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) 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) Thanks Rajesh -----Original Message----- From: Peter Psenak <[email protected]> Sent: Thursday, September 10, 2020 3:36 PM To: Rajesh M <[email protected]>; SPRING WG <[email protected]> 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
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