you can try an extended ping with the record bit set, maybe it tell you all routes in that case.
""Priscilla Oppenheimer"" a icrit dans le message de news: [EMAIL PROTECTED] > Symon Thurlow wrote: > > > > Well, I would view an ISP who uses 1918 addresses in their > > public network a little warily. Traceroute etc are pretty > > fundamental problem solving tools IMHO > > Traceroute is fundamental but it's not reliable. ISPs have been infamous for > years for hiding hops to make it look like the paths through their networks > are shorter than the paths through their competitors' networks. And that's > just one of many reasons that they use private addressing. > > Priscilla > > > > > > -----Original Message----- > > From: nrf [mailto:[EMAIL PROTECTED]] > > Sent: Mon 14/10/2002 2:26 AM > > To: [EMAIL PROTECTED] > > Cc: > > Subject: Re: can I use a /31 subnet to the link between 2 > > routers eth [7:55522] > > > > > > > > ""bergenpeak"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > One drawback with 1918 addresses on intermediate physical > > interfaces is > > > that > > > this too makes troubleshooting more difficult. > > > Entities outside of > > > your domain may troublsehoot problems in or through your > > network using > > > traceroute. > > > > Like you said, troubleshooting within your own domain is > > fine. It only > > makes troubleshooting more difficult for people who are > > outside your domain. > > But unless they happen to be paying customers, do you really > > care? And even > > if they do care, do you think it's a large enough of an issue > > that a > > customer would switch to another provider because of it? > > Maybe, but > > probably not. The fact of the matter is that people who are > > outside your > > domain are not supposed to be troubleshooting stuff through > > your network, > > and you are certainly bear little if any responsibility in > > making sure that > > it is possible to do so. > > > > >Traceroute timeouts will originate from the physical > > > interface > > > the TTL expired on. If this physical interface is numbered > > using 1918, > > > then it's possible these return traceroute packets will get > > filtered > > > somewhere > > > on the return path. > > > > Again, not to be overly combative, but so what? Like I said, > > you as a > > provider don't really bear much responsibility for making sure > > that others > > outside your domain can troubleshoot through your network. > > You certainly > > aren't responsible for making sure that everybody else in the > > whole world > > can do a successful traceroute through your network. > > > > > > > > > > > > > > > > > nrf wrote: > > > > > > > > Depending on your network, that may be a perfectly > > acceptable trade-off. > > > > > > > > Or you can continue to use RFC1918 addresses on your WAN > > links, even if > > > they > > > > are on the public Internet (as long as you don't advertise > > these > > addresses > > > > to a peer ISP). Hey, why not - nobody on the Internet is > > actually > > > > interested in accessing your WAN links, they are > > interested in accessing > > > > your end-hosts. So as long as your end-point addressing > > is publicly > > > > routable, it doesn't really matter if your intermediary > > networks are > > not. > > > > > > > > ""Symon Thurlow"" wrote in message > > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > > Yes but then you lose troubleshooting capabilities etc. > > > > > > > > > > -----Original Message----- > > > > > From: nrf [mailto:[EMAIL PROTECTED]] > > > > > 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 > > > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > > > 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:[EMAIL PROTECTED]] > > > > > > 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:[EMAIL PROTECTED]] > > > > > > 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:[EMAIL PROTECTED]] 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:[EMAIL PROTECTED]] > > > > > > 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 > > > > > > > ######################################################################## > > > > > ############# > > > ############################################################################ ######### > > 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=60942&t=55586 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
