don't know if you have already received an answer to this, but one good source is the CCO configuration guides. in the case of SMDS you can read it at: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/smds.htm the quote you provide does talk about the physical ( carrier ) level, and with SMDS there are means of configuring it from the carrier side as a series of point to point links or as a single multipoint domain. "SMDS group addresses allow a single address to refer to multiple CPE stations, which specify the group address in the Destination Address field of the PDU. The network makes multiple copies of the PDU, which are delivered to all members of the group. Group addresses reduce the amount of network resources required for distributing routing information, resolving addresses, and dynamically discovering network resources. SMDS group addressing is analogous to multicasting on LANs. " in your quote, I believe that the "interface" referred to is the physical interface, i.e. the interface connecting to the SMDS CPE - probably a(n) HSSI. make sense? Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Leigh Anne Chisholm Sent: Thursday, August 02, 2001 12:16 PM To: [EMAIL PROTECTED] Subject: EIGRP's interpretation of NBMA and "disabling multicasting"? [7:14693] 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=14909&t=14909 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
