Re: [bess] AD Review of draft-ietf-bess-evpn-vpws-07

Himanshu,

I don’t think we should make the Eth-tag a MUST be 24 bit. It should be MAY  but if you decide to use 24 bits, it MUST be right aligned.

Regards,
Patrice Brissette

On 2017-02-21, 2:51 PM, "Shah, Himanshu" <hshah@ciena.com> wrote:

    ‘MAY’ does not work. 
    It has to be ‘MUST’, IMO. 

    Thanks,
    Himanshu

    On 2/21/17, 2:22 PM, "BESS on behalf of Patrice Brissette (pbrisset)" <bess-bounces@ietf.org on behalf of pbrisset@cisco.com> wrote:

        Folks,

        Why don’t we simply mention that the Eth–Tag is a 32 bit value and MAY be set to a 24 bits instance
        When 24 bits value is used is MAY be right aligned.

        Regards,
        Patrice Brissette

        On 2017-02-21, 2:18 PM, "BESS on behalf of Sami Boutros" <bess-bounces@ietf.org on behalf of sboutros@vmware.com> wrote:

            Hi John,

            I can add that the value is from 0 to 0x00ffffff, will that work?

            Thanks,

            Sami
            On 2/21/17, 10:56 AM, "John E Drake" <jdrake@juniper.net> wrote:

            >Sami,
            >
            >Snipped, comment inline
            >
            >Yours Irrespectively,
            >
            >John
            >
            >> >
            >> >> Ethernet Tag ID 32-bit field MUST be set to the 24-bit VPWS service instance
            >> identifier value."
            >> >
            >> >
            >> >
            >> >Ok, but you still didn’t mention how the 24-bit value is to be aligned in the 32-
            >> bit field.  I’m guessing there will be some 0-padding, but will that the at the
            >> beginning or the end?
            >> >
            >> 
            >> I made the VPWS service instance identifier a 32-bit value in the new draft.
            >> 
            >
            >[JD]   I don't think you can do this as there are multiple implementations that use 24 bits  
            >
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