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Outages

INFO: core router maintenance

We are seeing BGP issues affecting one of our core routers in HEX, London. This may involve the need to reboot this equipment late this evening. This will affect a few of our leased line customers only.

Outage thn-gw2 22/11/2016 [resolved]

Our monitoring started reporting that one of our core routers in Telehouse (thn-gw2) failed just after 19:15 this evening. We have now rebooted this and the router appears to be back and stable. We will investigate the cause of this and update the ticket as needed.

Most customers would not have noticed this (other than some slightly different routing) and possibly a few short periods of packet loss as routes re-converged. A small number of connections are directly connected and may have seen a longer outage as the router was restored.

We believe full service is now resumed – If you are seeing any ongoing issue please contact support in the normal way

We are sorry for any issues caused by this

UPDATE: issue fixed: VOIP SIP issues –inbound calls failing

UPDATE:

Divert Service Failures
Details: SIP Diverts are now working as normal and our engineers will closely monitor our VoIP network for any re-occurrences. If you were affected by the issue please retest and if the problem is still present contact our Support Team.

One of our suppliers is aware of a network problem as below. We’ll update here as they troubleshoot this. In the meantime, please accept our apologies if your circuits are affected.

Network Affected: VoIP
Problem Time: Wed 19th Oct 2016 at 9:30 am
Estimate Resolve Time: Wed 19th Oct 2016 at 10:00 am
What Does It Affect: Customers using SIP divert service
Event Overview: Divert Service Failures

Details: Some of our customers may be experiencing problems with our SIP Trunk Divert Service where inbound calls are failing. Our engineers are currently investigating and there will be further updates shortly.

Network Blip 10/07/2016

Due to a crash in one of our core routers in Telehouse North a few minutes ago this rebooted causing a very brief loss of service to come customers as the backup router took over the routing.

Customers directly connected would have seen a slightly longer outage. All routers are back up and running and full service should be restored. If you have a broadband service with us and are seeing an issue PLEASE try to reboot as this should solve any remaining issues.

We apologise if not all calls where answered during the issue- the team where busy answering calls and ensuring the issue was resolved as quickly as possible

Notification of Planned Work: 12th August Telehouse North – Virgin Media Business

We need to let you know about some maintenance work that will be taking place on our network. We will be upgrading one of our network back-haul links into the VMB node at our London, Telehouse North site.

Planned Work Start (Local UK): 12/08/2016 00:01 Planned Work End (Local UK): 12/08/2016 06:01

Impact: There will be a loss of service at some point during the timeframe stated above whilst we complete the maintenance work. You will see several interruptions to your service during the 2 hour outage window. We have planned and believe that all circuits will automatically return to service after the work is completed

Only those circuits supplied via VMB will be affected. Please email into support in the normal manner if you have any questions.

[CLOSED] OUTAGE: VOIP service

[update 17:40]

We believe that all connections have now been restored. If you still have VOIP problems, please raise a ticket in the usual manner.

We apologise for this down-time and are actively investigating alternatives and fail-over solutions as this is the second such outage in a few months.

[update: 16:00]

We understand that services are slowly being restored. This may take some time so please bear with us — we’re in the hands of the external supplier here. Further updates will follow as we get them through from the supplier network.

[update 14:52]

The supplier advises that the incident currently affecting their network is down to a Denial of service attack. They are now working with transit vendors to stop the attack and restore the network. Further updates will follow.

[update at 13:49]

Please be advised that the supplier is continuing to investigate the cause of this issue and apologise to all our customers who are affected by this. Further updates will follow.

We’re aware of issue affecting our core supplier which has dropped all of our VOIP circuits including our own PBX. There is no time to fix yet but we’ll update this ticket as we know more.

UPDATE: upgrading Virgin Media fibre into 5 Avro Court 23rd & 24th March

In preparation for additional fibre capacity being brought into the building tomorrow evening — with work commencing on both dates at 6pm — tonight we will force the traffic over our other two backup supplier back-haul channels to ensure that when the Virgin circuit is swapped over to the new fibre connections tomorrow, no down-time is seen.

This may result in some very temporary route instability and slight increase in routing times seen as the work starts & ends tonight and tomorrow. This should resolve automatically.

As always, if you have any concerns, please contact support in the usual manner.

INFORMATION: broadband connections

Tonight we are performing an urgent security update on a number of our core routers that handle FTTC and ADSL connections.

This will manifest as a brief loss of connectivity, possibly twice during the evening but only for a period of a couple of seconds as the sessions are dropped and fail-over to one of our other routers.

The connection should automatically re-establish itself. If after a power-down of your router for 10 minutes and a re-boot you still aren’t able to re-connect, please email into support@merula.net for assistance.

SECURITY PATCHES: Vulnerability Summary for CVE-2015-7547 – glibc

Since the 18th February, we have been working to ensure that all in-house systems affected by this advisory are being patched accordingly. We have been advised and judge that this work needs to be completed as quickly as possible. This may therefore require brief windows of downtime affecting both single and multiple services & circuits.

Wherever possible we will post an early notification of such customer affecting works.

If you have any concerns or require further information, contact support in the normal meaner.

Vulnerability Summary for CVE-2015-7547

Original release date: 02/18/2016
Last revised: 02/19/2016
Source: US-CERT/NIST

Overview

Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing “dual A/AAAA DNS queries” and the libnss_dns.so.2 NSS module.

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score: 8.1 High
Impact Score: 5.9
Exploitability Score: 2.2
CVSS Version 3 Metrics:
Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Network Instability 02/02/2016

There was a period of network instability between 1am and 2am this morning. This appears to have been due to a network storm within our network. We have now stabalised the network and you should see full service from all servers.

We are monitoring the network to ensure this does not re-occur and are investigating the root cause of this issue to ensure it does not re-occur

We apologise for any issues this may have caused

EMERGENCY CONTACTS

The main support number is 0845 330 0666 (geographical 01480 355566)

There’s a second, fallback (geographical) number: 01480 411616. All numbers ring directly at our support centre, manned 24hrs x 365 days a year.

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