========================================================================
Nortel Networks, Inc                                 Updated: 04/24/2001
MLS Centillion 100 / 5000BH                                             
SpeedView Version 5.1.2.0       
README file version 1.0                               
========================================================================

===================
1. RELEASE SUMMARY:
===================

This is a maintenance release. 

==================================
2. IMPORTANT NOTES BEFORE UPGRADE:
==================================
None.

=======================
3. PLATFORMS SUPPORTED:
=======================

Win95/Win98/WinNT


=====================
4. NOTES FOR UPGRADE:
=====================

See release notes for release v5.1.1.0


================================ 
5. VERSION OF PREVIOUS RELEASES:
================================

Version 5.1.1.0


=================
6. COMPATIBILITY:
=================

Manages C100/5000BH versions - 5.1.x

===========================
7. Changes in This Release: 
===========================

*******************************
* NEW FEATURES IN THIS RELEASE:
*******************************

CR147741:	1483 Vports
	   Add support for 64 1483 vports. Up to 64 1483 Vports may now be
	   configured.

CR147742:	1483 Vports
	   Implement Turbo 1483 vports.  Turbo 1483 vports are now supported.
	   When configuring a turbo 1483 vport, only ethernet vlans which do
	   not have any other vport members will be available.

CR148293:   Bulk Configuration
	   Add Port Speed and Connection Mode to Ethernet Bulk Configuration Option.
	   Port speed and Connection mode are now configurable via the Bulk 
	   Configuration option for the following Ethernet cards:  5625, 5625HD, 
	   EtherSpeed II.

CR148295:	MPOA
	   Add MPOA Client Enable Checkbox.  The MPOA client may now be
	   disabled.  Disabling the MPOA client prevents the advertisement
	   of MPOA client addresses in a PNNI environment.  The default
	   behavior is MPOA Client Enabled.


***************************************
* OLD FEATURES REMOVED IN THIS RELEASE:
***************************************

None.


************************************
* PROBLEMS RESOLVED IN THIS RELEASE:
************************************

CR144209:  ATM/Turbo Mode Circuits
           Prevent user from configuring a VPI/VCI which is in the conflicting
           range with previously configured reserved turbo circuits.

           Whenever a turbo-mode vport is created, the switch will use the 
           next 5 consecutive VCI numbers for use to establish a separate 
           unique circuit between each card in the local switch so that frames
           can be segmented into cells at each card in the source switch rather
           than all frames having to go to the mcp card to be segmented.

           For example, if you configure a turbo mode circuit using VPI1/VCI32 
           then although it's not apparent by looking at the configuration, the 
           switch will reserve VPI1/VCI32, VPI1/VCI33, VPI1/VCI34, VPI1/VCI35, 	
           VPI1/VCI36, and VPI1/VCI37 for use by this vport.

           The user will no longer be allowed to configure a turbo mode circuit
           which would create a conflict with an existing circuit, nor configure
           any type of circuit which would conflict with the reserved range of an
           existing turbo mode circuit.


CR144596:  Configuration File Conversion
           Corrupted configuration file with conversion tool from Speedview 5.1.1.

CR146432:  ATM
           Prevent user from configuring more than 16 unique non-zero VPI numbers
           box-wide per card/port.

CR147743:  ATM/Turbo Mode 1483 VPORTS, Vlans
           When configuring a 1483 turbo vport, only ethernet vlans which do not have
           any other vport members will be available. 

CR148012:  SNMP
           OID error downloading a port configured in a vlan belonging to a non-sequential
           STP group ID.


================================
8. Changes in Previous Releases: 
================================

**************************************
* FEATURES ADDED IN PREVIOUS RELEASES:
**************************************

None.


********************************************
* OLD FEATURES REMOVED IN PREVIOUS RELEASES:
********************************************

None.

*****************************************
* PROBLEMS RESOLVED IN PREVIOUS RELEASES:
*****************************************

None.

=====================
9. KNOWN LIMITATIONS: 
=====================


CR 143951: Port Config
	   When more then 10 vlans exist, VLANs in the drop down list on the
	   port config dialogs appear to be sorted incorrectly.  This is a 
	   function of MS Windows.  A work around exists: Rename VLAN1 through
	   VLAN9 to VLAN01 through VLAN09.
	   
CR 144225: SNMP/Save Config to Flash
       Occasionally, the following error has been encountered: 
       "The request to commit the changes failed! (rc=0xFFFFFFDF)" This error
       particularly can happen on a switch with Redundant MCPs, and a complex
       configuration (large number of Lecs, LES/BUS, and LECS, for example).  
       The error is due to the save operation taking longer then the SNMP
       Connection Timeout setting in SpeedView.  To correct this, go to 
       Option/Preferences and increase the Connection Timeout parameter.



For other known issues, please refer to version 5.1.1.0 release note from the 
Nortel Network web site at www12.nortelnetworks.com.


(c) 2000-2001 Nortel Networks Incorporated.  All rights reserved.



