[nsp] C7200, 12.1, route-bridge ipv4, bridge ipv6?

[Gert Doering]

Hi,

On Mon, Sep 16, 2002 at 10:00:17PM +0200, Gert Doering wrote:
> Yes, thanks for reminding me.  I'm not going for 12.2(*)T yet, though -
> while I would like to see IPv6 route-bridge, it's not in there yet (and I
> have developed a certain dislike of "T" images on production machines).

... which brought up an interesting question today.

Will IOS (12.1 code base) handle bridging IPv6 while routing IPv4?


The scenario I have been thinking of is something like this:

CPE with v4+v6 -> Ethernet/DSL-Modem, doing bridged-PDU ATM
	       -> 7206 with 12.1(16)
	       
For IPv4, the 7206 is configured to do IRB...:

bridge irb
...
interface BVI1
 description Bridge-Virtual for ATM2/0.117
 mtu 1500
 ip address 195.30.70.41 255.255.255.252
...
interface ATM2/0.117 point-to-point
 description ADSL line with ethernet bridge to customer network
 pvc gd1-797 15/117 
  ubr 1920
  oam-pvc manage
  encapsulation aal5snap
 !
 bridge-group 1
 bridge-group 1 spanning-disabled
...
bridge 1 protocol ieee
bridge 1 route ip


Now I want to enable IPv6 on that customer line as well.  The 7206 cannot
do it, but might it work to add an Ethernet port to "bridge-group 1",
and connect that to a 12.2T box with IPv6 on it?


So the packets would travel like this:

IPv4 -> Eth/ATM bridge -> 7206 -> int BVI 1 -> routed
IPv6 -> Eth/ATM bridge -> 7206 -> bridged to "ethernet4/0" -> IPv6 router

I intend to do this anyway :-) - I just wonder how "bridge irb" will
affect this - the "bridge 1 route ip" thing might do the wrong thing
here...

gert

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Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de