Paradyne FrameSaver SLV 9124, Technical Reference

Page: 145 / 346

Configuration
8-23
9124-A2-GH30-00 June 1999 - Preliminary
Configuring System Frame Relay and LMI Options
Select Frame Relay and LMI to display or change the Frame Relay and LMI
options for the system (see Table 8-1). Follow this menu selection sequence:
Main Menu
→
Configuration
→
System
→
Frame Relay and LMI
Table 8-1. System Frame Relay and LMI Options (1 of 2)
LMI Behavior
Possible Settings: Independent, Port-1_Follows_Net1-FR1,
Net1-FR1_Follows_Port-1, Port-1_Codependent_with_Net1-FR1
Default Setting: Independent
Configures the network data port to allow the state of the LMI to be passed from one
interface to another, determining how the FrameSaver unit will handle a change in the
LMI state. Sometimes referred to as LMI pass-through.
Independent – Handles the LMI state of each interface separately so that the LMI state
of one interface has no effect on the LMI state of another interface. Provides LMI
Spoofing. This is the recommended setting for Network Service Providers (NSPs).
Port-1_Follows_Net1-FR1 – Brings LMI down on Port-1 when LMI on the network
interface goes down, disabling Port 1 and deasserting its control leads. When LMI on the
network interface comes back up, Port-1 is reenabled and its control leads are
reasserted. The LMI state on Port-1 has no effect on the LMI state on the network
interface. That is, Port-1’s LMI follows the network interface’s LMI. This setting is useful
if the router connected to Port-1 is used to initiate recovery when network failures are
detected.
Net1-FR1_Follows_Port-1 – Brings LMI down on the network interface when LMI on
Port-1 goes down, disabling the network interface and deasserting its control leads.
When LMI on Port-1 comes back up, the network interface is reenabled. The LMI state
on the network interface has no effect on the LMI state on Port-1. That is, the network
interface’s LMI follows Port-1’s LMI. Used at central sites, this setting is useful when the
remote site router on the other end of the PVC connection can initiate recovery via a
redundant central site when there is a catastrophic central-site LAN or router failure. Not
recommended for NSPs.
Port-1_Codependent_with_Net1-FR1 – Brings LMI down on the network interface
when LMI on Port-1 goes down (or LMI down on Port-1 when LMI on the network
interface goes down), and allows LMI to come back up when LMI comes back on both
interfaces. That is, the LMI state for one interface is dependent on the other. Use this
setting when backup will be performed by the router. It is not recommended since it
makes fault isolation more difficult.
LMI Error Event (N2)
Possible Settings: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Default Setting: 3
Configures the N2 parameter which sets the number of errors that can occur on the LMI
link before reporting an error. Applies to both the user and network sides of the UNI.
1 – 10 – Specifies the number of errors that can occur on the LMI link (inclusive).