Subject: [ifmib] RFC 2233 : ifStackTable related clarifications

From: [email-masked]
Date: Wed, 25 Jul 2001 15:05:33 +0800

Hi,

Background :
Currently, i am exploring for RFC 2233 support to one
of the device which acts as transperent bridge.  It
has two ethernet interface and 1 WAN interface.
So, it can bridge between LAN and LAN or LAN and WAN.

Find below the stacking structure I am currently
thinking of:

                    IP interface
            ------------------------
            |   Virtual-IP interface |
            -------------------------
                     |
  ------------------------------------------
  |           BRIDGE Forwarding MODULE     |      
  ------------------------------------------
      |	         |                 |
    ------    -------          ----------  
    MAC-P0    MAC-P1            MAC-P2
    ------    -------          ----------
     Eth       Eth	         AAL5
                               ----------
                                 ATM
                               ----------
                                ADSL FAst
                               ----------
                                ADSL phy

Here Virtual-IP(ifType=propVirtual(53)),
BridgeFwModule
(ifType=frForward(158)), Mac-P0(ethernetCsmacd=6) to 
Mac-p2(ifType=ethernetCsmacd=6), AAL5(ifType=aal5),
ATM(ifType=atm),ADSL fast( ifType=fast)
and ADSL physical(ifType=adsl) the sub-layers to IP
interface.  Each of the statistics required by RFC
2233 will be maintained by each of these interfaces.

Here are my questions:

a. Is my proposed sub-layering and stacking for
transperent bridge in accordance with RFC 2233?
Let me know if it requires any changes.

b. Are the ifTypes assigned to each of bridge ports,
bridge forwarding module and virtual-ip interface OK?

It would be great,if you could point me to some links
on the web which give stacking examples.

Thanks in advance. 

Regards,
Umesh

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