120 Bridging
LAN Server Subsystem
LAN Server Subsystem
What is It? The LAN Server Subsystem (LSS) software lets PathBuilder S200 series switches
such as the PathBuilder S200 series switch communicate with an IBM LAN
Manager to provide the following support for Token Ring Source Route Bridging
applications:
• Ring Error Monitor (REM)
• Configuration Report Server (CRS)
• Ring Parameter Server (RPS)
• LAN Bridge Server
What You Need to
Configure The LAN Server Subsystem (LSS) Record is configured for the Token Ring/Source
Route Bridging LAN port. A Node boot is required to restart the LSS or implement
LSS parameter changes.
Passwords The default LSS link passwords for links 0 through 3 are initially set to
“PASSWORD.” This password is used by the IBM LAN Network Manager to
establish a connection to the 3Com bridge’s LSS. Defau lt pa sswords can be changed
by the LAN Manager. There is no facility to examine or change the passwords from
the bridge’s human interface.
Also, it is recommended that you leave the parameter Calculation Interval at the
default setting of 10 seconds to avoid conflict with the LNM.
Ring Error Monitor A REM observes, collects, and analyzes hard error and soft error reports sent by
stations on a single ring and assists in fault isolation and correction.
One or more ring error monitors can reside on a ring. If no REMs are on a particular
ring, it is not possible to monitor errors for that ring.
One or more REMs can report to a LAN manager.
A REM has a functional address of C000000008.
Configuration
Report Server A CRS accepts commands from the LAN Manager to get station information, set
station parameters, and remove stations from its ring. Italso collects and forwards
configuration reports generated by stations on its ring to the LAN manager.
Information such as reporting a new active monitor and reporting a stored upstream
address change are sent to the CRS.
A configuration report server has a functional address of C00000000010.
Ring Parameter
Server An RPS resides on each ring in a multiple-ring environment for which operational
parameters are being managed, and provides three main services:
• Sends initialization information to new stati ons that are attaching to the ring.
• Ensures that stations on the ring have consistent values for operational
parameters.
• Forwards registration information to LAN ma nagers from stations attaching
to the ring.