Re: [Idr] [bess] Comparing using the SD-WAN Overlay SAFI specified by draft-dunbar-idr-bgp-sdwan-overlay-ext with the EVPN approach described by draft-sajassi-bess-secure-evpn-00

[Linda Dunbar <[e-mail]>]

Ali,

Your draft-sajassi-bess-secure-evpn-00 defines two new Tunnel Types along with its associated sub-TLVs for The Tunnel Encapsulation Attribute [TUNNEL-ENCAP].

[Tunnel-Encap] cannot be effectively used for SD-WAN overlay network because a SD-WAN Tunnel needs to be established before data arrival. There is no routes to be associated with the SD-WAN Tunnel.

How do you address those issues?

Linda

From: Ali Sajassi (sajassi) [mailto:[e-mail]]
Sent: Wednesday, October 31, 2018 12:04 PM
To: Linda Dunbar <[e-mail]>; [e-mail]; [e-mail]
Subject: Re: [bess] Comparing using the SD-WAN Overlay SAFI specified by draft-dunbar-idr-bgp-sdwan-overlay-ext with the EVPN approach described by draft-sajassi-bess-secure-evpn-00

Hi Linda,

I haven’t read your draft yet. I am traveling now but will plan to read your draft over next couple of days and respond to your questions.

Cheers,
Ali

From: BESS <[e-mail]<mailto:[e-mail]>> on behalf of Linda Dunbar <[e-mail]<mailto:[e-mail]>>
Date: Tuesday, October 30, 2018 at 9:19 AM
To: "[e-mail]<mailto:[e-mail]>" <[e-mail]<mailto:[e-mail]>>, "[e-mail]<mailto:[e-mail]>" <[e-mail]<mailto:[e-mail]>>
Subject: [bess] Comparing using the SD-WAN Overlay SAFI specified by draft-dunbar-idr-bgp-sdwan-overlay-ext with the EVPN approach described by draft-sajassi-bess-secure-evpn-00

IDR group, BESS group,

https://datatracker.ietf.org/doc/draft-dunbar-idr-bgp-sdwan-overlay-ext/ specifies a new BGP SAFI (=74) in order to advertise a SD-WAN edge node’s capabilities in establishing SD-WAN overlay tunnels with other SD-WAN nodes through third party untrusted networks.

draft-sajassi-bess-secure-evpn-00 describes an EVPN solution for PE nodes to exchange key and policy to create private pair-wise IPsec Security Associations without IKEv2 point-to-point signaling or any other direct peer-to-peer session establishment messages.

I think those two solutions are not conflicting with each other. Actually they are compliment to each other to some degree. For example,
-        the Re-key mechanism described by draft-sajassi-bess-secure-evpn-00 can be utilized by draft-dunbar-idr-bgp-sdwan-overlay-ext
-        The SD-WAN Overlay SAFI can be useful to simplify the process on RR to re-distribute the Tunnel End properties to authorized peers.
-        When SD-WAN edge nodes use private address, or no IP address, NAT properties for the end points distribution described draft-dunbar-idr-bgp-sdwan-overlay-ext is necessary.
-        The secure channel between SD-WAN edge nodes and RR described by draft-dunbar-idr-bgp-sdwan-overlay-ext is necessary.

Any thoughts?

Thank you very much.

Linda Dunbar