| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
I'm trying to create a table of MAC parameters specified through SMT.
I would like confirmation of the values that are already input, and any
contributions to the blank spots would be appreciated.
MAC Parameters Specified Through SMT.
ITEM DESCRIPTION BASE DEFAULT VALUE
1 Individual_MAC_address(16bit) O xxxxxx
2 Individual_MAC_address(48bit) O xxxxxx
3 group_MAC_address O xxxxxx
4 T_Min_value M <4.0ms
5 T_Max_value M >165ms
6 TVX_value M 2.35ms
7 T_Req_value M >T_Min <T_Max
8 T_Neg_value M 8ms
9 T_Pri_value M ??
10 Indicate_for_own_frame M ??
11 Indicate_for_rcv_only_good_frame M ??
Thanks
Phil.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1355.1 | KONING::KONING | Paul Koning, B-16504 | Wed Jun 01 1994 17:45 | 36 | |
I'm trying to figure out what you used to create that list, or what you
would do with it afterwards. The format looks a bit like a PICS, but
it doesn't look like a valid or meaningful PICS.
Anyway, the answers are:
1 Individual_MAC_address(16bit) O NOT SUPPORTED
2 Individual_MAC_address(48bit) O from address ROM
3 group_MAC_address O supplied by application
4 T_Min_value M fixed 4 ms
5 T_Max_value M fixed 167.77224 ms
6 TVX_value M set by mgmt, def=2.62 ms
7 T_Req_value M set by mgmt, def=8 ms
8 T_Neg_value M computed by MAC
9 T_Pri_value M NOT SUPPORTED
NOTE: that can't be "M"; it's clearly labelled in the standard as optional.
10 Indicate_for_own_frame M huh?
11 Indicate_for_rcv_only_good_frame M huh?
Re the last two: normal drivers only deliver good frames, and not own frames.
The MAC chip can be put into a mode where it does receive own frames, but this
is for loopback testing only. The hardware delivers bad frames along with
good ones; it's the driver that discards the bad ones (and counts them).
paul
| |||||
| 1355.2 | CAATS::VINES | Thu Jun 02 1994 14:37 | 8 | ||
Thanks for the info Paul.
Actually, the data in note .0 originated from a third party voice
switch that will reside on the LAN. I want to make some comparatives
between DEC's and its SMT parameters to see if there are any
differences, between them.
Phil
| |||||
| 1355.3 | KONING::KONING | Paul Koning, B-16504 | Thu Jun 02 1994 17:23 | 4 | |
I'm still puzzled. If you find differences, what conclusions would you draw from them? paul | |||||