Subject: Re: [sidr] wglc for draft-ietf-sidr-bgpsec-protocol-11

From: "Sriram, Kotikalapudi" <[email-masked]>
Date: Tue, 3 Mar 2015 23:43:16 +0000

On page 5, draft-ietf-sidr-bgpsec-protocol-11 says: 

A BGP speaker SHOULD
   NOT advertise the capability of BGPsec support for a particular AFI
   unless it has also advertised the multiprotocol extension capability
   for the same AFI combination [3].

I interpret this to mean that if a BGPsec speaker intends to send IPv4 updates 
to a peer, it should advertise multiprotocol extension capability with AFI = 1. 
That is so even when it intends to send only IPv4 updates. 
The fact that multiprotocol extension capability (with AFI = 1) is advertised, does it mean that 
MP_REACH_NLRI (see page 3, RFC 4760) should be used for announcing IPv4 prefixes?
Just trying to clarify because it wasn’t clear to me reading RFC 4760.

Sriram