Dell PowerConnect J-8216 Software Guide for JUNOS version 10.3 - Page 3171

Chapter 122: Configuring MPLS Configuring the Primary Path The primary statement creates the primary path, which is the LSP's preferred path. The secondary statement creates an alternative path if the primary path can no longer reach the egress provider edge switch. In the tasks described in this topic, the lsp-name has already been configured on the ingress provider edge switch as lsp_to_240 and the loopback interface address on the remote provider edge switch has already been configured as 127.0.0.8. When the software switches from the primary to the secondary path, it continuously attempts to revert to the primary path, switching back to it when it is again reachable but no sooner than the retry time specified in the revert-timer statement. You can configure zero primary paths or one primary path. If you do not configure a primary path, the first secondary path (if a secondary path has been configured) is selected as the path. If you do not specify any named paths, or if the path that you specify is empty, the software makes all routing decisions necessary for the packets to reach the egress provider edge switch. To configure a primary path: 1. Create the primary path for the LSP: [edit protocols mpls label-switched-path lsp_to_240 to 127.0.0.8] user@switch# set primary primary_path_lsp_to_240 2. Configure an explicit route for the primary path by specifying the IP address of the loopback interface or the switch IP address or hostname of each switch used in the MPLS tunnel. You can specify the link types as either strict or loose in each path statement. If the link type is strict, the LSP must go to the next address specified in the path statement without traversing other switches. If the link type is loose, the LSP can traverse through other switches before reaching this switch. This configuration uses the default strict designation for the paths. NOTE: You can enable path protection without specifying which provider switches are used. If you do not list the specific provider switches to be used for the MPLS tunnel, the switch calculates the route. TIP: Do not include the ingress provider edge switch in these statements. List the IP address of the loopback interface or switch address or hostname of all other switch hops in sequence, ending with the egress provider edge switch. [edit protocols mpls label-switched-path lsp_to_240 to 127.0.0.8] user@switch# set path primary_path_lsp_to_240 127.0.0.2 user@switch# set path primary_path_lsp_to_240 127.0.0.3 user@switch# set path primary_path_lsp_to_240 127.0.0.8 3099