Point-to-(whatever) network types don't form a DR, so the priority command is irrelevant.
Your spokes won't peer because they're more than one hop away from each other (if they do peer, you have likely done something wrong at L2/DLCI side). 224.0.0.x messages have a TTL of 1. There are ways to still make things work, but the easiest/least work IMHO is to use the non-broadcast network type with the hub as the DR. This is the default network type for multipoint frame-relay interfaces anyway. HTH, Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPexpert VP - Curriculum Development IPexpert Sr. Technical Instructor [EMAIL PROTECTED] http://www.ipexpert.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jack Poon Sent: Monday, March 05, 2007 4:14 AM To: [email protected] Subject: [OSL | CCIE_RS] OSPF with Frame-Relay Hub and Spoke Dear all, Consider a Frame Relay Hub and Spoke configuration. R2 --------- interface Serial0/1/0.256 multipoint ip address 150.50.100.2 255.255.255.224 ip rip advertise 60 no ip split-horizon ip ospf network point-to-multipoint frame-relay map ip 150.50.100.2 205 frame-relay map ip 150.50.100.5 205 broadcast frame-relay map ip 150.50.100.6 206 broadcast end ++++++++++++++++++++++++++++++++++ R5 --------- interface Serial0/1/0 ip address 150.50.100.5 255.255.255.224 encapsulation frame-relay frame-relay map ip 150.50.100.2 502 broadcast frame-relay map ip 150.50.100.5 502 frame-relay map ip 150.50.100.6 502 broadcast no frame-relay inverse-arp end ++++++++++++++++++++++++++++++++++ R6 --------- interface Serial0/1/0 ip address 150.50.100.6 255.255.255.224 encapsulation frame-relay frame-relay map ip 150.50.100.2 602 broadcast frame-relay map ip 150.50.100.5 602 broadcast frame-relay map ip 150.50.100.6 602 no frame-relay inverse-arp end +++++++++++++++++++++++++++++++++ My question is in such situation, how can we configure OSPF. I have try to add "ip ospf network point-to-multipoint" to all router's interface, and ip ospf priority 0 to R5 and R6. The result is R2 can form neighbor with R5 and R6. But R5 cannot form neighbor with R6 Is it okay? Even I static configure "neighbor <R6_IP> cost x" in R5 router ospf 1, it still not work. I also try "ip ospf network broadcast" to all router's interface, it still the same. It is simply not necessary for R5 and R6 form neighbor? Or I miss something important? Thanks a lot Best Regards, Jack
