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RE: A Plea for Architectural & Specification Stability with IPv6

"Hemant Singh (shemant)" <shemant@cisco.com> Sun, 23 March 2014 23:16 UTC

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From: "Hemant Singh (shemant)" <shemant@cisco.com>
To: Glen Turner <gdt@gdt.id.au>, Ole Troan <otroan@employees.org>
Subject: RE: A Plea for Architectural & Specification Stability with IPv6
Thread-Topic: A Plea for Architectural & Specification Stability with IPv6
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Date: Sun, 23 Mar 2014 23:16:20 +0000
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Cc: RJ Atkinson <rja.lists@gmail.com>, 6man WG <ipv6@ietf.org>
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Glen,

From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Glen Turner
Sent: Sunday, March 23, 2014 5:01 PM
To: Ole Troan
Cc: 6man WG; RJ Atkinson
Subject: Re: A Plea for Architectural & Specification Stability with IPv6

>Operationally it is extremely useful to select the router's address, overriding autoconf for that address whilst allowing other machines to autoconf as per usual. Autoconfing the router's address >escalates a >simple "remote hands card replacement" into "engineer to examine configuration and test operation of all IPv6 router features after card replacement" because of the possibility that >the interface's address is >mentioned in the router's configuration (ACLs, source address for protocols, etc).

Interesting.  If I understand the issue correctly, here is my perspective.  ACL and source address for protocols should use the network interface of the card to be immune to card replacement.  It is also realistic that if a card is replaced, some configuration may need to change  The router interface can also use SLAAC to obtain its ipv6 global address.  Just have the interface also participate in routing and routing updates routes on interface reset or card of the interface getting swapped.   An example from my Cisco router interface is included below.  "ipv6 rip rip enable" configuration has the interface participate in RIPng configured on the router.

interface TenGigabitEthernet4/1/0
 mac-address 0000.0101.9843
 ipv6 address autoconfig
 ipv6 enable
ipv6 rip rip enable
end

Hemant

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