Shuping,
The CRH can appear in a packet along with any valid combination of extension
headers.
Ron
Juniper Business Use Only
From: ipv6 <ipv6-boun...@ietf.org> On Behalf Of Pengshuping (Peng Shuping)
Sent: Friday, May 22, 2020 11:12 AM
To: Ron Bonica <rbonica=40juniper....@dmarc.ietf.org>; Chengli (Cheng Li)
<c...@huawei.com>; 6man <6...@ietf.org>; spring@ietf.org
Cc: spring@ietf.org
Subject: RE: How CRH support SFC/Segment Endpoint option?
[External Email. Be cautious of content]
Hi Ron,
If using DOH, then we would have DOH (VPN) + DOH (SFC) + RH per packet in some
circumstances, right? What if more (ever-emerging) services are required? Not
sure about the forwarding efficiency.
Best regards,
Shuping
From: ipv6 [mailto:ipv6-boun...@ietf.org] On Behalf Of Ron Bonica
Sent: Friday, May 22, 2020 10:17 PM
To: Chengli (Cheng Li) <c...@huawei.com<mailto:c...@huawei.com>>; 6man
<6...@ietf.org<mailto:6...@ietf.org>>; spring@ietf.org<mailto:spring@ietf.org>
Cc: spring@ietf.org<mailto:spring@ietf.org>
Subject: RE: How CRH support SFC/Segment Endpoint option?
Cheng,
The sole purpose of a Routing header is to steer a packet along a specified
path to its destination. It shouldn't attempt to do any more than that.
The CRH does not attempt to deliver service function information to service
function instances. However, it is compatible with:
* The Network Service Header (NSH)
* The Destination Options header that precedes the Routing header
Both of these can be used to deliver service function information to service
function instances.
Ron
Juniper Business Use Only
From: Chengli (Cheng Li) <c...@huawei.com<mailto:c...@huawei.com>>
Sent: Friday, May 22, 2020 2:56 AM
To: 6man <6...@ietf.org<mailto:6...@ietf.org>>;
spring@ietf.org<mailto:spring@ietf.org>; Ron Bonica
<rbon...@juniper.net<mailto:rbon...@juniper.net>>
Cc: spring@ietf.org<mailto:spring@ietf.org>
Subject: How CRH support SFC/Segment Endpoint option?
[External Email. Be cautious of content]
Hi Ron,
When reading the CRH draft, I have a question about how CRH support SFC?
For example, we have a SID List [S1, S2, S3, S4, S5], and S3 is a SFC related
SID, how to indicate that? By PSSI? [1]
But how to know which segment endpoint node/egress node should process this
PSSI? At the beginning of the SRm6 design, this is described in [2]. But you
deleted the containers [2].
Without that, I don't really understand how SFC can be supported.
Best,
Cheng
[1].
https://tools.ietf.org/html/draft-bonica-spring-sr-mapped-six-01#section-4.1<https://urldefense.com/v3/__https:/tools.ietf.org/html/draft-bonica-spring-sr-mapped-six-01*section-4.1__;Iw!!NEt6yMaO-gk!UD4vf0darQ9cskFhH1fJ9jwZJ-nIciQxgVnf1219YuyyaNcgvNdRUdkjwP15i-Xa$>
[2].
https://tools.ietf.org/rfcdiff?url2=draft-bonica-6man-seg-end-opt-04..txt<https://urldefense.com/v3/__https:/tools.ietf.org/rfcdiff?url2=draft-bonica-6man-seg-end-opt-04.txt__;!!NEt6yMaO-gk!UD4vf0darQ9cskFhH1fJ9jwZJ-nIciQxgVnf1219YuyyaNcgvNdRUdkjwNmXwyHT$>.
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