RE: min number of preambles and idles as 10G mac receive

["Grow, Bob" <bob.grow@xxxxxxxxx>]

Title: min number of preambles and idles as 10G mac receive

D3.0 clause 46.2.1 specifies the minimum receive IPG at the XGMII as five.  This minimum is the Terminate for the previous frame, a column of Idles and then the Start control character of the current frame.  The RS does not change this length in presenting data to the MAC.  46.3.3 specifies that preamble length may vary.  Because of Start and SFD alignment requirements, the minimum preamble that MAC needs to handle at 10 Gb/s is three (at the XGMII, the sequence Start, preamble, preamble, SFD).

 

An implementer may want to take advantage of the difference between minimum and average, and perhaps optimize to the conforming minimum average interframe spacing rather than isolated IPG and preamble.

 

--Bob Grow

 

 

-----Original Message-----
From: Tosaku Nakanishi [mailto:tosaku@xxxxxxxxxxxxxxxxxxx]
Sent: Monday, April 09, 2001 9:37 AM
To: 'stds-802-3-hssg@xxxxxxxx'
Subject: min number of preambles and idles as 10G mac receive

Hello,

Is there any specification to determine min number of preambles as 10G mac receiver? Also any specification to determine min number of idles between incoming frames as 10G mac receiver?

Best Regards,

Tosaku Nakanishi
Silicon-Packets Inc.
408 382 6684