It looks like on page 433, he's describing a situation where the network does not have any broadcast capabilities. Broadcast networks are able to utilize the multicast feature(224.0.0.5) to send hello packets while NBMA and point to multipoint will utilize unicast hello packets because they have had to learn each other by manual configuration(neighbor) or by inverse arp.
I hope I stated it correctly. You can search for RFC 2178 for further info or clarification. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jim Bond Sent: Saturday, October 20, 2001 10:52 PM To: [EMAIL PROTECTED] Subject: ospf point-to-multipoint [7:23655] Hello, On Jeff Doyle's TCP/IP volume I, P417 it says point-to-multipoint is multicast; P433 it says it's unicast. Which one is correct? Thanks in advance. Jim __________________________________________________ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=23658&t=23655 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

