I raised an issue awhile back regarding the Router Lifetime field and
the AdvDefaultLifetime parameter and the wording of Section 4.2 in RFC
2461. I insert the e-mail below from Erik Nordmark discussing this.
Would it be possible to consider changing the wording in Section 4.2 per
the e-mail below? Thanks.
Regards,
Pete
--> INSERT e-mail
> What I mean to say is that the parameter AdvDefaultLifetime MUST be
> either zero or between MaxRtrAdvInterval and 9000 seconds (IPv6) per
> RFC 2461. Same thing for IPv4 per RFC 1256 (only the parameter is
> Advertisement Lifetime). The inconsistency (for lack of a better word)
> is that the Router Lifetime field is 16 bits and if set to anything
> greater than 9000 seconds then this would violate the specifications.
> So, if it is set to 18.2 hours (e.g., for some wireless cellular
> links) it violates the specs.
Thanks, now I understand your point.
While the wording might be unfortunate and perhaps confusing, saying
that 2^^16 seconds is 18.2 hours is correct. Even though the sender will
not use more than 9000 seconds the protocol doesn't, and presumably
shouldn't, have the receivers reject RAs with a router lifetime that is
larger per the "consevative in what you send;
liberal in what you accept" principle.
So if we change the sentence in 4.2 from:
The maximum value corresponds to 18.2 hours.
to
The field can contain values up to 65535 and receivers should
handle any value, while the sending rules in section 6 limit
the lifetime to 9000 seconds.
would that be better?
Erik
--> END INSERT e-mail
-------------------------
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
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Sent: Wednesday, October 22, 2003 3:56 PM
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Subject: I-D ACTION:draft-soliman-ipv6-2461-bis-00.txt
A New Internet-Draft is available from the on-line Internet-Drafts
directories.
Title : Neighbor Discovery for IP version 6 (IPv6)
Author(s) : T. Narten, et. al.
Filename : draft-soliman-ipv6-2461-bis-00.txt
Pages : 86
Date : 2003-10-22
This document specifies the Neighbor Discovery protocol for IP
Version 6. IPv6 nodes on the same link use Neighbor Discovery to
discover each other's presence, to determine each other's link-layer
addresses, to find routers and to maintain reachability information
about the paths to active neighbors.
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