| 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 |
synopsis:
does anyone have information on how to change the
token rotation value on the DECbridge 900?
description:
- customer is trying to force another device to
intiate the ring by raising the token rotation value on
the DECbridge 900
- this isn't for application in a production environment
- they've applied this technique to DECbridge 620's
Thank you,
Vincent Romano
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1544.1 | DECswitch 900 EE/EF | CGOU14::DMARLOWE | Have you been HUBbed lately? | Thu Dec 29 1994 21:51 | 5 |
Use HUBWATCH.
What value is there in getting a specific device to initiate the ring?
dave
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| 1544.2 | A small digression & comment..... | NETCAD::BATTERSBY | Fri Dec 30 1994 09:32 | 13 | |
I've noticed an increasing number of notes mentioning the DECswitch
900EE and FDDI in the same context. Like Norm Abrams says on his
PBS carpentry program, "let me reassure you", there is no FDDI
circuitry inside the DECswitch 900EE. :-) There is only circuitry
to make FDDI connections in the DECswitch 900EF and PEswitch 900TX.
The DECswitch 900EE is an *Ethernet only* switch (2 AUI, & 4 UTP).
There was also a note somewhere in here where someone is using a pair
of DECswitch 900EE's connected between then with UTP to fiber mau's
DELFM's. Keep in mind that this fiber link will only run at the wire
speed of the interface of the 10baseT UTP ports IE: 10mhz that the
MAUs are connecting.
Bob
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| 1544.3 | thanks for replies | CSC32::ROMANO | Wed Jan 04 1995 16:53 | 26 | |
thanks for responses to this query
re - .1 : Oh well, HUBWATCH is not available at the user site.
Site (a bank) has all FDDI user systems on NI cards.
They replaced a 620 with the 900MX, and it appears their
response was better with the 620 at 12ms than the 900MX
at its default 8ms.
The ring performed better with the 620 at 12ms than when
the 620 was running at 8ms (they manipulated the token
rotation value with MCC). They'd like to try the 12ms
value on the 900MX.
re - .2 : Bob,
yes, the device is a DECbridge 900MX, not an 'EE', your addt'l
comments on the UTP connected 900EEs are welcomed
Thank you,
V. Romano
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| 1544.4 | From the HUB_MGMT conf. | NETCAD::GALLAGHER | Thu Jan 05 1995 15:29 | 16 | |
<<< NETCAD::KALI$USER3:[NOTES$LIBRARY]HUB_MGNT.NOTE;1 >>>
-< DEChub/HUBwatch/PROBEwatch CONFERENCE >-
================================================================================
Note 1842.1 900MX token rotation value 1 of 1
NETCAD::SLAWRENCE 9 lines 5-JAN-1995 12:29:59.80
-< To set the T_Req >-
--------------------------------------------------------------------------------
SNMP Set fddimibPATHMaxTReq[1.1] (1.3.6.1.2.1.10.15.73.4.2.1.5.1.1)
To 12000000
That object is defined in rfc1512.mib, FDDI-SMT73-MIB - the FDDI MIB.
Note that this will change the value _bid_ by the switch - the value
used by the ring will be the lowest bid by any station.
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