Black Box LR11xx Series Router Configurations Guide
each end if necessary. The frame switches are configured for DLCIs 101, 102, and 103 on the respective T1s. In this example, the Black Box LR1114A configurations are almost identical. The primary difference is the IP address assigned to the AVC. The configuration for the left LR1114A is shown below.
27.1.1.1# Configure Ethernet interface
Blackbox/configure> interface ethernet 0 Blackbox/configure/ethernet0> ip addr 192.168.1.1 255.255.255.0 Blackbox/configure/ethernet0> exit
27.1.1.2# Configure CVC1
Blackbox/configure> interface bundle cvc1
Blackbox/configure/interface/bundle cvc1> link t1 1
Blackbox/configure/interface/bundle cvc1> encapsulation frelay
Blackbox/configure/interface/bundle cvc1> fr
Blackbox/configure/interface/bundle cvc1/fr> intf_type dte
Blackbox/configure/interface/bundle cvc1/fr> pvc 101
Blackbox/configure/interface/bundle cvc1/fr> exit 3
27.1.1.3# Congfigure CVC2
Blackbox/configure> interface bundle cvc2 Blackbox/configure/interface/bundle cvc2> link t1 2 Blackbox/configure/interface/bundle cvc2> encapsulation frelay Blackbox/configure/interface/bundle cvc2> fr Blackbox/configure/interface/bundle cvc2/fr> intf_type dte Blackbox/configure/interface/bundle cvc2/fr> pvc 102 Blackbox/configure/interface/bundle cvc2/fr> exit 3
27.1.1.4# Configure CVC3
Blackbox/configure> interface bundle cvc3
Blackbox/configure/interface/bundle cvc3> link t1 2
Blackbox/configure/interface/bundle cvc3> encapsulation frelay
Blackbox/configure/interface/bundle cvc3> fr
Blackbox/configure/interface/bundle cvc3/fr> intf_type dte
Blackbox/configure/interface/bundle cvc3/fr> pvc 103
Blackbox/configure/interface/bundle cvc3/fr> exit 3
27.1.1.5 #Configure AVC
Blackbox/configure> interface avc frf15 100 Blackbox/configure/interface/avc frf15 100> cvc 101 cvc1 Blackbox/configure/interface/avc frf15 100> cvc 102 cvc2 Blackbox/configure/interface/avc frf15 100> cvc 103 cvc 3 Blackbox/configure/interface/avc frf15 100> ip address 11.1.1.1 255.255.255.252 Blackbox/configure/interface/avc frf15 100> exit
Blackbox> configure
The above configuration does not include statements for policing and traffic shaping, so all PVCs are given the full CIR for the interface. Once the AVC is configured, the Black Box systems can be configured for transparent IP multiplexing or for static routing. These details are omitted.
The primary advantage of FRF.15 is that no support is required on the POP side of the network. That fact makes this standard ideal for companies that need increased bandwidth for their frame relay based private network. FRF.15 is more susceptible to differential delay because the multiplexed links extend well beyond the local loop. Fortunately, differential delay encountered within the United States is typically small enough to have little to no impact on actual traffic flow.
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