From: Bob Chahal (bob.chahal@xxxxxxxxxxxx)
Date: Sun Jul 01 2001 - 09:18:52 GMT-3
Rick,
Ok, the bit where you say "and if the IP stations are not inserting RIFs
(transparent bridging not SRB), then bitswap will be needed", then to me
that means we are not talking about SRB at all but just Transparent bridging
between ethernet and token-ring segments. If I had a token-ring/ethernet
router I'd test this out until I was satisfied.
In the config example below
source-bridge transparent 10 30 1 1
source-bridge ring-group 10
!
int to0
source-bridge 1 1 10
source-bridge spanning
!
int e0
bridge-group 1
!
bridge 1 protocol ieee
bridge 1 bitswap-layer3-addresses Would you need this in this example?
Thanks for you time on this.
Bob
----- Original Message -----
From: "Rick Burts" <burts@mentortech.com>
To: "Bob Chahal" <bob.chahal@ntlworld.com>
Cc: "Brian" <signal@shreve.net>; <ccielab@groupstudy.com>
Sent: Sunday, July 01, 2001 12:41 PM
Subject: Re: bitswap-layer3-addresses
> Bob
>
> your question seems to imply that transparent bridging and SR/TLB are
> different and separate. Transparent bridging is part of SR/TLB.
>
> So to be as explicit as possible in answering your question: yes, if
> there are IP devices on Ethernet and Token Ring, if IP is being bridged
> (not routed), and if the IP stations are not inserting RIFs (transparent
> bridging not SRB), then bitswap will be needed.
>
> Rick
>
> Rick Burts, CCSI CCIE 4615 burts@mentortech.com
> Mentor Technologies 240-568-6500 ext 6652
> 133 National Business Parkway 240-568-6515 fax
> Annapolis Junction, Md 20701
>
> Chesapeake Network Solutions has now become Mentor Technologies.
> Mentor Technologies is a certified Cisco Training Partner and also
> a Cisco Professional Services partner.
> We offer most of the Cisco training courses.
> We also offer training in Checkpoint Firewall software and
> Fore Systems (now Marconi) and MicroMuse.
> We also provide network consulting services including
> design, management, and problem solving.
> We have 21 CCIEs on our staff.
> We offer the breakthrough VLAB remote access technology for
> access to practice configuration on real equipment.
>
> On Sat, 30 Jun 2001, Bob Chahal wrote:
>
> > So are you saying that it is needed for SR/TLB when there are IP devices
on
> > the token-ring and ethernet segments that are being bridged whether it's
> > transparent bridging or SR/TLB?
> >
> > ----- Original Message -----
> > From: "Rick Burts" <burts@mentortech.com>
> > To: "Brian" <signal@shreve.net>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Saturday, June 30, 2001 4:56 PM
> > Subject: Re: bitswap-layer3-addresses
> >
> >
> > > There have been a couple answers to this but I would like to take a
> > > slightly different approach to this. bitswap-layer3-address is
> > > needed when transparent bridging is used between Ethernet and Token
> > > Ring. (The reason it is needed is to process when a MAC address is
> > > included in the payload of the frame as well as in the data link
header
> > > and this will compensate for the canonical/non-canonical bit
ordering.)
> > > It is obvious that SRT is doing transparent bridging and needs
bitswap.
> > > It may not be quite as obvious (but it is true) that SR/TLB is also
> > > doing transparent bridging and may need bitswap.
> > >
> > > Rick
> > >
> > > Rick Burts, CCSI CCIE 4615 burts@mentortech.com
> > > Mentor Technologies 240-568-6500 ext 6652
> > > 133 National Business Parkway 240-568-6515 fax
> > > Annapolis Junction, Md 20701
> > >
> > > Chesapeake Network Solutions has now become Mentor Technologies.
> > > Mentor Technologies is a certified Cisco Training Partner and also
> > > a Cisco Professional Services partner.
> > > We offer most of the Cisco training courses.
> > > We also offer training in Checkpoint Firewall software and
> > > Fore Systems (now Marconi) and MicroMuse.
> > > We also provide network consulting services including
> > > design, management, and problem solving.
> > > We have 21 CCIEs on our staff.
> > > We offer the breakthrough VLAB remote access technology for
> > > access to practice configuration on real equipment.
> > >
> > > On Tue, 26 Jun 2001, Brian wrote:
> > >
> > > > A few questions about the "bitswap-layer3-addresses" directive.
> > > >
> > > > I am just trying to nail down when this command is really
> > > > required. I know that if I have a token ring interface
> > > > and a ethernet interface on a router, and I am doing SRT
> > > > between them, then I need it like so:
> > > >
> > > >
> > > > int token0
> > > > bridge-group 1
> > > >
> > > > int ethernet0
> > > > bridge group 1
> > > >
> > > > bridge 1 protocol ieee
> > > > bridge 1 bitswap-layer3-addresses
> > > >
> > > >
> > > > But the documentation at cisco.com mentions SR/TB as well.
> > > >
> > > > I am confused as to when you would use it with SR/TB, can
> > > > someone show a quick example of where you would want to use
> > > > it with something other than SRT?
> > > >
> > > > Brian
> > > >
> > > > -----------------------------------------------
> > > > Brian Feeny e:signal@shreve.net
> > > > CCNP+Voice/ATM/Security p:318.222.2638x109
> > > > CCDP f:318.221.6612
> > > > Network Administrator
> > > > ShreveNet Inc. (ASN 11881)
> > > > **Please read:http://www.groupstudy.com/list/posting.html
> > > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:31:28 GMT-3