Date: Tue, 3 Sep 2002 17:14:37 -0500 (EST)
From: ImageStream Support
Subject: (SUPPORT) Enterprise Linux 4.1.0-beta1 for routers available
Version 4.1.0-beta1 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-beta1 is recommended for all customers who wish to test the new
functionality before the general availability release of Version 4.1.0.
VERSION 4.0 RELEASES ARE BASED ON THE LINUX 2.4 SERIES KERNELS. LINUX 2.4 USES
iptables AS A PRIMARY TOOL INSTEAD OF ipchains. WHILE ipchains IS PROVIDED FOR
BACKWARDS COMPATIBILITY, ALL CUSTOMERS ARE STRONGLY ENCOURAGED TO USE iptables
WITH VERSION 4.0 RELEASES.
This release note documents commands and features added between Version 4.0.2
and Version 4.1.0-beta1.
New Features in Version 4.1.0-beta1
Kernel Version, Modules Updated
Version 4.1.0-beta1 adds ImageStream's Enterprise Linux based on Linux kernel
version 2.4.19. All kernel modules included with the kernel-modules package
have been updated.
Networking Acceleration Patch Added
Version 4.1.0-beta1 supports Linux's NAPI patch for accelerated networking with
lower CPU overhead. Currently, only on-board and expansion Intel chipset
Ethernet ports on ImageStream routers take advantage of this new technology.
The use of NAPI along with updated drivers for Intel-based Ethernet ports on
ImageStream routers yields approximately 85-100% additional throughput compared
to earlier 4.0 releases.
NET-SNMP 5.0.3 Included
Version 4.1.0-beta1 adds Version 5.0.3 of the NET-SNMP package. The latest
versions of NET-SNMP support SNMP version 3, as well as a new module API for
easy addition of new MIBs.
IPSec/FreeSWan Version 1.98b Included
Version 4.1.0-beta1 adds the latest version of the FreeSWan IPSec package. The
IPSec implementation has also been patched to support X.509. The version
included 4.1.0-beta1 does not support the use of X.509 and RSA keys. This
incompatibility will be fixed in Version 4.1.0-beta2.
Zebra Version 0.93a Included
Version 0.93a of Zebra is included in Version 4.1.0-beta1. This version of
Zebra fixes an OSPF crush problem for ospfd and ospf6d and adds new
configuration for BGP. ImageStream does not provide technical support for
Zebra, but provides the package as a convenience to users who are familiar with
Zebra or prefer to use it instead of ImageStream's version of GateD.
Quality of Service Package Updated
The quality of service utility, "tc", has been updated in Version 4.1.0-beta1.
The new version supports additional options and updates support for common
queuing schemes, including HTB.
Advanced IP Routing Utility Updated
iproute2, the advanced IP routing utility including with ImageStream routers has
been updated in Version 4.1.0-beta1. The new version supports additional
options and updates support for advanced rule-based routing schemes.
Firewalling Utility Updated
iptables, the advanced IP firewalling/packet filtering utility including with
ImageStream routers has been updated in Version 4.1.0-beta1. The new version
updates queuing schemes and adds support for the following advanced routing
-Packet IPv4 option stripping
-NAT table targeting and mapping for easier 1:1 NAT across entire subnets
-Advanced connection track matching options (state, protocol, original
source/destination, reply source/destination, status, expiration)
-Nth packet matching
-Packet class/type matching (eg. broadcast, multicast, etc.)
-Matching based on time (start time, stop time, day of the week)
-Patch to allow TFTP through NAT
Bugs fixed in Version 4.1.0-beta1
The following bugs have been fixed in Version 4.1.0-beta1:
Ethernet Status Reporting Error With R1 Fixed
Under previous 4.0.x releases, the on-board Ethernet port on newer R1 routers
reported incorrect link status information in the interface statistics program,
"stats". The reporting problem did not affect the operation of the Ethernet
port, andy only provided confusing status information. The version of SAND
included with Version 4.1.0-beta1 correctly reports the status of the on-board port.
Limitations and Upgrade Instructions
*** NOTE! If the upgrade fails, do NOT reboot! Contact ImageStream's Technical
Support without rebooting. ***
Upgrading to Version 4.0 or later requires the following:
1. 64 MB of RAM or higher.
2. 32 MB of flash.
3. 300 MHz processor or better.
4. Enterprise Linux Version 2.3.2 or higher.
The upgrade utility will not install Version 4.0 if memory and flash
requirements are not met. Users can contact ImageStream to purchase a RAM,
processor or flash upgrade.
Users running an Enterprise Linux version less than 2.3.2 must upgrade before
Version 4.0 will be available from the Update menu. Upgrading any version prior
to 2.3.2 will automatically be upgraded to 2.3.2. A second upgrade will be
required to install Version 4.0.
The upgrade does not otherwise affect the stored configuration in the
ImageStream router. To back up the router's configuration prior to upgrading,
choose option 4 (Backup/Restore) from the router's main menu. Choose the Backup
methods option (Option 1) and select a method from the choices listed. From the
router's command line, use the "backup" command. The backup utility takes four
arguments: flash (to back up configurations to the router's nonvolatile flash
memory), floppy (to back up to a floppy disk), scp (to back up via secure copy),
or file (to back up to a separate file on the router's nonvolatile flash
Copyright and Trademarks
Copyright 2002 ImageStream Internet Solutions. All rights reserved.
ImageStream is a trademarks of ImageStream Internet Solutions, Inc. All other
marks are the property of their respective owners.
ImageStream makes no representations or warranties with respect to the contents
or use of this document, and specifically disclaims any express or implied
warranties of merchantability or fitness for any particular purpose. Further,
ImageStream reserves the right to revise this publication and to make changes to
its content, any time, without obligation to notify any person or entity of such
revisions or changes.
Contacting ImageStream Technical Support
Every ImageStream product comes with a one year hardware and software warranty.
ImageStream provides technical support via voice, FAX, electronic mail, and the
web. Technical support is available 24 hours a day, 7 days a week.
To contact ImageStream technical support by voice, dial +1 (574) 935-8484
worldwide. By FAX, dial +1 (574) 935-8488. By electronic mail, send mail to
firstname.lastname@example.org. Using the World Wide Web, see