Yes but then you lose troubleshooting capabilities etc. -----Original Message----- From: nrf [mailto:noglikirf@;hotmail.com] Sent: 13 October 2002 01:45 To: [EMAIL PROTECTED] Subject: Re: can I use a /31 subnet to the link between 2 routers eth [7:55480]
Or even better, just use unnumbered interfaces. ""Bolton, Travis D [LTD]"" wrote in message news:200210130020.AAA15475@;groupstudy.com... > I would still use a /30 mask if I was using unregistered IP's. If I > was using standard IP's then maybe I would think about using the /31. > > -----Original Message----- > From: Symon Thurlow [mailto:sthurlow@;webvein.com] > Sent: Saturday, October 12, 2002 4:45 PM > To: [EMAIL PROTECTED] > Subject: RE: can I use a /31 subnet to the link between 2 routers eth > [7:55469] > > > Thanks! > > I stand corrected. > > Cheers, > > Symon > > -----Original Message----- > From: Bob McWhorter [mailto:bob@;oregontrail.net] > Sent: 12 October 2002 17:06 > To: [EMAIL PROTECTED] > Subject: RE: can I use a /31 subnet to the link between 2 routers eth > [7:55460] > > > Symon, > > Reference RFC 3021 > > Using 31-Bit Prefixes on IPv4 Point-to-Point Links > > HTH > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:nobody@;groupstudy.com] On Behalf > Of Symon Thurlow > Sent: Saturday, October 12, 2002 7:59 AM > To: [EMAIL PROTECTED] > Subject: RE: can I use a /31 subnet to the link between 2 routers eth > [7:55454] > > > Well, if you work it out: > > Obviously the first three octets wil be all 1's, so if you look at the > last octet: > > 11111110 > > Which = 254. This only leaves you with 2 addresses per subnet, and > since you need one address for the Network address and one for the > Broadcast address, you no longer have any addresses you can actually > use. > > A 30 bit subnet, where the last octet= > > 11111100 > > Equals 252. This means you have 4 addresses per subnet. Taking away > one address for the Network and one for the Broadcast address, this > leaves you one address for each end of the link. > > So I am not sure how you could use a /31. > > Symon > > -----Original Message----- > From: bbfaye [mailto:heva@;163.com] > Sent: 12 October 2002 14:54 > To: [EMAIL PROTECTED] > Subject: can I use a /31 subnet to the link between 2 routers eth > ports. [7:55450] > > > I used thought it shoul be /30 mask subnet... > but recently I saw some guy said: use /31 subnet to save the > address.... I really confusing me... > ###################################################################### > ## > ############# > Scanned for Viruses and Content and cleared by the Webvein Mail > Gateway > ######################################################################## > ############# > ######################################################################## > ############# > Scanned for Viruses and Content and cleared by the Webvein Mail > Gateway > ######################################################################## > ############# ######################################################################## ############# Scanned for Viruses and Content and cleared by the Webvein Mail Gateway ######################################################################## ############# Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55485&t=55485 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
