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From: Manish Agrawal [mailto:agrawal.manish@xxxxxxxxx]
Sent: Sunday, July 22, 2001 11:56 PM
To: Grow Bob; 'Alon Lamensdorf'; stds-802-3-hssg@xxxxxxxx
Subject: RE: [802.3ae] 10 Gig XGMIIHello Bob,If we loopback TXCLK to RXCLK, some gate appears in the receiver clock path. Then it becomes difficult to met setup and hold time. Also its not a wise decision to use the gated clock. Don't we have any other solution of it?Can't we use the same RXCLK (not TXCLK loopbacked) and double synchronize all the loopbacked data with the RXCLK?Best Regards,Manish-----Original Message-----
From: owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx [mailto:owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx]On Behalf Of Grow, Bob
Sent: Friday, July 20, 2001 3:10 AM
To: 'Alon Lamensdorf'; 'stds-802-3-hssg@xxxxxxxx'
Subject: RE: [802.3ae] 10 Gig XGMIIIf the implementation is to the current spec, the TX side can logically be connected to the RX side and data should be looped back. If your purpose is to validate the XGMII implementation, it won't do a very good job (no testing of the link fault state machine, error handling, etc.)The connection is straight forward: TXD<0> to RXD<0> ..., TXC<0> to RXC<0>..., and TXCLK to RXCLK.Obviously, you will need to assure that when you loop the signals back that setup and hold times are met.Bob Grow-----Original Message-----
From: Alon Lamensdorf [mailto:ALamensd@xxxxxxxxx]
Sent: Thursday, July 19, 2001 5:30 AM
Subject: [802.3ae] 10 Gig XGMII
I am working with a 10 Gig Net Processor that got an XGMII interface.
I would like to know if I can connect the RX port to the TX port in the XGMII interface ( to perform a loop).
In case the answer is yes, can u advise me about the proper way to do it?
R&D hardware engineer