rfc4941bis: On the use of multiple addresses

Fernando Gont <fgont@si6networks.com> Thu, 30 January 2020 22:54 UTC

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From: Fernando Gont <fgont@si6networks.com>
Subject: rfc4941bis: On the use of multiple addresses
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Date: Thu, 30 Jan 2020 19:49:08 -0300
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Based on the recent discussion regarding the possible impact of the use 
of multiple addresses, I suggest we include the following text in 
Section 4 of rfc4941bis:

"Network deployments are currently recommended to provide multiple IPv6 
addresses from each prefix to general-purpose hosts. However, in some 
scenarios, use of a large number of IPv6 addresses may have negative 
implications on some network devices (e.g. [RFC6583]), exacerbate other 
operational problems (e.g. [draft-ietf-mboned-ieee802-mcast-problems]) 
and/or may lead to traffic employing these addresses being dropped by 
devices that enforcing port security that may enforce a limit on the 
maximum number of configured addresses per host (e.g. [RFC7039]). A 
discussion on possible approaches to allow for unconstrained use of IPv6 
addresses can be found in [RFC7934]"



Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
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