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The Yorkshire Ranter

So we were talking about China exporting its internal chaos, while also importing Indian internal chaos. Then, the good folk at 31 Jin-rong Street, Beijing gave us a practical example. That would be AS4134, CHINANET-BACKBONE, aka China Telecom’s long lines/Internetworking division. Starting at 1558 GMT, they leaked a very large number of other people’s routes into the global Internet. According to Martin Brown of Renesys, the incident affected some 31,847 routes in 10 minutes, or several times the number normally announced from 4134.

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BGP withdrawing the best path

I have a problem where the best path to a particular destination is being withdrawn by BGP. To explain. Site A has 2 links to site B.  1 via an eBGP peer over MPLS,  2 via an iBGP peer over a VPN backup.

I have configured the ebgp peer with a higher weight so that it is preferred.

The problem is this. When the link to the ebgp peer goes down,  the link via the ibgp peer is preferred.When the link via the ebgp peer comes back up,  the route via the ebgp peer does not go back into the BGP table (in fact it goes back for a second and is then withdrawn).

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Cisco Router Improves Business Broadband

The Cisco ASR 9000 Series Aggregation Services Router offers leading capacity, nonstop video, power efficiency, robust IPv6 support and integrated video monitoring intelligence. According to this company press release on TMC.net, NTT America is using the Cisco routing platform for carrier-grade IPv6 capability.

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