Document: draft-ietf-bess-mvpn-evpn-sr-p2mp
Title: Multicast and Ethernet VPN with Segment Routing P2MP and Ingress
Replication Reviewer: Mohit Sethi Review result: Ready

I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG. These comments
were written primarily for the benefit of the security area directors. Document
editors and WG chairs should treat these comments just like any other last-call
comments.

This draft specifies BGP protocol extensions to support multicast (MVPN) and
Ethernet VPN (EVPN) services over a Segment Routing (SR) network. It provides
the procedures for using BGP to automatically establish and manage two types of
transport tunnels for this one-to-many traffic: efficient SR
Point-to-Multipoint (P2MP) trees and Ingress Replication. The specifications
cover both SR-MPLS and SRv6 network environments. This draft is certainly not
in my area of expertise and is intended for an audience with sufficient routing
background.

The security considerations section simply refers to security considerations of
the following documents: RFC 6513 (Multicast in MPLS/BGP IP VPNs), RFC 6514
(BGP Encodings and Procedures for Multicast in MPLS/BGP IP VPNs), RFC 9524
(Segment Routing Replication for Multipoint Service Delivery), and 
draft-ietf-pim-sr-p2mp-policy (Segment Routing Point-to-Multipoint Policy).
This might be acceptable as routing domain experts will likely be familiar with
the considerations that apply to securing BGP sessions and the underlying
Segment Routing fabric. I haven't read those documents and I am not familiar
with them. I guess the risks of a compromised PE injecting malicious BGP routes
to manipulate multicast tunnels, potentially causing traffic interception,
misdirection, or DoS are either not relevant or are covered in the documents
pointed to.


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