Subject: [bess] Questions on rfc7432

From: <[email-masked]>
Date: Tue, 15 Mar 2022 18:02:53 +0800 (CST)

Hi authors,

In RFC7432,  when an IMET route is sent, how to set the Tunnel Identifier of its PMSI tunnel is clearly described.

But when that IMET route (whose tunnel type is Ingress Replication) is received, it seems that there are no explicit descriptions about how to determine the corresponding PSN tunnel for that IMET route.

In ingress replication EVPN BUM mode, if the following three attributes of a received IMET route are all different from one another, 

which one should be used to determine the corresponding PSN tunnel for that IMET route?

1) the nexthop of that IMET route

2) the ORIP of that IMET route

3) the Tunnel Identifier of that IMET route's PMSI Tunnel Attribute

Which one will be considered as  the highest preferrence?

Is it clear in RFC7432 or the normal referrences of RFC7432?

Thanks,

Yubao