Re: [Int-area] 答复: 答复: Is the UDP destination port number resource running out?// re: I-D Action: draft-ietf-intarea-gue-04.txt

Joe Touch <touch@isi.edu> Sat, 20 May 2017 04:15 UTC

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To: Xuxiaohu <xuxiaohu@huawei.com>, Tom Herbert <tom@herbertland.com>
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From: Joe Touch <touch@isi.edu>
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Date: Fri, 19 May 2017 21:15:01 -0700
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On 5/19/2017 8:57 PM, Xuxiaohu wrote:
> Hi Joe,
>
>> -----邮件原件-----
>> 发件人: Joe Touch [mailto:touch@isi.edu]
>> 发送时间: 2017年5月20日 11:41
>> 收件人: Xuxiaohu; Tom Herbert
>> 抄送: int-area@ietf.org
>> 主题: Re: [Int-area] 答复: Is the UDP destination port number resource running
>> out?// re: I-D Action: draft-ietf-intarea-gue-04.txt
>>
>>
>>
>> On 5/19/2017 6:39 PM, Xuxiaohu wrote:
>>> If the saving is beneficial, it'd better to assign a dedicated port
>>> number for each UDP payload type( e.g., IP packet), rather than
>>> combining the UDP port number dedicated for GUE and the version field
>>> within the GUE header together to indicate whether the UDP payload is
>>> GUE or IP (or even other payload type if the GUE is devoted to help
>>> save the UDP port number resource for the IETF community:))
>> FWIW, IANA strives to assign one port for a service.
> Great. Hence IPvx should be taken as a service rather than taking IPvx and GUE as a service, IMO.
GUE is supposed to be both signalling and content (data), where the data
are IP packets.

Take away the IP part and GUE isn't an E anymore.
>> Services are expected to have version fields and subtype demultiplexing
>> indicators, to so that all message variants of current and future versions can use
>> a single port number.
> Sure, the version field within the IPvx packet could be used for demultiplexing purpose.

That demultiplexes within IPvx. There still needs to be a way to
demultiplex non-IPvx packets (control) from IPvx.

Joe