From: Brian Lodwick (xpranax@xxxxxxxxxxx)
Date: Tue Mar 05 2002 - 13:44:40 GMT-3
You can do SR/TLB with Layer 3 protocols I've successfully setup a router as
a SR/TLB bridge with a token-ring and ethernet router on each side and
pinged from one to the other. That is what the command bridge 1
bitswap-layer3 address is for.
Key commands that are often forgotten.
on the 3920:
set all TRCRFs MTU to 1500
on the Token-Ring router:
on the token interface multiring all (or instead of all use whatever
protocol you need)
And ofcourse on the bridge you have to have the:
bridge 1 bitswap-layer3 address
>>>Brian
>From: "Brian McGahan" <brian@cyscoexpert.com>
>Reply-To: "Brian McGahan" <brian@cyscoexpert.com>
>To: "Chua, Parry" <Parry.Chua@compaq.com>, "Anand Ghody"
><vze2hq65@verizon.net>, <ccielab@groupstudy.com>
>Subject: Re: translational bridging driving be nuts!!!
>Date: Tue, 5 Mar 2002 10:15:46 -0600
>
>Anand,
>
>This is a common issue that causes people to tear their hair out. SR/TLB
>can only be done with non-routable protocols. This document explains why.
>http://www.cisco.com/warp/customer/701/4.html
>
>"Remember that Ethernet and Token Ring bridging is only possible with
>non-routable protocols. Here's why:
>Sometimes MAC addresses are carried in the data portion of a frame. For
>instance, Address Resolution Protocol (ARP) places the hardware address in
>the data portion of the the link-layer frame. It is simple to convert
>source
>and destination addresses in the header, but conversion of hardware
>addresses that may appear in the data portion is more difficult. When
>performing source route transparent or source route translational bridging
>between Ethernet and Token Ring, Cisco does not search for instances of
>hardware addresses in the data portion. So, only non-routable protocols
>work
>with Ethernet and Token Ring bridging."
>
>HTH
>
>Brian McGahan
>CCIE #8593
>brian@cyscoexpert.com
>
>CyscoExpert Corporation
>Internetwork Consulting & Training
>http://www.cyscoexpert.com
>Voice: 847.674.3392
>Fax: 847.674.2625
>
>----- Original Message -----
>From: "Chua, Parry" <Parry.Chua@compaq.com>
>To: "Anand Ghody" <vze2hq65@verizon.net>; <ccielab@groupstudy.com>
>Sent: Tuesday, March 05, 2002 3:59 AM
>Subject: RE: translational bridging driving be nuts!!!
>
>
> > How it is going ?
> >
> > It is not clear about the setup on Cat3920 between R1 and R4, You
>mention
>it is SRT on
> > 3920. If SRT, then you may want to try to set it to SRB and you are
>doing
>SRBTLB.
> >
> > Next, it R1 and R4 connect to the same ring or just in a extended vlan
>(ring-bridge-ring)?
> >
> > You can debug at R4 when do testing to see what packet has send across..
> > Parry Chua
> >
> > -----Original Message-----
> > From: Anand Ghody [mailto:vze2hq65@verizon.net]
> > Sent: Monday, March 04, 2002 1:18 AM
> > To: ccielab@groupstudy.com
> > Subject: translational bridging driving be nuts!!!
> >
> >
> > Alright, I have no idea why this is not working and need help. I
> > checked previous posts and made some adjustments but it still does not
> > work Need help!!!
> >
> > heres the setup
> >
> > r3 (e0, 172.16.3.2) -> catalyst 5505 port 2/2 -> catalyst 5505 port 2/1
>->
> > r4 (e0) -> r4 (to0) -> cat 3900 port 1 ->cat 3900 port 6 -> r1 (to0,
> > 172.16.3.1)
> >
> >
> > I have disable ip routing on r4 and also setup bridge 1 bitswap-layer3
> > address
> >
> > the ports on the cataylst 5500 are on the same vlan
> > the port on the cataylst 3900 are also in the same vlan and setup for
>srt
> >
> > If I but an ip address on r4 token ring I can ping it from r1
> >
> > I'll past the configs to make it easier
> >
> >
> > r3 config
> > !
> > interface Ethernet0
> > ip address 172.16.3.2 255.255.255.0
> >
> > |
> > connnects to catalyst 5500
> > |
> >
> > r4 config
> > no ip routing
> > no ip finger
> > !
> > !
> > source-bridge ring-group 100
> > source-bridge transparent 100 3 2 1
> > !
> > !
> > interface Ethernet0
> > no ip address
> > no ip route-cache
> > bridge-group 1
> > !
> > interface Serial0
> > no ip address
> > no ip route-cache
> > shutdown
> > !
> > interface Serial1
> > no ip address
> > no ip route-cache
> > shutdown
> > !
> > interface TokenRing0
> > no ip address
> > no ip route-cache
> > ring-speed 16
> > source-bridge 1 2 100
> > !
> > ip classless
> > no ip http server
> > !
> > bridge 1 protocol ieee
> > bridge 1 bitswap-layer3-addresses
> > !
> >
> > |
> > connects to catalyst 3900
> > |
> >
> > r1 config
> > !
> > interface TokenRing0
> > ip address 172.16.3.1 255.255.255.0
> > ring-speed 16
> >
> >
> >
> >
> > .
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