[nsp] Bridging?

[Vincent De Keyzer]

(trying once again to get this working)

I am not sure I was clear enough on the first shot.

My idea is the following:
1. I currently have Cisco 2621 access routers, with E1 controllers and n
x "CSU/DSU + Cisco 1600" at the other end as CPEs. On the ethernet port
of the 1600 the customer typically hooks up his firewall (ISP
environment).
2. I would like to replace "CSU/DSU + router" by "E1/Eth bridge" to
which the customer would connect his FW.

So far, all the schemes I have seen are putting the ethernet side of the
2621 (or 3640 in my previous example) into some sort of bridge or bridge
group; IMHO this interface should not be modified: it's only the Serial
links that would change.

So instead of a router that routes between 
Fa0/0 and Serial0/0:0, Serial0/1:0, Serial1/0:0, etc.
I would have a router that routes between
Fa0/0 and BVI0, BVI1, BVI2, etc. (or something like that).

The "BVI" interfaces having the IP address that was previously on the
Ethernet interface of the CPE (/30 for PtP connection disappears).

Is this making sense? Is this possible?

Any help will be appreciated

Thanks

Vincent
 

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of David Curran
> Sent: jeudi 26 février 2004 17:06
> To: cisco-nsp at puck.nether.net
> Subject: RE: [nsp] Bridging?
> 
> 
> If you're doing nothing but bridging (i.e. no routing) you 
> can do the following
> 
> bridge 1 protocol ieee
> bridge 1 irb
> 
> int e0/0
>  bridge 1
> 
> int s0/0:0
>  bridge 1
> 
> If you need to route some other protocol, you'll need to add
> 
> bridge 1 route <protocol>
> !
> interface bvi 1
>  <protocol options>
> !
> 
> It should work just fine.  Look at this link:
> 
> http://tinyurl.com/yvhqh
> 
> -david
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of 
> Vincent De Keyzer
> Sent: Thursday, February 26, 2004 8:37 AM
> To: cisco-nsp at puck.nether.net
> Subject: [nsp] Bridging?
> 
> 
> Hello guys,
> 
> I am trying to do something without even knowing whether it's 
> possible or not (all I have is a vague promise of a sales guy 
> a few months ago :-).
> 
> The set-up is as follows:
>  Cisco 3640 with VWIC-2MFT-E1 <----E1 link---> E1/Eth Bridge 
> <----> Ethernet station
> 
> So what I am trying to do is to turn the E1 interface on the 
> Cisco (or, more exactly, Serial0/0:0)  into an ethernet host 
> on a remote (i.e. beyond the E1
> link) network.
> 
> Possible?
> 
> I see problems already like: what will be the MAC address of 
> serial0/0:0 on the ethernet network? I have seen a 
> "mac-address" command in int. configuration mode; but before 
> jumping in this I thought I would ask the ones who know...
> 
> So:
> 
> 1.	Is what I am trying to do completely irrealistic or not?
> 2.	If no, what commands do I need on the cisco?
> 
> Note: on the bridge I can configure either PPP or HDLC; but 
> none of them could succeed to bring the line protocol up on 
> the cisco side (can produce the debugs if that helps).
> 
> Vincent
> 
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