[nsp] Ethernet/G.703 converter & Cisco G.703 interface

[Bruce Pinsky]

sthaug at nethelp.no wrote:
>>This could be the Cisco-HDLC header.  Or something else prepended by 
>>the "Cisco half-bridge" to the packets.
> 
> 
> It looks like Cisco HDLC. From
> 
> 	http://www.nethelp.no/net/cisco-hdlc.txt
> 
> | The first ("address") octet is set to 0x0F for unicast packets and 0x8F
> | for broadcast packets. Broadcast just means that the higher-level protocol
> | thought this was a broadcast packet; cisco doesn't support multidrop
> | HDLC at this time.
> | 
> | The second ("control") octet is always 0.
> | 
> | The next two octets are a 16-bit protocol code, sent most-significant-first.
> | These codes are usually Ethernet type codes. cisco has added some codes to
> | support packet types that don't appear on Ethernets. The current list of codes
> | is as follows:
> ...
> | TYPE_BRIDGE             0x6558  Bridged Ethernet/802.3 packet
> 

So, as you have pointed out, it becomes a question of what does the 
converter expect/support.  Will it, for example, be happy if this was a PPP 
connection with bridging configured.  If so, his setup *might* work.

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bep