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NTL:Telewest Suffers National Network Failure
News The failure follows NTL:Telewest network problems on Monday in Glasgow and Shropshire. NTL:Telewest, the UK's cable broadband operator, has suffered a serious breakdown in its service. Many customers across its former Telewest franchise area tried...
[January 9, 2007, 10:50]
Measuring The Benefits Of Reconfiguring Network Resources To Accommodate Multiple Failure Conditions
White Papers The ever-increasing dependence and volume of daily business operations on telecommunication networks has heightened the need for added resiliency to withstand equipment failure, human-error, and catastrophic outages - so much so that network...
[September 16, 2007, 0:00]
Phoenix Assurance Company Leverages Network Appliance Storage To Ensure Complete Operational Recovery Within 48 Hours Of A Site Failure
White Papers The Israel Phoenix Assurance Company Ltd.specializes in general, life, health, and nursing insurance and is part of The Israel Phoenix Group, the third-largest insurance group in Israel. The company wanted to ensure rapid, uninterrupted access and...
[July 20, 2007, 0:00]
SACK TCP Resilience Improvement With OPNET
White Papers This can occur during network congestion as well as network failure. This paper documents a change to the OPNET version of SACK TCP that improves the protocol's resilience significantly, both during network congestion and for network failure.
[December 26, 2007, 23:00]
Serviceguard Network Manager
White Papers This white paper provides a brief description on the default behavior of the Serviceguard network failure detection mechanism. It also elaborates in detail the new enhancement to the network failure detection mechanism that deals with inbound-only...
[November 15, 2004, 23:00]
Update: UUnet Outage In Atlantic
News The network failure was caused by a router at an unidentified customer of UUnet's. Three Internet services providers had previously claimed UUnet was the source of the failure. The router fed erroneous navigational information into the system...
[November 9, 1998, 15:40]
Dual NICs For Niftier Networking
News For another, they represent points of failure. With NLB, the failure of a NIC will not block traffic to and from a server. For one thing, they represent bottlenecks that can slow the transmission and processing of data across the network.
[July 23, 2002, 8:32]
Network Monitoring In Multicast Networks Using Network Coding
White Papers For distributed randomized network coding, the paper bounds the probability of being able to distinguish among a given set of failure events, and give some experimental results for one and two link failures in randomly generated networks.
[March 3, 2008, 23:00]
Providing Tools For Managed VPN Services: The Role Of MPLS OAM
White Papers Learn how Multiprotocol Label Switching Operation Administration and Maintenance (MPLS OAM) a set of procedures designed to diagnose failure, respond to failure, and test and measure service-level agreements (SLAs) within a given network can...
[July 23, 2004, 0:00]
Orange Silent On Major Broadband Outage
News Orange has apologised to those affected and blamed the problems on a "network equipment failure". The company suffered problems with its broadband service in August after another "equipment failure". This means it can manage the lines itself and...
[October 18, 2006, 14:10]
Impact Of Failures On Routing In Mobile Ad Hoc Networks Using DSR
White Papers Transient analysis shows that after packets en route reach the failure point, they may block the interface queue and cause significant waste of wireless resources resulting in poor network performance.
[August 1, 2007, 0:00]
Thinking About: MPLS Backup Solutions
White Papers This paper compares the value and capabilities of carrier options, IPSec tunneling, and dual MPLS network backup regimes in terms of security, QoS, last mile, full failure, and cost. Secure, reliable corporate data networks were simpler when all...
[December 11, 2006, 23:00]
Handling Firewalls
News Web servers, SQL servers, etc.and log all of their traffic regardless of success or failure. Finally, if your firewall is software-based, you should audit every system and application failure and every success and failure of security.
[May 29, 2002, 21:14]
Centrally Managed Antivirus Software
News Because such systems store the virus signature/definition files in a single location -- usually a network server -- this server becomes a single point of failure for the entire system. A single point of failure
[January 8, 2003, 8:45]
The Seven Rs Of High Availability
News Infrastructure analysts can take a similar approach by configuring disk and tape controllers and servers with dual paths, splitting network loads over dual lines, and providing alternate control consoles -- in short, eliminating as much as...
[November 26, 2002, 12:06]
Spyware: Is It Clogging Up Your Network?
News At first, the description of the error sounded like a DNS failure, but this wasn't the case. Further details suggested a failure of the Firewall-1 HTTP proxy. After weeks of trouble, the organisation called me in to help solve one of the more...
[January 28, 2005, 15:20]
Make Time To Review Your Storage Network Configuration
News At the time of our installation, EqualLogic also recommended, for full redundancy, two separate switches, and provided a cabling diagram for getting the best results in the event of hardware failure somewhere in the chain.
[September 28, 2006, 15:20]
US Army Aims To Take P2P Into Battle
News From a military context, having a centralised server is a point of failure, a critical failure node. In an interview with O'Reilly Network's OpenP2P.com, Macedonia explained that in the future a squad could virtually practice an attack while out in...
[August 30, 2001, 15:13]
Troubleshooting Outlook Web Access
News If your clients are still unable to connect to the OWA server, it's probably either due to a firewall problem or an IIS failure. A failure of both pings could also mean that there is no connectivity between the machine that you're pinging from and...
[February 25, 2003, 10:00]
Is BT's Fusion A Flop?
News ZDNet UK asked BT whether it regarded its sales figures as a failure. We don't regard it as a failure. Fusion cuts phone bills by routing calls over a fixed network connection when one is available, such as in the home, office or a Wi-Fi hotspot.
[January 10, 2007, 12:02]
