Re: Fallback Bridging

From: joe_astorino@comcast.net
Date: Fri Feb 20 2009 - 02:50:53 ARST

OK lets try with an example. Lets say you have a catalyst switch. Ports 1-5 have hosts on them that are running some insane legacy protocol that is not IP like say DECNET. Ports 6-10 have hosts running Appletalk or some such thing. Ports 1-5 are in VLAN 10 and ports 6-10 are in VLAN 20. You want all the hosts to be able to communicate. You can bridge VLAN 10 and VLAN 20. The switch can't route DECNET and appletalk between VLANs (or at all I don't think) but it can bridge them.
----- Original Message -----
From: "Raghav Bhargava" <raghavbhargava12@gmail.com>
To: "joe astorino" <joe_astorino@comcast.net>
Cc: "Cisco certification" <ccielab@groupstudy.com>
Sent: Thursday, February 19, 2009 11:45:14 PM GMT -05:00 US/Canada Eastern
Subject: Re: Fallback Bridging

well yes joe..that definitly helps..but can you provide a little more
explanation..I hope you don mind..

raghav

On Thu, Feb 19, 2009 at 8:44 PM, <joe_astorino@comcast.net> wrote:
> Raghav,
>
> The way I understand it is this -- VLANs in general, and thus inter-vlan
> routing on a switch were designed around the IP protocol. Fallback bridging
> basically allows you to bridge non-ip protocols between VLANs. Since it is
> not IP it cannot be routed normally like an IP packet between vlans, so it
> can be bridged. I hope that helps
>
> - Joe
> ----- Original Message -----
> From: "Raghav Bhargava" <raghavbhargava12@gmail.com>
> To: "Cisco certification" <ccielab@groupstudy.com>
> Sent: Thursday, February 19, 2009 11:27:03 PM GMT -05:00 US/Canada Eastern
> Subject: Fallback Bridging
>
> Hi Experts,
>
> I was reading Fallback Bridging but somehow could not understand it.
> Can someone please explain in simple terms.
>
> Appreciate all the help..
>
> --
> Warm Regards
> Raghav
>
>
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-- 
Warm Regards 
Raghav 

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