From: John Neiberger (neiby@xxxxxxxxxx)
Date: Sat Nov 24 2001 - 20:36:20 GMT-3
I was finally able to make this work using RSRB with direct encapsulation,
but this was definitely a learning experience. I had to make changes to R1,
R2, and R3. R4 still remains blissfully unaware of anything. It simply has
an IP address assigned to its ethernet interface.
The network looks like this:
R1----(t/r)-----R2-----(hdlc)------R3----(eth)-----R4
I was able to transparently bridge traffic from R1 to R4 by adding the
command "bridge xyz bitswap-layer3-addresses" to R2. Pretty simple config.
Then I tried to do this with SR/TLB. I wasn't able to make it work using
SR/TLB on R2 and I think I know why. I'll have to go back and try again.
I was able to make this work by setting up RSRB-direct between R2 and R3 and
then configuring SR/TLB on R3. I also had to add multiring IP to the token
ring interfcaes on R1 and R2, and then source-bridge spanning to R2. Here
are the configs:
R1:
interface TokenRing0
ip address 172.16.1.1 255.255.255.0
ring-speed 16
multiring ip
R2:
no ip routing
!
source-bridge ring-group 200
source-bridge remote-peer 200 interface Serial0
!
interface Serial0
no ip address
no ip route-cache
no ip mroute-cache
no fair-queue
clockrate 64000
!
!
interface TokenRing0
no ip address
no ip route-cache
no ip mroute-cache
ring-speed 16
multiring ip
source-bridge 10 1 200
source-bridge spanning
!
R3:
no ip routing
!
!
!
source-bridge ring-group 200
source-bridge remote-peer 200 interface Serial0
source-bridge transparent 200 20 1 1
!
interface Ethernet0
no ip address
no ip route-cache
no ip mroute-cache
bridge-group 1
!
interface Serial0
no ip address
no ip route-cache
no ip mroute-cache
no fair-queue
!
bridge 1 protocol ieee
bridge 1 bitswap-layer3-addresses
Interestingly, that last command is necessary. I thought SR/TLB would
handle that but this is still apparently necessary to handle ARP requests.
Regards,
John
On Sat, 24 Nov 2001 14:48:31 -0800 (PST), John Neiberger wrote:
| Okay, I tried that and it still does not work. I thought about your
| suggestion and I think I know where you're going with it. Are you
thinking
| that the addition of that command would cause the bits to be swapped
twice?
|
|
| I've been playing some more with the SR/TLB config and I haven't been
able
| to make it work yet. I've added multiring IP to both token ring
interfaces
| and that didn't seem to help.
|
| My next thought is to configure RSRB with direct encapsulation (since I
have
| ip routing turned off and no ip addresses on R2 or R3.) Then I could put
| the SR/TLB config on R3 instead of R2 and see if that makes a difference.
|
| It still seems to me that I'm close to making this existing config work,
but
| the solution eludes me.
|
| Thanks,
| John
|
| On Sat, 24 Nov 2001 13:45:26 -0500, Nigel Taylor wrote:
|
| | John,
| | Remove the configuration line "bridge 20
| bitswap-layer3-addresses"
| | and then try it...
| | What happens? Does it work? If so can, you explain why? Want to
know..
| !
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