Example: MX-series Ethernet Ring Protection

The following example configures Ethernet ring protection for three MX-series router nodes. The links connecting the routers are shown in Figure 17.

Figure 17: Ethernet Ring Protection Example Nodes

This example uses the following topology details for Ethernet ring protection:

• Router 1 is the RPL owner. The node identification for Router 1 is MAC address 00:01:01:00:00:01.
• The RPL link is ge-1/0/1.1 (this is also the R-APS messaging control channel).
• Traffic flows among the nodes in the configured bridge domains. (That is, only the control channels are configured.)
• Router 1’s east control channel interface is ge-1/0/1.1 (the RPL) and the west control channel interface is ge-1/2/4.1. The protection group is pg101.
• Router 2’s east control channel interface is ge-1/0/2.1 (the RPL) and the west control channel interface is ge-1/2/1.1. The protection group is pg102.
• Router 3’s east control channel interface is ge-1/0/3.1 (the RPL) and the west control channel interface is ge-1/0/4.1. The protection group is pg103.

Note: Although not strictly required for physical ring protection, this example configures Ethernet OAM with MEPs.

Router 1 (RPL owner) configuration

1. Configure the interfaces:

   [edit]

   interfaces {

   ge-1/0/1 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   ge-1/2/4 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   }

2. Configure the bridge domain:

   [edit]

   bridge-domains {

   bd1 {

   domain-type bridge;

   interface ge-1/2/4.1;

   interface ge-1/0/1.1;

   }

   }

3. Configure the Ethernet ring protection gorup:

   [edit]

   protocols {

   protection-group {

   ethernet-ring pg101 {

   node-id 00:01:01:00:00:01;

   ring-protection-link-owner;

   east-interface {

   control-channel ge-1/0/1.1;

   ring-protection-link-end;

   }

   west-interface {

   control-channel ge-1/2/4.1;

   }

   }

   }

   }

4. Configure Ethernet OAM:

   [edit]

   protocols {

   oam {

   ethernet {

   connectivity-fault-management {

   action-profile rmep-defaults {

   default-action {

   interface-down;

   }

   }

   maintenance-domain d1 {

   level 0;

   maintenance-association 100 {

   mep 1 {

   interface ge-1/0/1;

   remote-mep 2 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   maintenance-domain d2 {

   level 0;

   maintenance-association 100 {

   mep 1 {

   interface ge-1/2/4;

   remote-mep 2 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   }

   }

   }

   }

Router 2 configuration

1. Configure the interfaces:

   [edit]

   interfaces {

   ge-1/0/2 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   ge-1/2/1 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   }

2. Configure the bridge domain:

   [edit]

   bridge-domains {

   bd1 {

   domain-type bridge;

   interface ge-1/2/1.1;

   interface ge-1/0/2.1;

   }

   }

3. Configure the Ethernet protection group:

   [edit]

   protocols {

   protection-group {

   ethernet-ring pg102 {

   east-interface {

   control-channel ge-1/0/2.1;

   }

   west-interface {

   control-channel ge-1/2/1.1;

   }

   }

   }

   }

4. Configure Ethernet OAM:

   [edit]

   protocols {

   oam {

   ethernet {

   connectivity-fault-management {

   action-profile rmep-defaults {

   default-action {

   interface-down;

   }

   }

   maintenance-domain d1 {

   level 0;

   maintenance-association 100 {

   mep 2 {

   interface ge-1/2/1;

   remote-mep 1 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   maintenance-domain d3 {

   level 0;

   maintenance-association 100 {

   mep 1 {

   interface ge-1/0/2;

   remote-mep 2 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   }

   }

   }

   }

Router 3 configuration

1. Configure the interfaces:

   [edit]

   interfaces {

   ge-1/0/4 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   ge-1/0/3 {

   vlan-tagging;

   encapsulation flexible-ethernet-services;

   unit 1 {

   encapsulation vlan-bridge;

   vlan-id 100;

   }

   }

   }

2. Configure the bridge domain:

   [edit]

   bridge-domains {

   bd1 {

   domain-type bridge;

   interface ge-1/0/4.1;

   interface ge-1/0/3.1;

   }

   }

3. Configure the Ethernet protection group:

   [edit]

   protocols {

   protection-group {

   ethernet-ring pg103 {

   east-interface {

   control-channel ge-1/0/3.1;

   }

   west-interface {

   control-channel ge-1/0/4.1;

   }

   }

   }

   }

4. Configure Ethernet OAM:

   [edit]

   protocols {

   oam {

   ethernet {

   connectivity-fault-management {

   action-profile rmep-defaults {

   default-action {

   interface-down;

   }

   }

   maintenance-domain d2 {

   level 0;

   maintenance-association 100 {

   mep 2 {

   interface ge-1/0/4;

   remote-mep 1 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   maintenance-domain d3 {

   level 0;

   maintenance-association 100 {

   mep 2 {

   interface ge-1/0/3;

   remote-mep 1 {

   action-profile rmep-defaults;

   }

   }

   }

   }

   }

   }

   }

   }

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