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

"Patrice Brissette (pbrisset)" <pbrisset@cisco.com> Tue, 21 February 2017 19:22 UTC

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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: Sami Boutros <sboutros@vmware.com>, John E Drake <jdrake@juniper.net>, "Alvaro Retana (aretana)" <aretana@cisco.com>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: [bess] AD Review of draft-ietf-bess-evpn-vpws-07
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Date: Tue, 21 Feb 2017 19:22:11 +0000
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Cc: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] AD Review of draft-ietf-bess-evpn-vpws-07
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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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