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External routing

Using a private IP space on the network will introduce new issues on routing when connecting the network to the Internet using multiple ISP connections. Some nodes have an external default gateway that is injected into OSPF. These routes are propagated through the network so that each node has one or more routes to the Internet. Currently there is no smart algorithm to decide which one to use (or to use a particular route to the Internet for a particular user). Several options are being investigated: tunnels (e.g. PPTP), source routing and the use of proxy servers.

Also, discussions with RIPE are planned to address the possibility of obtaining a block of IPv4 numbers together with an AS number. This will ease some of the ISP connection problems.

Rudi van Drunen 2003-04-08