Just tried it and the router dosen't even allow an interface to use a /31 mask, even with ip subnet-zero enabled.
""VoIP Guy"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I read the RFC, so I guess it can be used. My bad. > > AM I correct in saying that one interface will be assigned the all zero > subnet as it's IP and the other will be assigned the broadcast IP address > for that subnet? > > Steve > > > > ""VoIP Guy"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > I know that, but the network and broadcast addresses are unusable. Thus > the > > two good addresses for hosts. > > ""Craig Columbus"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > With a /30 you use 4 IP addresses (network, 2 node, 1 broadcast). You > > save > > > addresses with a /31. > > > Here's a link with more info: > > > > > > http://www.ietf.org/rfc/rfc3021.txt?number=3021 > > > > > > Thanks, > > > Craig > > > > > > At 08:32 AM 11/30/2001 -0500, you 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" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27807&t=27802 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
