From: Ahmed Mamoor Amimi (mamoor@xxxxxxxx)
Date: Thu Apr 04 2002 - 12:43:38 GMT-3
TrCRF is in SRT mode by default and BrCRF is in SRB mode by default.
-Mamoor
----- Original Message -----
From: DAN DORTON <DHSTS68@dhs.state.il.us>
To: <Parry.Chua@compaq.com>; <Guy.Lupi@eurekaggn.com>;
<Geoffrey.KIM@iname.com>
Cc: <ccielab@groupstudy.com>
Sent: Thursday, April 04, 2002 7:05 PM
Subject: RE: 3920 operation questions
> You can if they are the same trbrf & the same subnet, but different ring
numbers (trcrfs) you can either.
>
> A: Run the trcrf in SRT
>
> B: Run the trcrf in SRB mode (default) & specify multiring all on the
router rings, so they can build RIF fields & talk to each other.
>
> Dan
>
> >>> "Lupi, Guy" <Guy.Lupi@eurekaggn.com> 04/03/02 08:08PM >>>
> I have no idea, although what you are saying sounds right. I wonder if it
> would work either way, although now that you mention it, it does make a
lot
> more sense to use the following. But like I said, I don't really know. I
> have some virtual rack time coming up and I want to be ready to set this
> stuff up, I have used a 3920 before, but only the 3920, no routers
connected
> to it.
>
> r1 (trbrf 15 trcrf 15)
>
> int to0
> ip addr 6.6.6.6 255.255.255.0>
> multiring ip
> source-bridge 15 21 16
> source-bridge spanning
>
> r2 (trbrf 15 trcrf 16)
>
> int to0
> ip addr 6.6.6.7 255.255.255.0
> multiring ip
> source-bridge 16 21 15
> source-bridge spanning
>
> -----Original Message-----
> From: Geoffrey KIM
> To: Lupi, Guy; 'Chua, Parry '
> Cc: ccielab@groupstudy.com
> Sent: 4/3/2002 9:05 PM
> Subject: RE: 3920 operation questions
>
> Guy,
>
> What I don't understand is why you need the 'source bridge ring 12'?
> Can't you directly SRB between the ring 15 and ring 16 via the BRF15
> (i.e., bridge 21 in decimal)?
>
> Thanks,
> Geoffrey
>
>
> > -----Original Message-----
> > From: Lupi, Guy [mailto:Guy.Lupi@eurekaggn.com]
> > Sent: Thursday, April 04, 2002 10:15 AM
> > To: 'Geoffrey KIM '; 'Chua, Parry '
> > Cc: 'ccielab@groupstudy.com '
> > Subject: RE: 3920 operation questions
> >
> >
> > I was told today that the bridge numbers are in hex on the
> > 3920, so you
> > would have to convert them. I believe the following is the proper
> > configuration, I am sure someone will correct me if I am wrong:
> >
> > r1 (trbrf 15 trcrf 15)
> > source bridge ring 12
> > !
> > int to0
> > ip addr 6.6.6.6 255.255.255.0
> > multiring ip
> > source-bridge 15 21 12
> > source-bridge spanning
> >
> > r2 (trbrf 15 trcrf 16)
> > source-bridge ring 12
> > !
> > int to0
> > ip addr 6.6.6.7 255.255.255.0
> > multiring ip
> > source-bridge 16 21 12
> > source-bridge spanning
> >
> >
> > -----Original Message-----
> > From: Geoffrey KIM
> > To: Chua, Parry; Lupi, Guy
> > Cc: ccielab@groupstudy.com
> > Sent: 4/3/2002 8:09 PM
> > Subject: RE: 3920 operation questions
> >
> > Parry,
> >
> > What's the correct configuration for the second case then? Is it:
> >
> > R1 - CRF15 - BRF15
> > ------------------
> > int to0
> > source-bridge 15 15 16
> >
> > R2 - CRF16 - BRF15
> > ------------------
> > int to0
> > source-bridge 16 15 15
> >
> > ?
> >
> > Thanks in advance,
> > Geoffrey
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On
> > > Behalf Of Chua, Parry
> > > Sent: Thursday, April 04, 2002 9:47 AM
> > > To: Lupi, Guy; ccielab@groupstudy.com
> > > Subject: RE: 3920 operation questions
> > >
> > >
> > > Hi
> > >
> > > point:
> > > 1. is OK
> > > 2. Is incorrect, it is like a two ring attach to a bridge, it
> > > is in the same subnet.
> > > but you need to configure multiring at interface to work
> > > for SRB as far as IP and IPX
> > > is concern.
> > > 3. Is OK.
> > >
> > > Parry Chua
> > >
> > > -----Original Message-----
> > > From: Lupi, Guy [mailto:Guy.Lupi@eurekaggn.com]
> > > Sent: Wednesday, April 03, 2002 11:36 PM
> > > To: 'ccielab@groupstudy.com'
> > > Subject: 3920 operation questions
> > >
> > >
> > > I have a few scenarios that I want to put out there to see if my
> > > understanding is correct:
> > >
> > > 1. If you have 2 routers, each with a token ring interface
> > > to the 3920, and
> > > they are placed in the same trbrf trcrf, then this is just
> > > like having an
> > > MAU, the routers can exchange routing information and will be
> > > on the same IP
> > > subnet. This is the default configuration.
> > >
> > > 2. If you have 2 routers, each with a token ring interface
> > > to the 3920, one
> > > is placed in trbrf15 trcrf15, and one is placed in trbrf15
> > > trcrf16, then the
> > > routers will be on different ip subnets, but can do SRB. The srb
> > > configurations would be as follows:
> > >
> > > r1
> > > source-bridge ring-group 12
> > > int to0
> > > source-bridge 15 15 12
> > >
> > > r2
> > > source-bridge ring-group 12
> > > int to0
> > > source-bridge 16 15 12
> > >
> > > 3. If you have 2 routers, each with a token ring interface
> > > to the 3920, one
> > > is placed in trbrf15 trcrf15, and one is placed in trbrf16
> > > trcrf16. The
> > > routers cannot do srb, this would be just like setting up 2
> > vlans on a
> > > Catalyst switch, intervlan communication is not possible.
> > >
> > > I appreciate any comments on this, I can set up the 3920 just
> > > fine, but I am
> > > trying to understand the effect that each setup has on srb
> > and regular
> > > traffic on the token ring segments that are attached.
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