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Maintain a Single Configuration File for Both Routing Engines
Purpose
For routers that support multiple Routing Engines, you can specify re0 and re1 as group names to ensure that the correct IP addresses are used for each Routing Engine and to maintain a single configuration file for both Routing Engines. It is important that the names of the Routing Engines correspond to a slot position because the names re0 and re1 are special group names that you must use for the Routing Engines to recognize which configuration statement to use. Routing Engine 0 must be in slot position 0 and must be named re0, and Routing Engine 1 must be in slot position 1 and must be named re1.
To maintain a single configuration file for both Routing Engines, follow these steps:
Configure the New Group
Purpose
Each re0 or re1 group typically contains, at a minimum, the configuration for the hostname and the management interface (fxp0). If each Routing Engine uses a different management interface, the group must also contain the configuration for the backup router and static routes.
Action
To configure the re0 and re1 groups, follow these steps:
In configuration mode, go to the following hierarchy level:
[edit]user@host# edit groupsConfigure the group:
[edit groups]user@host# set group-nameFor example:
[edit groups]user@host# set re0To configure the management interface, go to the following hierarchy level:
[edit groups]user@host# edit groups re0Include the following statement:
[edit groups re0]user@host# set interfaces interface-name unit unit family inet address addressFor example:
[edit groups re0]user@host# set interfaces fxp0 unit 0 family inet address 1.1.1.1/24To configure the hostname, go to the following hierarchy level:
[edit groups re0]user@host# edit groups re0 systemInclude the following statement:
[edit groups re0 system]user@host# set host-name hostnameFor example:
[edit groups re0 system]user@host# set host-name foo-re0Verify the configuration:
[edit groups re0]user@host# showre0 {system {host-name foo-re0;}interfaces {fxp0 {unit 0 {family inet {address 1.1.1.1/24;}}}}}Commit the configuration:
user@host# commitRepeat Step 1 through Step 8 for the re1 group.
Meaning
The sample output in Step 7 shows that the re0 group contains the minimum configuration for a group, the hostname, and the management interface (fxp0). If each Routing Engine uses a different management interface, the group must also contain the configuration for the backup router and static routes.
Apply the New Group
Action
To apply the re0 group to maintain a single configuration file for both Routing Engines, follow these steps:
In configuration mode, go to the top hierarchy level and include the following statement:
user@host# [edit]user@host# set apply-groups group-nameFor example:
user@host# [edit]user@host# set apply-groups re0Verify the configuration:
user@host# showgroups {re0 {system {host-name foo-re0;}interfaces {fxp0 {unit 0 {family inet {address 1.1.1.1/24;}}}}}re1 {system {host-name foo-re1;}interfaces {fxp0 {unit 0 {family inet {address 1.1.1.2/24;}}}}}}apply-groups [ re0 re1 ];Commit the configuration:
user@host# commit
Meaning
The sample output shows that each group, re0 and re1, has its own IP address that is used for each Routing Engine to maintain a single configuration file.