From: mcaplan.cs@xxxxxxxxxxxxxxx
Date: Thu Jun 14 2001 - 13:47:40 GMT-3
Aaryn,
I'de be interested to hear about those caveats you mention. I know
transparent bridging between TR and Eth must be possible because even the
CCO Bridging and IBM Networking config guide discusses the use of OUI in
converting from TR to Eth in the paragraph about SRT. I am trying to do that
kind of transparent bridging myself in with the following scenario.
bvi1=10.1.1.2 bvi=10.1.1.4
10.1.1.5
R2(to0)--------------(to0)R4(s1)-------(s0)R1(e0)-------RHOST router acting
as host
I have got IRB enabled on R2, R4 and R1 and put all BVI interfaces into the
same subnet to test bridging across what I intend to be a single broadcast
domain. I can ping R4 from the RHOST, but not R2. A debug shows that the ARP
request from RHOST actually gets across to R2 ok, but for some reason R2
doesn't enter into the ARP cache, and so the resulting ping fails. Here is
the debug arp failure
*Mar 9 05:30:13.314: IP ARP req filtered src 10.1.1.5 0000.0c8d.a396, dst
10.1.1.2 0000.0000.0040 wrong cable, interface TokenRing0
*Mar 9 05:31:13.314: IP ARP req filtered src 10.1.1.5 0000.0c8d.a396, dst
10.1.1.2 0000.0000.0040 wrong cable, interface TokenRing0
The fact that the ARP request got through shows that bridging is working for
the broadcast, so its not a bit-swap issue. Any help would be appreciated.
See below for configs
Thanks
Mark
hostname r2
!
bridge irb
!
interface TokenRing0
bridge-group 1
!
interface BVI1
ip address 10.1.1.2 255.255.255.0
!
bridge 1 protocol ieee
bridge 1 route ip
hostname r4
!
bridge irb
!
interface Serial1
bridge-group 1
!
interface TokenRing0
bridge-group 1
!
interface BVI1
ip address 10.1.1.4 255.255.255.0
!
bridge 1 protocol ieee
bridge 1 route ip
hostname r1
no ip routing
!
interface Ethernet0/0
bridge-group 1
!
interface Serial0/1
clockrate 2000000
bridge-group 1
!
bridge 1 protocol ieee
hostname r5
!
interface ethernet 0
ip address 10.1.1.5 255.255.255.0
> ----------
> From: Pickell, Aaryn[SMTP:Aaryn.Pickell@getronics.com]
> Reply To: Pickell, Aaryn
> Sent: Dienstag, 12. Juni 2001 16:59
> To: 'Juan Alcaide'; Khalid Nafie
> Cc: Ccielab (E-mail)
> Subject: RE: transparent bridging
>
> You can EVEN do tb between ethernet and token ring, with certain caveats.
>
> And that's different than translational bridging.
>
> Aaryn Pickell - CCNP ATM, CCDP, MCSE
> Senior Engineer - Routing Protocols
> Getronics Inc.
> Direct: 713-394-1609
> Email:aaryn.pickell@getronics.com
>
> This e-mail message and any attachments are confidential and may be
> privileged. If you are not the intended recipient, please notify me
> immediately by replying to this message and please destroy all copies of
> this message and attachments. Thank you.
>
>
> > -----Original Message-----
> > From: Juan Alcaide [mailto:jalcaide@cisco.com]
> > Sent: Tuesday, June 12, 2001 6:47 AM
> > To: Khalid Nafie
> > Cc: Ccielab (E-mail)
> > Subject: Re: transparent bridging
> >
> >
> > There is no reason why you cannot do it. TB also over FR, ATM, etc...
> >
> >
> > -----------------------------------------------------------
> > Juan Alcaide
> > Network Consulting Eng. Cisco Systems.
> > Tel/Fax:1+ (919) 392 7221 Pager 1+800 365 4578
> > -----------------------------------------------------------
> >
> > On Mon, 11 Jun 2001, Khalid Nafie wrote:
> >
> > > hi guys,
> > > I was thinkking all the time that the TB is only for
> > eathernet, but
> > > when i went through the documenation CD i found that cisco
> > is using it for
> > > both ehternet and tokenring!!!!
> > > any comment?
> > > **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
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