nanog mailing list archives
Re: Domain names for ISP infrastructure links
From: John Hawkinson <jhawk () bbnplanet com>
Date: Tue, 7 Jan 1997 17:26:27 -0500 (EST)
I'm puzzled. Connections go from router to router. How does it help to say routerb-x-y-z-routerc.blah.net when routerc will show up as the next hop in the traceroute?I think it will help when routerc fails to show up as the next hop :)
No. Traceroute gives you the incoming interface on a router. For a given incoming interface on a router there are multiple next hop routers (and multiple outgoing interfaces). Knowing that the outgoing interface that a packet came from on the previous hop router is not worth adding to the DNS. If this is a point-to-point link, as you seem to be assuming, then it should be subnetted as a /30 and you can thus subtract or add 1 to the IP address as appropriate to find the previous hop's outgoing interface, if that information is important to you. If it is a multiple-access link, then there is no chance of the incoming interface being specific to a particular previous hop anyway, so this scheme falls apart. --jhawk - - - - - - - - - - - - - - - - -
Current thread:
- Re: Domain names for ISP infrastructure links, (continued)
- Re: Domain names for ISP infrastructure links Avi Freedman (Jan 06)
- Re: Domain names for ISP infrastructure links Alex.Bligh (Jan 07)
- Re: Domain names for ISP infrastructure links Philip J. Nesser II (Jan 07)
- Re: Domain names for ISP infrastructure links Dorian R. Kim (Jan 07)
- Re: Domain names for ISP infrastructure links Philip J. Nesser II (Jan 07)
- Re: Domain names for ISP infrastructure links Dorian R. Kim (Jan 07)
- Re: Domain names for ISP infrastructure links John W. Stewart III (Jan 07)
- Re: Domain names for ISP infrastructure links Jerry Scharf (Jan 07)
- Re: Domain names for ISP infrastructure links Wayne Bouchard (Jan 07)
- Re: Domain names for ISP infrastructure links Perry E. Metzger (Jan 07)
- Re: Domain names for ISP infrastructure links John Hawkinson (Jan 07)
- Re: Domain names for ISP infrastructure links Alex.Bligh (Jan 07)
- Re: Domain names for ISP infrastructure links Alex.Bligh (Jan 08)
- Re: Domain names for ISP infrastructure links Avi Freedman (Jan 06)
- Re: Domain names for ISP infrastructure links David Carmean (Jan 07)
- Re: Domain names for ISP infrastructure links Wayne Bouchard (Jan 07)
- Re: Domain names for ISP infrastructure links Mark A. Fullmer (Jan 29)
- Re: Domain names for ISP infrastructure links Dima Volodin (Jan 06)
- Re: Domain names for ISP infrastructure links Andrew Partan (Jan 11)