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Configuring Line Services
8-2 114078 Rev. A
Line Resource Manager (LRM)
The Line Resource Manager (LRM) is part of the Bay Networks router Circuit
Resource Manager (CRM) feature. LRM lets you define a certain percentage of a
particular line’s bandwidth as reservable. Applications that require a guaranteed
QoS can negotiate for the reservable bandwidth. When the router honors a
reservation request, the LRM allocates bandwidth from the reservable bandwidth,
reducing the bandwidth available for other requests.
Supported Media
You can enable the LRM on 10-Mb/s Ethernet, MCT1, HSSI, and synchronous
interfaces. LRM supports the following synchronous interface encapsulation
methods:
Point-to-Point Protocol (PPP)
Bay Networks Standard
Frame Relay
ATM DXI
How LRM Works with ST2
The following summarizes the exchange between the ST2 agent and the LRM.
1. The router receives an ST2 connect request.
The ST2 connect request includes a flow specification (flowspec) that
indicates the resources needed to meet the QoS.
2. ST2 passes the flowspec to the LRM.
3. The LRM compares the requested resources with available reservable
bandwidth.
LRM determines reservable bandwidth from configured values described later
in this chapter. It also accounts for any active reserved flows.
4. The LRM either reserves the necessary services or refuses service.
Note: You cannot use line resource management on a line you configured for
PPP multilink.
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