Re: Will we use tokens or not?
Once upon a time there was an 802.4 token bus -- logically a ring.
So far, what I see here looks more like a Buffer/Register Insertion
Ring.
It is important to focus on "moving the ball down the field."
BJ Lee wrote:
>
> I would also consider the term "token" as strictly associated with the ring
> access
> control mechanism. Stretching my imagination a bit, the spatial reuse
> property
> of RPR (which enables multiple concurrent transmissions on the ring) is
> effectively
> equivalent to employing multiple tokens.
>
> The second type of "token" Offer referred to should be categorized as
> "control frames"
> for the purposes such as topology discovery, (un)fairness enforcement, and
> link failure
> detection, etc.
>
> Regards,
> BJ
>
> -----Original Message-----
> From: owner-stds-802-rprsg@xxxxxxxx
> [mailto:owner-stds-802-rprsg@xxxxxxxx]On Behalf Of RDLove
> Sent: November 20, 2000 10:03 AM
> To: Yongbum Kim; pazy@xxxxxxxxxxxxxxxxxx; stds-802-rprsg@xxxxxxxx
> Subject: Re: Will we use tokens or not?
>
> Offer, Yong, in tweny years of working with token ring I never heard of your
> "second type of token" referred to as a token. It certainly would not be
> called that by old IEEE 802.5 participants.
>
> I realize that my answer begs the question as to whether this type of frame
> will be used. I will leave that question to be answered in the Working
> Group.
>
> Best regards,
>
> Robert D. Love
> President, LAN Connect Consultants
> 7105 Leveret Circle Raleigh, NC 27615
> Phone: 919 848-6773 Mobile: 919 810-7816
> email: rdlove@xxxxxxxx Fax: 720 222-0900
> ----- Original Message -----
> From: Yongbum Kim <ybkim@xxxxxxxxxxx>
> To: <pazy@xxxxxxxxxxxxxxxxxx>; <stds-802-rprsg@xxxxxxxx>
> Sent: Monday, November 20, 2000 9:15 AM
> Subject: RE: Will we use tokens or not?
>
> >
> > Dear Offer,
> >
> > As far as I am concerned, the second type of "token" you mentioned
> > is rolled in to Ring Access method and is in the same context as Ethernet
> > MAC control frame (802.3x). Would I call it a token? No. But someone
> > could argue this to be some sort of token.
> >
> > regards,
> >
> > Yong.
> >
> > -----Original Message-----
> > From: Offer Pazy [SMTP:pazy@xxxxxxxxxxxxxxxxxx]
> > Sent: Thursday, November 16, 2000 10:14 PM
> > To: stds-802-rprsg@xxxxxxxx
> > Subject: Will we use tokens or not?
> >
> > In the email discussion about RPR Vs Ethernet positioning, Yong had made
> > the claim that RPR does not use tokens. I would like to get a
> > clarification on this.
> >
> > There are two types of tokens in a ring architecture. One is used as a
> > "ring master" which grants the permission for a node to transmit.
> > Clearly, RPR will not have such a token since the whole idea of spatial
> > reuse is that more than one node can transmit at the same time.
> >
> > There is a second type of a token, a "control token" which is passed
> > between the ring nodes carrying all sorts of control information
> > (health, BW demands, and so forth). Are we saying that we won't have
> > such a token in RPR? If so, and being a new comer, I would appreciate
> > getting a pointer to any previous contribution to the group discussing
> > this issue (or one which documents this decision).
> >
> > Thanks,
> >
> > Offer Pazy
> > Sr. Product Manager
> > Native Networks
> >
> > 15 Gonen St.
> > Petah Tikva 49170
> > Israel
> > Tel: +972 3 921-0010 Ext. 229
> > Fax: +972 3 921-0080
> > pazy@xxxxxxxxxxxxxxxxxx
> > http://www.nativenetworks.com
> > << File: ATT00014.htm; charset = Windows-1252 >>
--
Dr. Gary A. Nelson
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