RE: Questions on draft-ietf-l3vpn-vpn-vr-02.txt

["Vishal Sharma" <v.sharma at ieee.org>]

Paul and co.,

Perhaps I should clarify one of my questions...

With respect to the independence of the CE-PE routing protocol
from the PE-PE routing protocol, when you said "PE-to-PE
routing protocol" in 2.5.1. were you referring to the routing protocol
running between the VRs (on the PEs) corresponding to
the VPN of which the CE is a part?

If so, then I can see that these two protocol MAY be independent.

If not, then I am confused, because my understadning is
that the true PE-to-PE routing protocol
(presumably the IGP instance which lets all PEs and Ps in the SP network
learn
reachability to one another) should _always_ be independent of
the CE-to-PE (read CE-to-corresponding VR on attached PE) routing
protocol.

Thanks,
-Vishal

> -----Original Message-----
> From: Vishal Sharma [mailto:v.sharma at ieee.org]
> Sent: Thursday, June 17, 2004 10:58 AM
> To: L3PPVPN; Paul Knight
> Subject: Questions on draft-ietf-l3vpn-vpn-vr-02.txt
>
>
> Hi Paul and co-authors,
>
> Could you please clarify a few things in the latest version of this
> document:
>
> - Sec. 2.5.1. states that the
> "The routing
>    protocol between the CE and the VR running on the PE MAY be
>    independent of the PE-to-PE routing. "
>
> Why is this a MAY? Would one not want the routing protocol
> between the CE and its corresponding VR on the PE to be always
> independent of the PE-to-PE routing protocol?
> When is there a case when these protocols are not independent?
>
> - Sec. 2.5.3, I assume when "CE-to-PE routing" is used, it actually
> means "routing between the CE and the VR (on the PE to which the CE
> is attached) corresponding to the VPN of which the CE is a part"
> Is this correct?
>
> If so, it might be useful for the document to clarify somewhere
> up front that when "CE-to-PE" routing is used, this is what is
> implied.
>
> - Sec. 2.5.3, "VRs
>    of customer VPNs MAY use the backbone VR for routing across the
>    backbone." probably needs to say "the backbone VR network".
>
> Thanks,
> -Vishal
>