Figure 59: APS for a Layer 2 Circuit Topology Diagram
Figure 59 shows that APS is configured on a PE router to protect a PE-CE link in a Layer 2 circuit. This example shows only the PE router configuration and assumes that you have preconfigured a full Layer 2 circuit topology. For more information about configuring Layer 2 circuits, see Configuring Layer 2 Circuits.
On Router PE1, configure ATM2 IQ interface at-0/0/1 as an APS protect circuit and ATM2 IQ interface at-1/3/1 as a working circuit. Also, configure the working circuit interface as the primary interface for your Layer 2 circuit and configure the protect circuit interface as the protected interface for your Layer 2 circuit.
Router PE1
- [edit]
- chassis {
-
- fpc 0 {
-
- pic 0 {
-
-
atm-l2circuit-mode {
-
cell; #
This dedicates FPC 0 PIC 0 to cell-relay mode.
- }
- }
- }
-
- fpc 1 {
-
- pic 3 {
-
-
atm-l2circuit-mode {
-
cell; #
This dedicates FPC 1 PIC 3 to cell-relay mode.
- }
- }
- }
- }
- interfaces {
-
- at-0/0/1 {
- description "To CE1 at-0/1/2";
- encapsulation atm-ccc-cell-relay;
-
- sonet-options {
-
- aps {
-
protect-circuit TEST; # This interface is the APS protect circuit.
- }
- }
-
- atm-options {
- pic-type atm2;
- promiscuous-mode;
- }
-
- unit 0 {
- allow-any-vci;
- }
- }
-
- at-1/3/1 {
- description "To CE1 at-0/1/1";
- encapsulation atm-ccc-cell-relay;
-
- sonet-options {
-
- aps {
-
working-circuit TEST; # This interface is the APS working circuit.
- }
- }
-
- atm-options {
- pic-type atm2;
- promiscuous-mode;
- }
-
- unit 0 {
- allow-any-vci;
- }
- }
- }
- protocols {
-
- l2circuit {
-
- neighbor 10.255.17.4 {
-
-
interface at-1/3/1.0
{ # The Layer 2 circuit interface is the working circuit.
-
protect-interface at-0/0/1.0; # The protect-interface is the protect
circuit.
- virtual-circuit-id 100;
- }
- }
- }
- }
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