Configuration Options
4-8 9783-A2-GB20-00
July 2000
Configuring Frame Relay and LMI for the System
Select Frame Relay and LMI from the System menu to display or change the
Frame Relay and LMI options for the entire system (see Table 4-2).
Main Menu
→
Configuration
→

System

→

Frame Relay and LMI

Table 4-2. 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: Port-1_Codependent_with_Net1-FR1
Configures the device to allow the state of the LMI on Port-1 or ILMI on the network
interface to be passed from one interface to another, determining how the unit will
handle a change in the LMI or ILMI state. Sometimes referred to as LMI pass-through.
Independent – Handles the state of each interface separately so that the LMI state of
Port-1 has no effect on the ILMI state of the network interface, and vice versa.
Net1-FR1_Follows_Port-1 – Brings VCs cross-connected to Port-1 down on the
network interface when LMI on Port-1 goes down. When LMI on Port-1 comes back up,
the network VCs are reenabled. 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_Follows_Net1-FR1 – Brings LMI down on Port-1 upon a physical failure or ATM
failure. When the alarm on the network interface is cleared, Port-1 is reenabled and its
control leads are reasserted. This setting is useful if the router connected to Port-1 is
used to initiate recovery when network failures are detected.
Port-1_Codependent_with_Net1-FR1 – Brings VCs cross-connected to Port-1 down
on the network interface when LMI on Port-1 goes down (or LMI down on Port-1 when a
physical failure or ATM failure occurs on the network interface), and brings VCs
cross-connected to Port-1 up on the network interface when LMI on Port-1 comes up (or
LMI up on Port-1 when a physical failure or ATM failure is cleared on the network
interface). Use this setting when backup is through the router instead of the unit. Note
that when the router is disconnected, the NSP cannot access the unit using multiplexed
VCs.
Traffic Policing
Possible Settings: Enable, Disable
Default Setting: Disable
Determines whether or not CIR (Committed Information Rate) and EIR (Excess
Information Rate) will be enforced by the unit on frames being sent on network frame
relay links.
Enable – CIR and EIR are enforced.
– Frames that exceed CIR will be marked Discard Eligible (DE). These frames are
counted in the Above CIR but within EIR category until this category is full.
Once full, additional frames are counted as being in the Within CIR category.
– Frames in excess of EIR will be discarded.
Disable – CIR and EIR are not enforced.