Example: Frame Relay to Fast Ethernet TCC Configuration
In the configuration example in Figure 32 , Router A uses Frame Relay to connect with Router B, while Router C connects to Router B by using Fast Ethernet. Router B acts as the Layer 2 virtual switch and transparently connects Router A to Router C.
You must enable Frame Relay encapsulation on Router A at the physical interface level.
Router A
[edit]
interfaces {
so-0/1/0 {
description "to Router B so-0/0/0";
encapsulation frame-relay;
unit 600 {
point-to-point;
dlci 600;
family inet {
address 1.1.1.1/30;
}
}
}
}
Router B acts as the virtual switch. Enable the appropriate TCC encapsulations on the corresponding interfaces. In this case, configure the encapsulation frame-relay-tcc option on the logical and physical interfaces of so-0/0/0.600. Next, add the ethernet-tcc encapsulation type to the physical interface of fe-1/0/0. To enable ARP, configure the remote MAC address or IP address of Router C's Fast Ethernet interface with the remote statement at the [edit interfaces interface-name unit 0 family tcc] hierarchy level. To enable proxy ARP, include the proxy statement at the [edit interfaces interface-name unit 0 family tcc] hierarchy level and specify the IP address of Router A.
After configuring the correct interface encapsulations, complete your cross-connect by adding both interfaces into your MPLS configuration. Include the same interfaces in the interface-switch statement at the [edit protocols connections] hierarchy level.
Router B
[edit]
interfaces {
so-0/0/0 {
description "to Router A so-0/1/0";
dce;
encapsulation frame-relay-tcc;
unit 600 {
point-to-point;
encapsulation frame-relay-tcc;
dlci 600;
}
}
fe-1/0/0 {
description "to Router C fe-0/0/0";
encapsulation ethernet-tcc;
unit 0 {
family tcc {
remote { # Addresses associated with the Ethernet TCC neighbor—Router C.
mac-address cc:cc:cc:cc:cc:cc;# Alternately, specify Router C's IP address 1.1.1.2 here.
}
proxy { # Addresses associated with the non-Ethernet TCC neighbor—Router A.
inet-address 1.1.1.1
}
}
}
}
}
protocols {
mpls {
interface so-0/0/0.600;
interface fe-1/0/0.0;
}
connections {
interface-switch FR-to-Ether {
interface so-0/0/0.600;
interface fe-1/0/0.0;
}
}
}
Ethernet encapsulation is the default for Router C. Because the Fast Ethernet connection is switched at Layer 2 to reach the Frame Relay link, it is transparent to Layer 3 addressing.
As a result, you must configure the IP address for the fe-0/0/0 interface in the same address space as Router A's so-0/1/0.600 interface.
Optionally, configure static ARP on the fe-0/0/0 interface if you omit the proxy statement on Router B. The arp statement must contain the IP address from interface so-0/1/0.600 on Router A and the MAC address of the Fast Ethernet interface on Router B.
Router C
[edit]
interfaces
fe-0/0/0 {
description "to Router B fe-1/0/0";
unit 0 {
family inet {
address 1.1.1.2/30 {
arp 1.1.1.1 mac bb:bb:bb:bb:bb:bb;# Configure this only if you did not enter aproxy
} # statement on Router B.
}
}
}
}