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OBGP+: A Simple Approach to Drastically Improve OBGP

IFIP International Federation for Information Processing
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  • Mathematics


n routing domains. Second, we propose OBGP+,an extended version of OBGP that exploits this PSI to compute inter-domain lightpaths in a highly efocient way. Third, in order to avoid the typical increase in the number of routing messages associated with the update of PSI, we propose to piggy-back these updates in non-dummy Keepalive messages exchanged between OBGP+ neighbors. Extensive simulations made with OPNET in the PAN European network topology reveal that: i) OBGP+ is able to drastically reduce the blocking experienced with OBGP; ii) while even needing less number of routing messages than OBGP to achieve this performance.

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