Hi Authors:
I look at the following SIDs function again, and I indeed fail to find useful
meaning of the combination of USP & USD, as well as {PSP & USP & USD}.
Given that there are no 2 or more successive SRH instances in one packet in
this draft, So Regardless of which specific packet whose SRH instance include
the same SID below in last location, the final behavior of these SIDs in
different packet’s SRHs are always the same, either USP or USD, it is up to the
execution order among the USD and USP, because these SIDs are executed in last
node of segment list and their pre-condition is same, i.e “ if {segment left
==0}” in same location in Pseudocode module.
Do you give a use case to explain for them, for example, the one SID below of
one SRH instance has behavior for USP, at the same time, the same SID of
another SRH instance of another packet has behavior for USD.
0x001E | End with USP&USD
0x0022 | End.X with USP&USD
0x0026 | End.T with USP&USD
Cheers!
Wang Weibin
From: Wang, Weibin (NSB - CN/Shanghai)
Sent: 2019年12月13日 8:06
To: 'Ron Bonica' <[email protected]>; [email protected]
Subject: RE: draft-ietf-spring-srv6-network-programming - Extraneous functions
Hi Ron,
I think the same SID，such as you mention, May be included in different SRH of
different packets, so the same SID have different behavior in different packet
whose SRH include it.
Cheers!
Wang Weibin
From: spring <[email protected]<mailto:[email protected]>> On
Behalf Of Ron Bonica
Sent: 2019年12月13日 3:56
To: [email protected]<mailto:[email protected]>
Subject: [spring] draft-ietf-spring-srv6-network-programming - Extraneous
functions
Folks,
Are there use cases for the following functions:
* 0x001F �C END with PSP, USP and USD
* 0x0023 �C END.X with PSP, USP and USD
* 0x0027 - END.X with PSP, USP and USD
It seems that if the SRH was removed at the penultimate segment, there is
little sense in removing it again at the ultimate segment.
Ron
Juniper Business Use Only
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