ComOS 3.7 Release Note
Introduction
The new Livingston Enterprises ComOS(TM) 3.7 software release is now
available for all PortMaster(TM) products. This release is provided at no
charge to all Livingston customers.
This release note documents commands and features added between ComOS
release 3.5 and 3.7. There is no ComOS release 3.6.
Note - You must use PMconsole(TM) 3.5.3 when upgrading to ComOS 3.7; see
"Upgrade Instructions" below. If you are running Windows 95 or Windows
NT 4.0 you must use PMconsole for Windows 3.5.1.4. Read "Memory
Requirements" and "Upgrade Instructions" thoroughly before upgrading.
Contents
Introduction
New Features in ComOS 3.7
PortMaster 3 Channelized T1
K56flex
Compression
BGP Routing
Leased Line ISDN
Route Propagation Control
Idle Time special value
Multiple Subscriber Network for OR-ST
Improved ISDN BRI debugging
Improved Synchronous Port Performance
Improved Routing
Easier-to-manage Frame Relay DLCI lists
Frame Relay Subinterfaces Increased
Improved Multilink PPP
New attributes in RADIUS for the PortMaster 3
Improved Packet Tracing
ChoiceNet Debugging
Packet Filtering
SNMP improvements
Improved V.42bis in PortMaster 3
Non-standard Traceroute supported
Office Router now supports itr4
Bugs Fixed in ComOS 3.7
Channelized T1 Configuration
Support for K56flex
New Termination Codes for True Digital 56K Card
OSPF and Frame Relay
Multiple Subscriber Network for S/T Interfaces
New BRI Debugging Commands
Memory Requirements
Upgrade Instructions
New Features in ComOS 3.7
PortMaster 3 Channelized T1
The PortMaster 3 now supports dial-in over channelized T1 using
standard 56k "robbed-bit" lines. The PM-3 supports E&M wink start, E&M
immediate start, or FXS (foreign exchange station) loop start
signaling. See "Channelized T1 Configuration" below.
Note that because channelized T1 uses 56K channels and PRI uses 64K
channels, connect rates for modems over channelized T1 may be lower
than over PRI.
Dial-out over channelized T1 is not supported in this release.
Channelized E1 will be supported in a future release.
Sessions are now fully cleaned up or properly disconnected for dial-in
users that disconnect abnormally from a PortMaster 3 configured for FXS
loop start.
K56flex
The PortMaster 3 now supports the Livingston "True Digital 56K Card"
(MDM-56K-8 and MDM-56K-10) with support for K56flex modems. It
continues to support the older "True Digital V.34 Card" (MDM-PM3-8 and
MDM-PM3-10) at 28800bps and below.
See "Support for K56flex" below for more information. See
http://www.livingston.com/ for information on upgrades.
Compression
On the PortMaster Office Router, support has been added for software
STAC LZS compression over the PPP link at speeds of 128Kbps and below.
Software compression should not be used on links faster than 128Kbps.
ComOS 3.7 supports the new hardware STAC compression module (PM3-CMP)
on the PortMaster 3. STAC compression is automatically enabled when
the compression card is detected. This compression can be configured
on all types of PPP connections supported by the PM-3. This includes
dial-in via modem, ISDN or ISDN V.120 and leased line operation over
fractional T1/E1 or clear channel T1/E1. The PM-3 disables STAC
compression on a dial-in modem connection which is already running
V.42bis or MNP5 compression.
Compression can be enabled on network hardwired ports with the
"set S1 compress on|off|vj|stac" command, and for dialout locations with
the "set location Locname compress on|off|vj|stac" command.
on - use both kinds of compression
off - no compression
vj - use Van Jacobson TCP/IP Header Compression
stac - use Stac LZS data compression
Stac LZS compression does not need to be configured for dial-in users;
if requested during PPP negotiations and available, it is used.
BGP Routing
The PortMaster IRX and PortMaster 3 now support BGP (Border Gateway
Protocol) routing. For more information on configuring BGP see
"Configuring BGP" on Livingston's web site http://www.livingston.com/
or the upcoming revision of the "Configuration Guide for PortMaster
Products" and "Command Line Administrator's Guide".
A full BGP routing table for the entire Internet (44,000 routes)
requires seven (7) megabytes of memory, so before using BGP for that
you should upgrade your IRX or PM-3 to 16 megabytes of memory.
Additional routing peers will require about 2 megabytes per additional
peer beyond the first one. For more information on upgrading memory
consult the Installation Guide for your product, or see "Memory
Requirements" below.
Leased Line ISDN
This is a new feature targeted at the European market. In Europe there
exists a facility called Leased Line ISDN. Actually there is no ISDN
involved as there is no signaling involved and hence the term leased.
You can use any of the following configurations.
1. A single hardwired B channel (64Kbps)
2. Two separate hardwired B channels (2 X 64Kbps)
3. One hardwired B1 + B2 channel (128Kbps)
ISDN BRI ports may now be configured as network hardwired. You will
have to do a save all and reboot for changes to take affect.
BRI ports now support a line speed of 128000 (128Kbps). For example:
set s1 speed 1 128000
Only the first port on a given BRI line may be configured for 128Kbps
and when configured for 128Kbps the second port is still there but
placed into the NO_SERVICE state. Since in our BRI products the ports
are created and assigned at boot time, you will have to do a save all
and reboot for changes to take affect. Also for the same reason in the
case of 128Kbps on the first port, the remaining port can not be
removed without renumbering all ports, so it is placed in the
NO_SERVICE state.
One noticeable difference on the OR products is the operation of the LEDs.
NT1 This LED acts as before, tracking physical L1 state
S1-S2 These act differently for leased hardwired channels
If the L1 is down they are OFF
If the L1 is up but the associated port is not ESTABLISHED they FLASH
If L1 is up and associated port is ESTABLISHED then LED in ON
Command> show isdn d0
D00 status ------------------------------------------ BRI_NI1
Interface state: F7- active Layer1 state: active
Init count: 1 uptime: 4days last state change: 4days
recv count: 75159 xmit: 79418 errors: 0
numberplan type: Local plan: ISDN E.164
S1 ---------------------------------------------------------------
Ces state: Leased 64 last change: 0 Port state: ESTABLISHED