Re: [bess] Queries and comments on draft-ietf-bess-bgp-sdwan-usage-20
"Dikshit, Saumya" <saumya.dikshit@hpe.com> Tue, 05 March 2024 02:14 UTC
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From: "Dikshit, Saumya" <saumya.dikshit@hpe.com>
To: Linda Dunbar <linda.dunbar@futurewei.com>, "sajassi@gmail.com" <sajassi@gmail.com>, John E Drake <jdrake@juniper.net>, "basil.najem@bell.ca" <basil.najem@bell.ca>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Queries and comments on draft-ietf-bess-bgp-sdwan-usage-20
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Date: Tue, 05 Mar 2024 02:14:00 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/GhUA4JG5lwTWzs0aFlzR9ADsy18>
Subject: Re: [bess] Queries and comments on draft-ietf-bess-bgp-sdwan-usage-20
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Kindly respond to the comments below. Regards, Saumya. From: Dikshit, Saumya Sent: Sunday, March 3, 2024 5:14 PM To: Linda Dunbar <linda.dunbar@futurewei.com>; sajassi@gmail.com; John E Drake <jdrake@juniper.net>; basil.najem@bell.ca Cc: bess-chairs@ietf.org; bess@ietf.org Subject: Queries and comments on draft-ietf-bess-bgp-sdwan-usage-20 Hello Authors of draft-ietf-bess-bgp-sdwan-usage, I have following comments/queries: >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-1: "over one or more underlay connectivity services by recognizing applications and determining forwarding" [SD] "Underlay" is being very generic ? it can be hierarchy of overlays on top of which "real security overlay is provisioned between the SD0WAN end points". I think it should be changed. >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-3.1.1 "As SD-WAN is an overlay network arching over multiple types of networks, MPLS L2VPN[RFC4761][RFC4762<https://datatracker.ietf.org/doc/html/rfc4762>]/L3VPN[RFC4364][RFC4659<https://datatracker.ietf.org/doc/html/rfc4659>] or pure L2 underlay can continue using the VPN ID (Virtual Private Network Identifier), VN-ID (Virtual Network Identifier), or VLAN (Virtual LAN) in the data plane to differentiate packets belonging to different SD-WAN VPNs. [SD] Why only native MPLS VPNs. EVPN based MPLS or over Vxlan fabric can also be extended over IPSec, or underlying MPLS underlay. >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-3.1.3 [SD] The section should explicitly mention, "dynamically provisioned policies based on evolving security threats and service provisioning" and also "dynamic segmentation" >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-3.1.5: "Each edge node informs the Route-Reflector (RR) [RFC4456<https://datatracker.ietf.org/doc/html/rfc4456>] on its interested SD-WAN VPNs. The RR only propagates the BGP UPDATE from an edge to others within the same SD-WAN VPN." [SD] Route-Reflector should be generalized to include Route-Servers in a over-the-WAN deployment of network fabrics. This may involve BGP instances deployments in different ASs (eBGP) >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-3.1 [SD] there is not requirement "scope for optimization of client routes at the WAN Gateway in the control plane" as the CE device can be lowly scaled w.r.t to FIB/RIB tables and performance/convergence of control plane. This one is not specific to dataplane/traffic optimization >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-4.1 : Client Service Provisioning Model [SD] Aggregation/Summarization of routes is an integral part of client provisioning >>> https://datatracker.ietf.org/doc/html/draft-ietf-bess-bgp-sdwan-usage-20#section-5.1: Why BGP as Control Plane for SD-WAN? [SD] One organic reason is that BPG is a tcp based protocol and hence can easily align with TLS based security. Regards, Saumya.
- [bess] Queries and comments on draft-ietf-bess-bg… Dikshit, Saumya
- Re: [bess] Queries and comments on draft-ietf-bes… Dikshit, Saumya