Friday, February 10, 2012
LANs/Routers
Error 404--Not Found |
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:10.4.5 404 Not FoundThe server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent. If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address. |
Yahoo! BB in Japan goes 40G
Cisco says Japanese service provider Yahoo! BB is using the 40Gbps OC-768 module for the CRS-1 router in its broadband delivery network.
Yahoo! BB provides Internet access, VoIP, video-on-demand and other advanced services to 5 million ADSL subscribers in Tokyo. With millions of subscribers entering the network at multi-megabit-per-second speeds, the provider decided to install 40G SONET to aggregate and trunk together all of its links at the edge.
Introduced in 2004, the CRS-1 is Cisco’s highest-scaling carrier router, with 1.2Tbps of capacity and 40Gbps of capacity per line card slot. The routers can also be clustered for even higher scale. Up to 72 CRS-1 chassis can be linked together to form a single virtual 92Tbps router fabric, Cisco says. Special optical interconnects are used in this clustering configuration.
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