En riponse ` VoIP Guy : > It doesn't work in Cisco routers.
Actually, Cisco supports this 3021... http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/12 2t2/ft31addr.htm My apologies, I didn't know this url before posting... Nicolas. > > ""Carroll Kong"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Law of subnets is a tradeoff. Bigger subnets, have higher > > efficiency, at the cost of bigger broadcast domains. Smaller subnets > have > > abysmal efficiency, at the benefit of smaller broadcast domains. > > /31 is a new RFC proposed rule which eliminates the loss of > > effiency of 50% to.. 0%. > > /30 has 2 usable addresses but loses 2 for broadcast and > > network. So, you need 4 ips to make the subnet, but you only can > use > > 2. 50% efficiency. /31 is going to let you take 2, and use 2, and > ignore > > the broadcast and network need. This is ideal for point to point. > > > > At 08:32 AM 11/30/01 -0500, VoIP Guy wrote: > > >Maybe I'm missing something, but there are only 2 useable addresses > in a > > >/30, and only 2 interfaces participating in a point-to-point link, so > how > > >are there 50% of the addresses wasted. > > > > > >Steve > > > > > > > > >""MADMAN"" wrote in message > > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > Point to point connections, with a /30 you waste 50% of the > > > > avaivalable addresses. > > > > > > > > Dave > > > > > > > > Nicolas FEVRIER wrote: > > > > > > > > > > Hi group, > > > > > > > > > > I'm puzzled by the use of /31 subnets... > > > > > Anybody can explain me the benefits of such a subnet on an > interface > ? > > > > > > > > > > Thanxx. > > > > > > > > > > Nicolas. > > > > -- > > > > David Madland > > > > Sr. Network Engineer > > > > CCIE# 2016 > > > > Qwest Communications Int. Inc. > > > > [EMAIL PROTECTED] > > > > 612-664-3367 > > > > > > > > "Emotion should reflect reason not guide it" > > -Carroll Kong Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27821&t=27742 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
