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Re: [Int-area] Some thoughts on draft-yong-intarea-inter-sites-over-tunnels

Joe Touch <touch@isi.edu> Tue, 06 December 2016 19:38 UTC

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To: "Templin, Fred L" <Fred.L.Templin@boeing.com>, Lucy yong <lucy.yong@huawei.com>, Brian E Carpenter <brian.e.carpenter@gmail.com>, "int-area@ietf.org" <int-area@ietf.org>
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From: Joe Touch <touch@isi.edu>
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Date: Tue, 06 Dec 2016 11:35:30 -0800
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Subject: Re: [Int-area] Some thoughts on draft-yong-intarea-inter-sites-over-tunnels
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On 12/6/2016 11:31 AM, Templin, Fred L wrote:
> Hi Joe,
>
>> -----Original Message-----
>> From: Joe Touch [mailto:touch@isi.edu]
>> Sent: Tuesday, December 06, 2016 11:11 AM
>> To: Templin, Fred L <Fred.L.Templin@boeing.com>; Lucy yong <lucy.yong@huawei.com>; Brian E Carpenter
>> <brian.e.carpenter@gmail.com>; int-area@ietf.org
>> Subject: Re: [Int-area] Some thoughts on draft-yong-intarea-inter-sites-over-tunnels
>>
>> Fred,
>>
>> First, we are violently agreeing that subnet redirect works only where
>> source addresses cannot be spoofed. The problem is that this is not the
>> typical case, so it's not a generic solution IMO.
> The same can be said about ordinary host-based Redirect (only works where
> the source address cannot be spoofed). The only difference is the attack
> surface is larger for subnet redirection which is why RFC6706 does the
> due diligence of supporting data origin authentication.
Because the attack surface is larger is the reason it's an issue.

...
> AERO uses the NBMA tunnel virtual link model meaning that IPv6 ND works
> the same as for an NBMA physical link. The model supports traffic engineering,
> multi-homing, route optimization, fault tolerance, mobility management and
> security. Do you have a solution for these that does not require new code?

I already mentioned it - existing IP forwarding with virtual L2
interfaces. The existing IP forwarding supports TE, multihoming, route
optimization, etc - all without any new code.

Joe

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