected.
Rationale: Coreix performs periodic Operating System upgrades on its equipment to improve security and features on its equipment.
Part 3 – The upgrade of dist7b.sta.lon2.coreix.net
Scope of work: As part of our expansion at the Stratford site (sta.lon2), we will be migrating customers from one distribution 7a and replacing the chassis of distribution 7b. The new chassis will still maintain the redundancy you expect from Coreix (dual supervisor, dual power supplies, multiple copper and optical cards for dual edge switching ports and core uplinks).
Outage: As we swap over to the new chassis customers will be migrated rack by rack. Since all Coreix edge switches have 2 uplinks to the distribution the downtime will be minimal since we will run the two in parallel. I have estimated 2 to 5 minutes per rack, however in certain instances the swap over will be significantly lower.
Rationale: We are increasing the port density of our distribution layer in response to an unanticipated rapid expansion of colocation, enterprise services and dedicated servers.
Part 4 – The addition of core3.sta.lon2.coreix.net
Scope of work: The Coreix network expands its peering arrangements on a daily basis and as we grow our routing requirements increase. As part of our expansion we are installing a third core router at the Stratford site. The main task of the router will be to mix our primary peering traffic (private peers plus public exchanges), and will act as another resilient node on our network.
Outage: This is a node addition therefore we do not expect any downtime during this period. Customers may see minor route changes for direct peers during this period as the traffic migrates from one core to another (however no traffic should be lost).
Rationale: This upgrade is in response to an increase in traffic and peers on our core routers.
Thank you for your understanding as we continue to improve our services.
If you have any further questions or would like any clarification please do not reply to this email but contact the support department via https://support.coreix.net/ or support@coreix.net
Best Regards,
-Coreix Engineering Team
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