Re: [bess] Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html
"Dikshit, Saumya" <saumya.dikshit@hpe.com> Tue, 05 March 2024 02:23 UTC
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From: "Dikshit, Saumya" <saumya.dikshit@hpe.com>
To: "Jorge Rabadan (Nokia)" <jorge.rabadan=40nokia.com@dmarc.ietf.org>, "Allu, Ramaprasad" <ramprasad.na@hpe.com>, "bess@ietf.org" <bess@ietf.org>, "draft-sajassi-bess-evpn-ip-aliasing@ietf.org" <draft-sajassi-bess-evpn-ip-aliasing@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html
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Date: Tue, 05 Mar 2024 02:22:36 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/gi0_mKA2Vz1Xdfe59_-B5gssYG0>
Subject: Re: [bess] Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html
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Hi Jorge, Is this the same RD for IP VRF (uniquely defined for IP-AD per EVI route), that should be leveraged for host routes in Route Type-2 and Prefix Routes in Route Type-5 ? Is that the safe assumption (as per rfc9135/9134) ? In case yes, then If we have a unique RD for the IP-VRF, what RD should be used for the NLRI in the Route-Type-2 carrying MAC/IP for tied to MAC-VRF and IP-VRF ? Should it be MAC-VRF RD or IP-VRF RD. Regards, Saumya. From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Jorge Rabadan (Nokia) Sent: Tuesday, March 5, 2024 1:57 AM To: Allu, Ramaprasad <ramprasad.na@hpe.com>; bess@ietf.org; draft-sajassi-bess-evpn-ip-aliasing@ietf.org Cc: bess-chairs@ietf.org; Dikshit, Saumya <saumya.dikshit@hpe.com> Subject: Re: [bess] Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html Hi Ramaprasad, About this: “If MPLS label field is not considered for BGP route key, then BGP RIB will have only one route entry at any given point of time. That is, IP A-D per EVI route overwrites Ethernet AD per EVI and vice-versa if same RD is used for IP-VRF and MAC-VRF.” The Ethernet AD per EVI route and IP AD per EVI routes must use different RDs. It was sort of implicit, since the former one uses the RD of the MAC-VRF and the latter the RD of the IP-VRF, but we added this in rev 01 to make sure there is no misunderstanding: * The Route-Distinguisher is for the corresponding IP-VRF. The Route-Distinguisher allocated for the IP-VRF MUST be unique in the PE. Hope it helps. Thank you, Jorge From: Allu, Ramaprasad <ramprasad.na@hpe.com<mailto:ramprasad.na@hpe.com>> Date: Sunday, March 3, 2024 at 10:04 PM To: bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, draft-sajassi-bess-evpn-ip-aliasing@ietf.org<mailto:draft-sajassi-bess-evpn-ip-aliasing@ietf.org> <draft-sajassi-bess-evpn-ip-aliasing@ietf.org<mailto:draft-sajassi-bess-evpn-ip-aliasing@ietf.org>> Cc: bess-chairs@ietf.org<mailto:bess-chairs@ietf.org> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, Dikshit, Saumya <saumya.dikshit@hpe.com<mailto:saumya.dikshit@hpe.com>> Subject: Re: Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html<https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html> You don't often get email from ramprasad.na@hpe.com<mailto:ramprasad.na@hpe.com>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information. Hi Authors, Gentle reminder. Can you please take a look at it and respond to below query? Thanks, Ramaprasad From: Allu, Ramaprasad <ramprasad.na@hpe.com<mailto:ramprasad.na@hpe.com>> Date: Wednesday, 21 February 2024 at 5:40 PM To: bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, draft-sajassi-bess-evpn-ip-aliasing@ietf.org<mailto:draft-sajassi-bess-evpn-ip-aliasing@ietf.org> <draft-sajassi-bess-evpn-ip-aliasing@ietf.org<mailto:draft-sajassi-bess-evpn-ip-aliasing@ietf.org>> Cc: bess-chairs@ietf.org<mailto:bess-chairs@ietf.org> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, Dikshit, Saumya <saumya.dikshit@hpe.com<mailto:saumya.dikshit@hpe.com>> Subject: Queries to authors of https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html<https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html> Hi Authors of draft https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html<https://www.ietf.org/archive/id/draft-ietf-bess-evpn-ip-aliasing-00.html> I have a following query on the draft. Please help with your response. Context of section https://www.ietf.org/archive/id/draft-sajassi-bess-evpn-ip-aliasing-09.html#section-3.1<https://www.ietf.org/archive/id/draft-sajassi-bess-evpn-ip-aliasing-09.html#section-3.1>, In the section, it is mentioned that the construction of the IP A-D per EVI route is same as that of the Ethernet A-D per EVI route. The NLRI consists of the following, +---------------------------------------+ | Route Distinguisher (RD) (8 octets) | +---------------------------------------+ |Ethernet Segment Identifier (10 octets)| +---------------------------------------+ | Ethernet Tag ID (4 octets) | +---------------------------------------+ | MPLS Label (3 octets) | +---------------------------------------+ And as per https://www.rfc-editor.org/rfc/rfc7432.html#section-7.1<https://www.rfc-editor.org/rfc/rfc7432.html#section-7.1>, “ for the purpose of BGP route key processing, only the Ethernet Segment Identifier and the Ethernet Tag ID are considered to be part of the prefix in the NLRI. The MPLS Label field is to be treated as a route attribute as opposed to being part of the route” If MPLS label field is not considered for BGP route key, then BGP RIB will have only one route entry at any given point of time. That is, IP A-D per EVI route overwrites Ethernet AD per EVI and vice-versa if same RD is used for IP-VRF and MAC-VRF. Is there any reason for explicit mention of not using MPLS label field as key for BGP route or not carrying two labels one for Ethernet A-D per EVI and another for IP-AD per VRF? In this case, I see only MPLS Label (VNI in case of VXLAN) is the distinguisher if same RD is used for both IP-VRF and MAC-VRF. And to keep two separate routes in BGP RIB, we need to use MPLS label also one of the keys in addition to RD, ESI and ETAG fields. Or Carry both the labels and extended communities as part of single A-D per EVI route and store single route in the global BGP RIB. Please let me know what you think. Thanks, Ramaprasad
- [bess] Queries to authors of https://www.ietf.org… Allu, Ramaprasad
- Re: [bess] Queries to authors of https://www.ietf… Allu, Ramaprasad
- Re: [bess] Queries to authors of https://www.ietf… Jorge Rabadan (Nokia)
- Re: [bess] Queries to authors of https://www.ietf… Dikshit, Saumya
- Re: [bess] Queries to authors of https://www.ietf… Dikshit, Saumya
- Re: [bess] Queries to authors of https://www.ietf… Jorge Rabadan (Nokia)
- Re: [bess] Queries to authors of https://www.ietf… Dikshit, Saumya
- Re: [bess] Queries to authors of https://www.ietf… Jorge Rabadan (Nokia)
- Re: [bess] Queries to authors of https://www.ietf… Dikshit, Saumya
- [bess] Queries to authors of https://www.ietf.org… Dikshit, Saumya
- [bess] https://www.ietf.org/archive/id/draft-ietf… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Jorge Rabadan (Nokia)
- [bess] Queries to authors of https://www.ietf.org… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Jorge Rabadan (Nokia)
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Dikshit, Saumya
- [bess] Re: https://www.ietf.org/archive/id/draft-… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Dikshit, Saumya
- [bess] Re: Queries to authors of https://www.ietf… Dikshit, Saumya