why? because! check the RFC - the explanation is there.
Chuck ""Cisco Nuts"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Oh! BTW: Forgot to ask you as to why OSPF lists the route as a /32 and not > as a /24 as it should be in a point-to-multipoint mode? > > O 7.7.7.3/32 [110/128] via 7.7.7.1, 00:07:18, Serial0 > O 7.7.7.1/32 [110/64] via 7.7.7.1, 00:07:18, Serial0 > > Thank you. > > > >From: "Chuck Larrieu" > >Reply-To: "Chuck Larrieu" > >To: [EMAIL PROTECTED] > >Subject: Re: ospf in a non-broadcast mode not working? [7:32077] > >Date: Tue, 15 Jan 2002 17:34:27 -0500 > > > >split horizon is NEVER an issue with OSPF. Nor with BGP > > > >If you are using the physical interfaces in all cases, and you are trying > >to > >ping the directly connected interface of the other side, your pings will > >fail. This is true of all routing protocols. At least according to the > >extensive experimentation and resulting observation when I did these tests > >last September. I've never brought it up as a topic of discussion because I > >could not come up with a conceptual framework that explained the > >phenomenon. > >I do have a note indicating that static maps must exist for all directly > >connected addresses to overcome this problem. > > > >betcha if you use an extended ping, and use something other than the > >directly connected interface as your source address it works fine. > > > >Chuck > > > > > >""Cisco Nuts"" wrote in message > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > Hello, > > > I have RTA and RTC as spoke routers connected to a FR router. I have RTB > > > connected as the hub. I have OSPF configed as a non-broadcast mode on > >all > > > three routers. They are all on the same subnet, 7.7.7.0/24 > > > The routing table of RTB shows networks from RTA and RTC and I can ping > > > successfully to either network. > > > The routing table of RTA and RTC also show networks from each other's > > > networks. But I am not able to ping to the other side?? > > > I configured a no ip split-horizon on RTB, the hub router and also > >neigbor > > > commands on all 3 routers but no luck. > > > > > > Why would the routes show up in the routing table but pings be > > > unsuccessfull? Any solution for this. > > > Thank you. > > > > > > RTA config for eg. > > > 16.0.0.0/32 is subnetted, 1 subnets > > > O 16.16.16.1 [110/129] via 7.7.7.1, 01:30:04, Serial0 > > > O 192.168.10.0/24 [110/134] via 7.7.7.1, 01:30:05, Serial0 > > > 7.0.0.0/24 is subnetted, 1 subnets > > > C 7.7.7.0 is directly connected, Serial0 > > > 9.0.0.0/32 is subnetted, 1 subnets > > > O 9.9.9.9 [110/65] via 7.7.7.1, 01:30:05, Serial0 > > > 15.0.0.0/32 is subnetted, 1 subnets > > > C 15.15.15.1 is directly connected, Loopback15 > > > > > > RTA#ping 192.168.10.2 > > > > > > RTA#sh ip ospf nei > > > > > > Neighbor ID Pri State Dead Time Address > >Interface > > > N/A 0 ATTEMPT/DROTHER - 7.7.7.2 > >Serial0 > > > 9.9.9.9 1 FULL/BDR 00:01:56 7.7.7.1 > >Serial0 > > > > > > > > > Type escape sequence to abort. > > > Sending 5, 100-byte ICMP Echos to 192.168.10.2, timeout is 2 seconds: > > > ..... > > > Success rate is 0 percent (0/5) > > > > > > > > > _________________________________________________________________ > > > MSN Photos is the easiest way to share and print your photos: > > > http://photos.msn.com/support/worldwide.aspx > _________________________________________________________________ > Join the worlds largest e-mail service with MSN Hotmail. > http://www.hotmail.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=32097&t=32077 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
