Dan A – Page 3 – Netnorth Limited

Hypervisor Reboot – 02/Mar/2021

By Dan A | March 2, 2021 - 6:50 am |March 2, 2021 Faults

At 6:44am this morning, a hypervisor based in Manchester crashed and restarted. Any VMs on this host will have been forcibly reset. No other issues have been reported and we will investigate further.

Switch DS-105 failure BOL8 – 13/Jan/2021

By Dan A | January 13, 2021 - 5:27 am |January 13, 2021 Faults, Network

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At 5:13am this morning we saw a brief power event on our main UPS in BOL8 datacentre followed by Switch DS-105 going offline. Although no issues are reported surrounding the power event, any customers directly connected to switch DS-105 are currently offline. DS-105 is a legacy switch stack and not… Continue reading →

Cisco Switch Crash/Reboot – 17/Dec/2020

By Dan A | December 17, 2020 - 12:24 am |December 17, 2020 Faults, Network

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At approx 11:45pm tonight (16th Dec), one of our core switches (DS-193) crashed and rebooted. This had the same error code as the other switch earlier this week and runs the same IOS version. As a result, we will now schedule IOS upgrades on all core switches.

Cisco Switch Crash/Reboot – 9/Dec/2020

By Dan A | December 9, 2020 - 1:50 pm |December 9, 2020 Faults, Network

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At 1:34pm today, one of our switches (DS-162) in BOL23 crashed and rebooted. Investigation looks like a bug in the Cisco IOS image being triggered causing the automatic reboot. Any customers directly connected to this switch would have seen a brief period of disconnection during the reboot. No further issues… Continue reading →

Dark Fibre Outage – 22/Nov/2020

By Dan A | November 22, 2020 - 10:21 am |November 22, 2020 3rd Party Faults, Faults, Network

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We currently have a dark fibre outage between two datacentres in Manchester. Our fibre provider is investigating. No outages to customers are expected, however this fibre outage does remove resilience at our “LD2” Manchester hosting. Customers hosted within Manchester are now “at risk” although no outages are expected. We operate… Continue reading →

Emergency Reload of DS-129 04/Nov/2020

By Dan A | November 4, 2020 - 2:44 pm |November 4, 2020 Faults, Maintenance, Network

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We have identified an issue with one of our core network switches, DS-129, located in LDeX 2 Manchester. This switch has hit a known Cisco IOS-XE bug and requires a reboot to activate an IOS-XE update. As this issue is currently service affecting, we will perform an emergency upgrade/reload of… Continue reading →

DDoS Attack – 03/Sep/2020

By Dan A | September 3, 2020 - 12:31 am |September 3, 2020 Network

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We are currently seeing a distributed denial of service attack against a customer since around 12:15am (UK local time) – this appears to be an LDAP reflection amplification attack. Some mitigation has been applied at our network borders to reduce traffic levels to minimise disruption for the affected customer. This… Continue reading →

Openreach Planned Engineering Works – 02/Sep/2020

By Dan A | September 1, 2020 - 11:47 am |September 1, 2020 Advisory, Maintenance, Network

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Openreach will be performing planned engineering works from 11pm 2/Sep/2020 until 7am on 3/Sep/2020 in Manchester. The openreach supplied reason for maintenance is “node/joint remake for faults/quality purposes” This maintenance will cause the loss of one of our metro ethernet circuits during the maintenance window. No impact is expected due… Continue reading →

Power Failure – Equinix MA1 – 11/May/2020

By Dan A | May 11, 2020 - 3:07 pm |May 11, 2020 3rd Party Faults, Faults, Network, Power

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At 14:27 (UK local time) today, we saw our peering sessions via LINX Manchester flap (restored at 14:31). Further reports came in of a loss of power feeds (both A and B feeds) for some customers of Equinix MA1, however this has not affected our power feeds for equipment in… Continue reading →

Core Switch Reboot – 02/May/2020

By Dan A | May 2, 2020 - 1:48 am |May 2, 2020 Faults, Network

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At 1:19am this morning (UK local time), one of our core switches rebooted due to a software bug. This switch connected to one of our core routers which caused a brief period of instability whilst our network reconverged. The core switch is back online, however the core router is currently… Continue reading →

Author Archives: Dan A

Hypervisor Reboot – 02/Mar/2021

Switch DS-105 failure BOL8 – 13/Jan/2021

Cisco Switch Crash/Reboot – 17/Dec/2020

Cisco Switch Crash/Reboot – 9/Dec/2020

Dark Fibre Outage – 22/Nov/2020

Emergency Reload of DS-129 04/Nov/2020

DDoS Attack – 03/Sep/2020

Openreach Planned Engineering Works – 02/Sep/2020

Power Failure – Equinix MA1 – 11/May/2020

Core Switch Reboot – 02/May/2020

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