nanog mailing list archives
Re: IPv6 Default Allocation - What size allocation for Loopback Address
From: joel jaeggli <joelja () bogus com>
Date: Sun, 12 Oct 2014 15:44:17 -0700
On 10/12/14 3:00 PM, William Herrin wrote:
On Sat, Oct 11, 2014 at 1:41 AM, Faisal Imtiaz <faisal () snappytelecom net> wrote:A follow up question on this topic.. For Router Loopback Address .... what is wisdom in allocating a /64 vs /128 ? (the BCOP document suggests this, but does not offer any explanation or merits of one over the other).Hi Faisal, One of the viewpoints held by some in the IETF is that an IPv6 address is not 128 bits. Rather, it is 64 bits of network space and 64 bits of host space. I'm told this viewpoint is responsible for the existence of a 128 bit address instead of IPv6 using 64 bit addresses. If you follow that reasoning, the subnet mask should always be /64, no matter where the address is assigned.
https://tools.ietf.org/html/rfc6164 Is a standards track document. it is imho a repudiation of the assumptions about the dimensions of the host field.
There are, of course, excellent operational reasons not to religiously follow that plan. Regards, Bill Herrin
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Current thread:
- Re: IPv6 Default Allocation - What size allocation for Loopback Address, (continued)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Faisal Imtiaz (Oct 10)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Roland Dobbins (Oct 10)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Tim Raphael (Oct 11)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Roland Dobbins (Oct 11)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Sander Steffann (Oct 12)
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- Re: IPv6 Default Allocation - What size allocation for Loopback Address Randy Carpenter (Oct 12)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Enno Rey (Oct 13)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Måns Nilsson (Oct 10)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Frank Habicht (Oct 11)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address William Herrin (Oct 12)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address joel jaeggli (Oct 12)
- Re: IPv6 Default Allocation - What size allocation for Loopback Address Mark Andrews (Oct 12)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 10)
- Re: IPv6 Default Allocation - What size allocation are you giving out Roland Dobbins (Oct 10)
- Re: IPv6 Default Allocation - What size allocation are you giving out William Herrin (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Baldur Norddahl (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Roland Dobbins (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Tore Anderson (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Lee (Oct 11)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)