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Date: Mon, 27 Sep 2004 01:45:44 -0500 (EST)
To: isis-support@imagestream.com
Subject: Enterprise Linux Version 4.2.2 for routers available

Version 4.2.2 of ImageStream's Enterprise Linux is now available as a general
availability (GA) release for all ImageStream router customers.

This software release is provided at no charge to all ImageStream customers.
Version 4.2.2 is a maintenance release and recommended for all customers who
wish to run the latest GA release.

This release note documents commands and features added between Version 4.2.1
and Version 4.2.2.


----------------------------


New Features in Version 4.2.2


PPP over Ethernet (PPPoE) Server Support for Ethernet Devices Added

Version 4.2.2 adds new commands to support PPPoE sessions on Ethernet devices.
Previous versions supported PPPoE only on ATM interfaces.  Users can
authenticate DSL or other PPPoE users against a RADIUS server and assign IP
addresses from the RADIUS server or from a local pool defined on the router.
Example PPPoE configurations are available in the Technical Notes section of the
ImageStream Support Web site.


PPP over Ethernet (PPPoE) Client Support for Ethernet Devices Added

Version 4.2.2 adds new commands to support PPPoE sessions for CPE and other
client devices that connect to a service using PPPoE authentication, such as DSL
or cable broadband.  An example client PPPoE configuration is available in the
Technical Notes section of the ImageStream Support Web site.


Route Cache Settings Updated

The settings for route cache expiration in Version 4.2.2 have been altered.
Version 4.2.2 uses more aggressive cache settings and will expire route table
entries more quickly to help minimize the effects of portscannning and other
denial of service (DoS) activity.



The following bugs have been fixed in Version 4.2.2:


Use of Source NAT Causes Destination Routing Cache Overflow

For higher traffic networks, Version 4.2.1 contained a bug that would cause the
destination routing cache to overflow and drop traffic.  In this situation, the
router will log a "dst cache overflow" message to the debug log.  This issue
only occurs when source NAT rules are used and traffic reaches a particular
threshhold.  Version 4.2.2 corrects the error in freeing routing cache entries
when source NAT is enabled.

Router Time Setting Script Does Not Prompt For Offset

Version 4.2.0 and 4.2.1 include a script that prompts users for information
about the router's time and time zone settings.  In these versions, the router
does not adequately explain the format of the timezone.  Version 4.2.2 adds a
second and third question to the script to specifically prompt users for the
number of hours offset and relationship to UTC.