Re: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07
Rajesh M <mrajesh@juniper.net> Thu, 10 September 2020 13:55 UTC
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From: Rajesh M <mrajesh@juniper.net>
To: "Pablo Camarillo (pcamaril)" <pcamaril=40cisco.com@dmarc.ietf.org>, Peter Psenak <ppsenak@cisco.com>, SPRING WG <spring@ietf.org>
Thread-Topic: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/SA-hvmGaA7ojqA7tgewDOpKFkUg>
Subject: Re: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07
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Thanks pablo , now clear about uA sid. Better to add more explanations in the draft, so that draft readers don’t bother you 😊 A generic question: 1) what is the difference between 42 | 0x002A | uN | [This.ID] | 43| 0x002B | uN (S&L+End) | [This.ID] | 2) So these two does not support PSP & USD flavors ? 42 | 0x002A | uN | [This.ID] | 51 | 0x0033 | uA | [This.ID] | Thanks Rajesh Juniper Business Use Only From: Pablo Camarillo (pcamaril) <pcamaril=40cisco.com@dmarc.ietf.org> Sent: Thursday, September 10, 2020 6:21 PM To: Rajesh M <mrajesh@juniper.net>; Peter Psenak <ppsenak@cisco.com>; SPRING WG <spring@ietf.org> Subject: RE: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07 [External Email. Be cautious of content] Hi Rajesh, Inline [PC]. Thanks. From: spring <spring-bounces@ietf.org<mailto:spring-bounces@ietf.org>> On Behalf Of Rajesh M Sent: jueves, 10 de septiembre de 2020 12:45 To: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org<mailto:ppsenak=40cisco.com@dmarc.ietf.org>>; SPRING WG <spring@ietf.org<mailto:spring@ietf.org>> Subject: Re: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07 Hi peter, 1) What is the difference between these 2 SIDs 42 | 0x002A | uN | [This.ID] | 46 | 0x002E | uN (S&L+End PSP/USP) | [This.ID] | uN SID (End behavior with NEXT-CSID, PSP and USD flavors) , uN (S&L+End PSP/USD) [PC] This is a typo. The example in 4.1.1 needs to be corrected to use | 48 | 0x0030 | uN (S&L+End PSP/USD) | [This.ID] | 2) just to continue below discussion, can you confirm 51 | 0x0033 | uA - here FIB must have 2001:db8:0:FNAJ::/64 route (16 bit Compressed-SID) 52 | 0x0034 | uA (S&X+End.X) - here FIB must have 2001:db8:0:0N00:FNAJ::/80 route (32 bit Compressed-SID) [PC] Not the case. The FIB entry must have 2001:db8:0:FNAJ::/64. This is independent on which flavor the node supports 51-59. Note that it may also be possible for a packet to arrive to the node with uN uSID followed by a uA. In such case the packet arriving at the node is 2001:db8:0:0N00:FNAJ::, whereas 0N00 is a uN at node N, and FNAJ is a uA at node N toward neighbor J I can add a note about this in the next revision of the draft. Thanks Rajesh -----Original Message----- From: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org<mailto:ppsenak=40cisco.com@dmarc.ietf.org>> Sent: Thursday, September 10, 2020 3:36 PM To: Rajesh M <mrajesh@juniper.net<mailto:mrajesh@juniper.net>>; SPRING WG <spring@ietf.org<mailto:spring@ietf.org>> Subject: Re: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-07 [External Email. Be cautious of content] Hi Rajesh, On 10/09/2020 03:38, Rajesh M wrote: > Hi All, > > *Section 4.1.21:* > > ** > > In control plane uA SID is advertised with value > 2001:db8:0:*0N00:FNAJ::* > > ** > > *in FIB entry it is represent with value *2001:db8:0*:FNAJ::/64* > > Note: From a formal viewpoint, a uA SID of node N is defined by the > > local FIB entry B:uA/64 of N (i.e. this definition is independent from > any uN SID of node N). > > a) why such discrepancy ? between control plane and forwarding plane. It's explained in the section 4.1.2.1: "In order to signal in ISIS a container SID with the same routable semantics as End.X" In other words, we wanted to keep the consistency in a way the SID is advertised for different SID types (e.g. END.X and uA). thanks, Peter > > b) for uA SID Forwarding happens based upon 2001:db8:0/48 ? not based > upon 2001:db8:0:*0N00 (uN SID) ?* > > **uSID block: 2001:db8:0::/48** > > **for uA SID if forwarding is based upon**2001:db8:0/48 then > Compressed-SID can be 16 bit > > for uA SID if forwarding is based upon**2001:db8:0:*0N00 then > *Compressed-SID must be 32 bit** > > ** > > Thanks > > Rajesh > > ** > > > Juniper Business Use Only > Juniper Business Use Only
- [spring] draft-filsfils-spring-net-pgm-extension-… Rajesh M
- Re: [spring] draft-filsfils-spring-net-pgm-extens… Peter Psenak
- Re: [spring] draft-filsfils-spring-net-pgm-extens… Rajesh M
- Re: [spring] draft-filsfils-spring-net-pgm-extens… Pablo Camarillo (pcamaril)
- Re: [spring] draft-filsfils-spring-net-pgm-extens… Rajesh M