HP VPN Firewall Appliances Appendix Protocol Reference

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The election votes are hello packets. Each router sends the DR elected by itself in a hello packet to all the
other routers. If two routers on the network declare themselves as the DR, the router with the higher router
priority wins. If router priorities are the same, the router with the higher router ID wins.
If a router with a higher router priority is added to the network after DR and BDR election, the router
cannot become the DR or BDR immediately because no DR election is performed for it. Therefore, the DR
of a network might not be the router with the highest priority, and the BDR might not be the router with
the second highest priority.
Protocols and standards
• RFC 1765, OSPF Database Overflow
• RFC 2328, OSPF Version 2
• RFC 3101, OSPF Not-So-Stubby Area (NSSA) Option
• RFC 3137, OSPF Stub Router Advertisement
• RFC 3630, Traffic Engineering Extensions to OSPF Version 2
• RFC 4811, OSPF Out-of-Band LSDB Resynchronization
• R F C 4 812, OSPF Restart Signaling
• RFC 4813, OSPF Link-Local Signaling