hey, Paul, what's going on? now I'm more confused than ever. how does PIM relate to EIGRP behavior on NMBA networks? I interpreted the original question and CCO quote as discussing how EIGRP sets its hello timers based on the physical/data link layer of SMDS or frame relay, which can be configured (in cooperation with the telco) as a multicast net or a series of point to point links. my admittedly brief reading indicates that given the right configurations on the telco side, both SMDS and frame can become layer two multicast networks, behaving in a similar manner to ethernet, in that packets are automatically replicated to all end points. While this is rare in the frame relay world, because it involves enlisting the option that permits globally unique DLCIs, it is not uncommon in the SMDS world. EIGRP apparently understands these kinds of layer two configuration options, and adjusts its timers accordingly. am I completely off the wall here? Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Paul Werner Sent: Saturday, August 04, 2001 11:37 PM To: [EMAIL PROTECTED] Subject: Re: Subject: EIGRP's interpretation of NBMA and "disabling [7:14934] I read this a different way. I interpreted the author's discussion of "physical multicasting" to mean multicast routing. Multicast routing can be turned on and off individual interfaces. Moreoever, when you get to the discussion on CCO about optimizing multicast routing, there is this section: http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/c book/ciproute.htm#xtocid16743149 I agree the wording could be better. As far as disabling multicast from an interface, my gut reaction would be, why would you want to? HTH, Paul Werner > On Cisco's site, I've been searching for information as to when the > hello > interval is set to 5 seconds and when it is set to 60 seconds. Hellos > are > sent every 5 seconds except on low-speed, NBMA media. Low- speed is > defined > as 1.544 Mbps and under. No problems there. > > What I don't understand is this statement: > > "Note that for the purposes of EIGRP, Frame Relay and Switched > Multimegabit > Data Service (SMDS) networks may or may not be considered to be NBMA. > These > networks are considered NBMA if the interface has not been configured to > use > physical multicasting; otherwise they are not considered NBMA." > > How can you configure an interface not to use multicasting? This is > something I haven't come across how to do yet. Is this configuring > EIGRP > multicasts to use unicasts (I think I saw something like that last night > but > I was too tired to comprehend it or even remember where I saw it). > > > -- Leigh Anne ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=14956&t=14956 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
