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Date: Fri, 22 Nov 2002 15:44:15 -0500 (EST)
From: ImageStream Support
Subject: Enterprise Linux 4.1.0-beta3 for routers available

Version 4.1.0-beta3 of ImageStream's Enterprise Linux is now available as an
open beta release for all ImageStream router customers.

This software release is provided at no charge to all ImageStream customers.
Version 4.1.0-beta3 is recommended for all customers who wish to test the new
functionality before the general availability release of Version 4.1.0.


This release note documents commands and features added between Version
4.1.0-beta1 and Version 4.1.0-beta3.


New Features in Version 4.1.0-beta3

Performance Of Intel Chipset Ethernet Cards Dramatically Improved

Version 4.1.0-beta3 adds a new polling mode driver for Ethernet cards equipped
with the Intel EtherExpress Pro chipset.  Most on-board Ethernet NICs and
single-port Ethernet expansion cards for ImageStream routers use the Intel
chipset. This driver replaces the previous interrupt mode.  Due to advanced
buffer and signaling capabilities of the polling mode drivers, Version
4.1.0-beta3 increases Ethernet performance on ImageStream routers and decreases
the CPU footprint, especially under heavy traffic loads.

Failsafe Mode With Rebel Router Boots With Serial Console

Previous versions of Enterprise Linux did not support booting the 1U Rebel
Router into failsafe mode via the serial console.  Version 4.1.0-beta3 no longer
requires the installation of a video card to boot the Rebel Router into failsafe

Support For 4096 Bridge Groups Added

Version 4.1.0-beta3 supports configurations of up to 4096 bridge groups.
Previous versions did not support more than 256 bridges.  Large bridging
configuration (500+ bridges) load times have also been decreased by 75%.

Support for "Ethernet" and "Token Ring" Device Names At Command Line Added

Version 4.1.0-beta3 supports the use of "Ethernet" along with "eth" device
nomenclatures.  At the command line and when using command line utilities such
as iptables, ifconfig or tc, users may now specify either Ethernet or eth when
referring to Ethernet interfaces on the router. "TokenRing" may also be
substituted for "tr" when referring to Token Ring devices.

SAND Version 3.5.16 Included, ISDN BRI Support Added, Statistics Utility Updated

ImageStream's SAND Version 3.5.16 release is included in the Version 4.1.0-beta3
release.  See the release notes for Version 3.5.16 for more information about
the SAND Version 3.5.16 software release.  SAND Version 3.5.16 adds significant
new functionality to the "stats" real-time statistics utility, full support for
ISDN BRI interfaces, and support for VLAN and VRRP commands.

Virtual Router Redundancy Protocol (VRRP) Support Added, IP-Takeover Deprecated

Version 4.1.0-beta3 adds support for the IETF-standard VRRP protocol for
Ethernet failover.  Enterprise Linux uses ImageStream's open source VRRPd
package.  VRRP is interoperable with all other implementations of VRRP.  VRRP
replaces the IP-Takeover package.  Customers using IP-Takeover must switch to
VRRP prior to upgrading to the GA release of 4.1.0.  IP-Takeover will no longer
be available as of Version 4.1.0.

IPSec VPN Configuration Utility Added

A VPN configuration utility for ImageStream routers has been added to Version
4.1.0-beta3.  Customers can use this script to configure IPSec VPNs using a
single point-to-point tunnel.  The VPN configuration utility, available from
IPSec VPN service menu, can automatically configure remote ImageStream routers
for a point-to-point VPN tunnel.  See the Router Installation Manual for
additional details on using this script.

Hardware Health Monitoring For Set-Top R1 Routers Added

Previous Version 4.0 releases and 4.1.0-beta1 did not support hardware health
monitoring on set-top R1 routers.  Version 4.1.0-beta3 adds support for the VIA
chipsets used for hardware monitoring on the R1.  Version 4.1.0-beta3 hardware
health monitoring also provides more human-readable script output.

Bugs fixed in Version 4.1.0-beta3

The following bugs have been fixed in Version 4.1.0-beta3:

Statistics Rollover With 10/100/1000 and Gigabit Ethernet Cards Fixed

Version 4.1.0-beta3 fixes a bug in the real-time statistics display for
10/100/1000 and Gigabit Ethernet cards.  When accumulated traffic reaches 4
billion bytes or packets, the counter will roll over to 0 instead of remaining
at 4 billion.  This change enables the usage percentages to be calculated
correctly, instead of displaying 0% after the packet or byte count reaches 4

Bridging Over VLANs Fixed

Under Version 4.1.0-beta1, VLANs did not operate correctly as members of bridge
groups.  Adding VLANs to a bridge group caused all traffic sent on the VLAN to
be dropped.  Version 4.1.0-beta3 fixes this behavior, allowing VLANs to operate
properly as members of bridge groups.

Firewall Service No Longer Initializes NAT Tables

To avoid problems with connection tracking tables, the default rc.firewall
script in Version 4.1.0-beta3 no longer initializes the NAT table within
iptables.  This avoids loading the connection tracking modules unless NAT rules
are actually defined on the router.  Version 4.0 releases and 4.1.0-beta1
initialized the NAT table and enabled connection tracking unnecessarily.

Duplicate IP Address Warnings In GateD With Frame Relay/ATM Master Interfaces Removed

The GateD package for dynamic routing has been fixed in Version 4.1.0-beta3 to
remove unnecessary warnings about duplicate IP addresses.  Previous versions
reported warnings on routers with frame relay and ATM master interfaces

GateD Correctly Parses Configurations With Frame Relay And ATM Sub-Interfaces

The GateD package for dynamic routing correctly parses configurations using
sub-interfaces in Version 4.1.0-beta3.  Previous versions would incorrectly
truncate the sub-interface name and use only the master interface name when
configuring dynamic routing.  Version 4.1.0-beta3 allows multiple sub-interfaces
to be used in dynamic routing configurations with GateD.

Various Aesthetic Changes To Menu Options

Version 4.1.0-beta3 fixes small typographical errors in all of the router menus,
and adds clearer descriptions of several menu items.