RE: [EFM] RE: OAM Transport Proposal
Hi Brad,
For instance, what is the management/service interface defined in
1000Base-X when PCS/Auto-Negotiation part of PHY is not
implemented in PHY but is with MAC. What is the management/service
interface defined for RF/LF sequence terminating in RS?
Is it broken within the context of Ethernet?
Thanks,
Sanjeev
At 02:11 AM 05/01/2002 -0700, Booth, Bradley wrote:
>
>Rich,
>
>This is the sticking point. 802.3 specifies service interfaces and a PHY
>management interface. To assume that EFM is going to do any management of
>the link without using either of these interfaces implies that the OAM must
>be handled inside the PHY. If OAMinP is not handling its OAM messages
>either in the PHY or via a service interface or PHY management interface,
>then I think this is "broken" within the context of Ethernet.
>
>Cheers,
>Brad
>
>-----Original Message-----
>From: Rich Taborek [mailto:rtaborek@xxxxxxxxxxxxx]
>Sent: Tuesday, April 30, 2002 10:29 PM
>Cc: 'stds-802-3-efm@ieee.org'
>Subject: Re: [EFM] RE: OAM Transport Proposal
>
>
>
>Brad,
>
>The simple Fault and Alarm conditions that are expeditiously transported
>via OAMinP should not utilize the relatively slow MDIO/MDC mechanisms.
>The management entity for OAMinP is not significantly different than
>that which carriers are used to for SONET OAM for handling the same
>conditions. I believe that the specific management interface is out of
>IEEE P802.3ah scope.
>
>Best Regards,
>Rich
>
>--
>
>"Booth, Bradley" wrote:
>>
>> Matt,
>>
>> A management frame I described is that defined in Clause 22 as a MDIO/MDC
>> communication. If the preamble is filtered by the PHY, then there has to
>be
>> some way to pass this preamble OAM information to the management entity.
>In
>> 802.3, this is done via MDIO/MDC (or management frames). A management
>frame
>> takes over 25 us to be passed across the MDIO/MDC interface. Unless the
>> intention is to have the PHY handle all OAM in preamble without management
>> entity intervention, then the response to the OAM in preamble will be
>> hampered by the MDIO/MDC interface.
>>
>> Cheers,
>> Brad
>