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Re: [EFM] OAM loop back / echo server function


Would a MAC Control frame with a specific opcode  be usable as an L2 
ping.  This would take the frame all the way to the MAC control layer, 
through all of the PHY and RS.

There could also be a command within the OAM functionality that would 
generate a special MAC Control frame that would have an opcode that would 
specify a test pattern in the "parameters" field of the frame.  This could 
potentially provide a very valuable remote trouble shooting tool for 
service providers.

Roy Bynum

At 03:02 PM 9/4/01 -0700, Geoff Thompson wrote:

>I don't think this is a stupid question.
>I don't think we need an IP level PING
>A L2 ping would do, perhaps even better, the demarc would look for PING 
>type and then just swap SA & DA.
>My expectation is that the demarcation device will need a MAC address
>My expectation is that the demarcation device will probably end up with an 
>IP address in order to support:
>         SNMP for OA&M
>         Firewall services for the subscriber
>(That issue is, of course, beyond our scope)
>At 03:47 PM 9/4/01 -0400, Fletcher E Kittredge wrote:
>>On Fri, 31 Aug 2001 14:11:54 -0700  "Geoff Thompson" wrote:
>> > As I have said before, I do believe that we will need a demarcation device
>> > that has the capability to host OA&M functions.
>> > We have talked about "loop back" from this point in the network.
>> > Let us forevermore make that "PING"
>>         Apologies if this is a stupid question, but does PING in this
>>context mean the utility that sends an IP ICMP ECHO REQUEST packet and
>>listens for an ECHO REPLY packet?  If so, am I correct in thinking this
>>means the demarcation device would require an IP address?