From: Jack Heney (jheneyccie@xxxxxxxxxxx)
Date: Tue Oct 03 2000 - 16:20:28 GMT-3
Thanks for the response, but I have one more question...Ethernet
microsegmentation allows for full-duplex operation, and I understand that
Token ring does as well...If I have multiple ports in a trcrf, and all
stations on a ring share a token, then how does the switch support full
duplex operation...The fact that these stations share a token seems to
indicate that full-duplex would be impossible, or if full-duplex is
possible, it seems that the stations couldn't possibly share a token.
Thanks again,
Jack Heney
>From: "Asbjorn Hojmark" <Asbjorn@Hojmark.ORG>
>Reply-To: "Asbjorn Hojmark" <Asbjorn@Hojmark.ORG>
>To: "'Jack Heney'" <jheneyccie@hotmail.com>
>CC: <ccielab@groupstudy.com>
>Subject: RE: Token Ring Vlans
>Date: Tue, 3 Oct 2000 20:56:36 +0200
>
> > I'm a little confused about the use of the term "vlan" in a
> > token ring environment....
>
>I tend to think of CRF VLANs as virtual rings and BRF VLANs
>as a domain of bridged rings, a broadcast domain. I don't know
>why they chose to call CRFs VLANs instead of VRINGs.
>
> > I have always understood a vlan to be a broadcast domain,
> > where a routing function is required to get from one vlan
> > to another...
>
>That's true for BRF VLANs.
>
> > Since multiple trcrf's can be connected via the same parent
> > trbrf, is a group of rings that share a bridge (trbrf) a
> > single broadfcast domain?
>
>Yes.
>
> > If so, what advantage is gained by creating these vlans?
>
>It's like micro-segmentation for token-ring. Remember that
>stations on a ring share a token and that some frames are
>local to a ring while others are global for the bridged
>domain.
>
> > Also, can rings that don't share the same parent trbrf
> > communicate without some sort of routing occurring
>
>No.
>
>HTH,
>-A
>--
>Heroes: Vint Cerf & Bob Kahn, Leonard Kleinrock, Robert Metcalfe
>Links : http://www.hojmark.org/networking/
>
>
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