Re: [Idr] [bess] Type 1 RD for Pure IPv6 network -- EVPN

Hi Tulasi,

In pure IPv6 networks, I think using the BGP identifier in place of the IP
address part in the type 1 RD should suffice for all practical purposes.
The only catch is, if it is an AS-wide unique BGP identifier [RFC6286],
then it is not an IP address 'per se'. But, I think it makes no difference
from an interoperability standpoint..

Perhaps, in line with RFC6286, we should redefine the IP address part of
the type 1 RD as just a 4-octet, unsigned, non-zero integer..

Regards,
Muthu

On Fri, Jan 22, 2021 at 11:31 AM TULASI RAM REDDY <tulasiramireddy@gmail.com>
wrote:

> Hi All,
>
> In a pure IPv6 network, how do one expect to construct the Type 1 RD.
> As per EVPN RFC 7432 for EAD per ES, it should be Type 1 RD, but if the
> loopback address is only IPv6 then what is the expectation here?
> Should we use BGP router ID(32bit) here?
>
> From RFC7432: EVPN
>
> 8.2.1 <https://tools.ietf.org/html/rfc7432#section-8.2.1>.  Constructing Ethernet A-D per Ethernet Segment Route
>
>    The Route Distinguisher (RD) MUST be a Type 1 RD [RFC4364 <https://tools.ietf.org/html/rfc4364>].  The
>    *value field comprises an IP address of the PE (typically, the
>    loopback address)* followed by a number unique to the PE.
>
>
> Thanks,
> TULASI RAMI REDDY N
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