Alvaro,

Regarding the section IPv6 Segment Routing in the Core networks, I have 
following comments:
In order to justify the requirement, I think it tries to romove all possible 
options for the designed core network:
-- MPLS: it is definitely be removed firstly.
-- L2VPN/L3VPN: it is related with MPLS. I think it is naturally removed. Then 
the designed core network has no purpose to bear L2VPN/L3VPN service. The 
network is only for IP routing.
-- IPv4: it is removed for the reason clarified by the text's self. That is, 
there should be no co-existence of IPv4 and IPv6. Or else, the use cases 
described for segment routing can only apply to IPv6. The network is only for 
IPv6 routing.
-- Multicast: Segment routing cannot cover the use case. The multicast service 
should be removed. Then network is only for IPv6 unicast routing.
Then I do not think the debates on the draft should not be simply blamed on the 
choice between IPv6 or MPLS. I wonder how many operators perfers the designed 
core network for IPv6 segment routing and whether it is necessary to introduce 
complex IPv6 segment routing fowarding for the limited scenarios.


Regards,
Zhenbin(Robin)




> Hi!
>
> This message officially starts the call for adoption for
> draft-martin-spring-segment-routing-ipv6-use-cases.
>
> Please indicate your position about adopting this use cases draft by
> end-of-day on March 27, 2014.
>
> http://tools.ietf.org/html/draft-martin-spring-segment-routing-ipv6-us
> e-ca
ses
>
> Thanks!

>From section 2.5:

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