Re: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022
"Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net> Tue, 25 October 2022 12:04 UTC
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "Dongjie (Jimmy)" <jie.dong=40huawei.com@dmarc.ietf.org>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022
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Date: Tue, 25 Oct 2022 12:04:11 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/ZhpnA9iDvJHqIzVMsa_EQUdvhJA>
Subject: Re: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022
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Hi Jie, Please see zzh> below. Juniper Business Use Only From: Dongjie (Jimmy) <jie.dong=40huawei.com@dmarc.ietf.org> Sent: Wednesday, October 19, 2022 4:56 AM To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; Susan Hares <shares@ndzh.com>; idr@ietf.org Subject: RE: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022 [External Email. Be cautious of content] Hi Jeffrey, Please see inline: From: Jeffrey (Zhaohui) Zhang [mailto:zzhang=40juniper.net@dmarc.ietf.org] Sent: Wednesday, October 19, 2022 11:05 AM To: Dongjie (Jimmy) <jie.dong@huawei.com<mailto:jie.dong@huawei.com>>; Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; idr@ietf.org<mailto:idr@ietf.org> Subject: RE: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022 Hi Jie, Draft-dong says: Currently BGP does not have a generic mechanism of designating the set of nodes to which the information is to be distributed. Route Target (RT) as defined in [RFC4364<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/rfc4364__;!!NEt6yMaO-gk!Hh1rXhslU4YoT-0qPG_PzdQ_j8k_T86Upirn45RkObVBMmZh0yBlOxnQWiKM0qe4YGOT378Nf-D0EetP_26E2Jr76dTUSDDn$>] was designed for the matching of VPN routes into the target VPN Routing and Forwarding tables (VRFs) on the PE nodes. [I-D.ietf-idr-segment-routing-te-policy<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-dong-idr-node-target-ext-comm-05*ref-I-D.ietf-idr-segment-routing-te-policy__;Iw!!NEt6yMaO-gk!Hh1rXhslU4YoT-0qPG_PzdQ_j8k_T86Upirn45RkObVBMmZh0yBlOxnQWiKM0qe4YGOT378Nf-D0EetP_26E2Jr76ZoarSbF$>] introduces the mechanism of steering the SR Policy information to the target head end node based on RT, it is only applicable to the SR Policy Address Family. Although it is possible to reuse RT to control the distribution of non-VPN information to one or a group of receiving nodes, such mechanism is not applicable when the information to be distributed is VPN-specific and is advertised with another set of RTs for the VRF matching, as the matching or any of the VPN RT in the BGP route would result in that route being imported to a local VRF, regardless of whether the receiving node is the target node or not. Thus a general mechanism which is independent from the control of VPN route to VRF import is needed. The red text is not correct. RFC 6514 already used <address:0> RT to target routes to a node, and as you say in the purple text the RT mechanism can be extended to non-VPN. [Jie] I guess you are referring to the use of ASBR Import RT? My understanding is that it is still an normal RT type (no new EC type assigned), thus the semantic and behavior would be the same as the RT. Zzh> Indeed; the normal RT type can be used to target routes to a node (or a set of node if they are configured to import the same RT). The problem is as described in this section, if you use this RT together with another RT of specific VPN for distributing routes to one VRF of the target node, as a result other nodes with the same VPN would also import this route to their VRFs. Zzh> You would NOT use this with another RT of a VPN - that's the whole purpose of draft-zzhang. The routes will include an Extended Community derived from the VPN RT, which is used by the targeted nodes to import the routes into the VRF. As for the green text, draft-zzhang has a simple solution for it. [Jie] I've read your draft. I don't think it address the "same" use case, such as targeted distribution of BGP Flowspec. Zzh> Please see above. Zzh> Thanks. Zzh> Jeffrey Best regards, Jie Thanks. Jeffrey Juniper Business Use Only From: Dongjie (Jimmy) <jie.dong=40huawei.com@dmarc.ietf.org<mailto:jie.dong=40huawei.com@dmarc.ietf.org>> Sent: Monday, October 17, 2022 11:32 PM To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>; Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; idr@ietf.org<mailto:idr@ietf.org> Subject: RE: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022 [External Email. Be cautious of content] Hi Jeffrey, Thanks for the information about another draft which is targeted at similar problems. My reading is that it clearly shows in several use cases, there is requirement to define a separate EC type to control the propagation and importation of routes to targeted network nodes, and keep the semantics of RT as is for the importation of routes to specific routing tables. The new EC type introduced in draft-dong-idr-node-target-ext-comm can achieve targeted route distribution without introducing additional policy configurations on network nodes. Best regards, Jie From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jeffrey (Zhaohui) Zhang Sent: Tuesday, October 18, 2022 9:30 AM To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; idr@ietf.org<mailto:idr@ietf.org> Subject: Re: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022 Almost missed it ... (sorry - have not got to check IDR list for a while). Please note that I pointed out that there are (better?) alternatives than this: https://mailarchive.ietf.org/arch/msg/idr/tDDCFD7VftNMnYOqC0O3mSS0l0Q/<https://urldefense.com/v3/__https:/mailarchive.ietf.org/arch/msg/idr/tDDCFD7VftNMnYOqC0O3mSS0l0Q/__;!!NEt6yMaO-gk!Cgi7cyYJrEAuIxJiWl_OE5CbegKAEAzcViF9NcaVArITeXZdhwApF2v_KeTpWWYNKBOzvURpisakpyALQjMNvXww_gCzhtB4$>. I also made a request to adopt the alternative solution (I'll reply to that email thread). Thanks. Jeffrey Juniper Business Use Only From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of Susan Hares Sent: Wednesday, October 12, 2022 6:40 PM To: idr@ietf.org<mailto:idr@ietf.org> Subject: Re: [Idr] draft-dong-idr-node-target-ext-comm-05.txt - WG Adoption and IPR call (9/27 to 10/11/2022) - Extended an Additional week to 10/18/2022 [External Email. Be cautious of content] I am extending this WG call 1 more week since the WG adoption call occurred during Chinese Holidays (October 1-7). Cheerily, Susan Hares
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Susan Hares
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey (Zhaohui) Zhang
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Gert Doering
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Robert Raszuk
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Randy Bush
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey (Zhaohui) Zhang
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Gyan Mishra
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Robert Raszuk
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Gyan Mishra
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey Haas
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Robert Raszuk
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey Haas
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Robert Raszuk
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey Haas
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Robert Raszuk
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey (Zhaohui) Zhang
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Jeffrey (Zhaohui) Zhang
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Dongjie (Jimmy)
- Re: [Idr] draft-dong-idr-node-target-ext-comm-05.… Gyan Mishra