On a non broadcast network, using the keyword "neighbour" will allow the DR to start the adjacency with the indicated neighbours. Once the adjacency is completed, all ospf traffic between neighbours will be unicast. Therefore on such networks, you do not need to add the keyword "broadcast" on the frame-relay map statement for OSPF to work.
[ However not having the keyword broadcast may affect other network functions that depend on the broadcast traffic, therefore it is a good idea to put the keyword "broadcast" in the frame-map statement]. Any flaw in my logic? Evidence: (you can see here that r1 is sending to r2 (10.10.1.2 ) , r3 (10.10.1.3) and r5 (10.10.10.5) via unicast. You can see that r2 is responded with unicast. r1#debug ip pac 08:26:51: IP: s=10.10.1.1 (local), d=10.10.1.3 (Serial0/0.1), len 76, sending 08:26:51: IP: s=10.10.1.1 (local), d=10.10.1.5 (Serial0/0.1), len 76, sending 08:26:51: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0/0.1), len 76, sending 08:26:51: IP: s=10.1.1.1 (local), d=224.0.0.5 (Ethernet0/0), len 64, sending broad/multica r1#debug frame pack int ser 0/0.1 08:32:51: Serial0/0.1(o): dlci 103(0x1871), NLPID 0x3CC(IP), datagramsize 80 08:32:51: Serial0/0.1(o): dlci 105(0x1891), NLPID 0x3CC(IP), datagramsize 80 08:32:51: Serial0/0.1(o): dlci 102(0x1861), NLPID 0x3CC(IP), datagramsize 80 --- on R2# 08:43:16: IP: s=10.10.1.1 (Serial0/0), d=10.10.1.2, len 76, rcvd 0 08:43:25: IP: s=10.10.1.2 (local), d=10.10.1.1 (Serial0/0), len 68, sending 08:43:25: IP: s=137.20.20.1 (local), d=224.0.0.5 (Ethernet0/0), len 64, sending broad/mult icast ------------------------- router configuration -------- r1#show run int ser 0/0.1 Building configuration... Current configuration : 198 bytes ! interface Serial0/0.1 multipoint ip address 10.10.1.1 255.255.0.0 ip ospf priority 200 frame-relay map ip 10.10.1.2 102 frame-relay map ip 10.10.1.3 103 frame-relay map ip 10.10.1.5 105 end r2#show run int ser 0/0 Building configuration... Current configuration : 216 bytes ! interface Serial0/0 ip address 10.10.1.2 255.255.0.0 encapsulation frame-relay IETF ip ospf priority 0 ip policy route-map 10 clockrate 128000 frame-relay map ip 10.10.1.1 201 frame-relay lmi-type ansi r3#show run int ser 0/1 Building configuration... Current configuration : 216 bytes ! interface Serial0/1 ip address 10.10.1.3 255.255.0.0 encapsulation frame-relay IETF ip ospf priority 0 ip policy route-map 10 clockrate 128000 frame-relay map ip 10.10.1.1 301 frame-relay lmi-type ansi r5#show run int ser 6/0 Building configuration... Current configuration : 222 bytes ! interface Serial6/0 ip address 10.10.1.5 255.255.0.0 encapsulation frame-relay IETF ip ospf priority 0 ip policy route-map 10 serial restart-delay 0 frame-relay map ip 10.10.1.1 501 frame-relay lmi-type ansi end Thank you, Pierre-Alex Guanel Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=60715&t=60715 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
