Why not to use RoundRobin as falback method to backup RADIUS servers

Jan Tomášek

4. August 2006

[Figure]

Figure 1: Posible links betwen eduroam RADIUS proxy servers.

visited organization CZ NREN TOP level DE NREN home organization
1. orgA.cz (send Access-Request) -> r1.cz -> r1 -> r1.de -> r1.orgB.de
2. orgA.cz <- r1.cz <- r1 <- r1.de <- r1.orgB.de (send Access-Chalenge)
3. orgA.cz (send Access-Request) -> r2.cz -> r1 -> r2.de -> r1.orgB.de
4. orgA.cz <- r2.cz <- r1 <- r2.de <- r1.orgB.de (send Access-Chalenge)
5. orgA.cz (send Access-Request) -> r1.cz -> r2 -> r1.de -> r2.orgB.de (???)
6a. r1.de -> r1.orgB.de
... <- r1.orgB.de (send Access-Chalenge)
6b. r2 -> r2.de -> r2.orgB.de (???)
6c. r1.cz -> r1 -> r1.de -> r2.orgB.de (???)
6d. orgA.cz (re-send Access-Request) -> r2.cz -> r2 -> r1.de -> r1.orgB.de (???)

Table 1: Flow of one EAP session in eduroam infrastructure