Creating a Multihomed Group
In Junos Space, you can create a multihomed group to connect a customer site to multiple PE routers to provide redundant connectivity across a VPLS site. A VPLS site multihomed to two or more N-PE routers provides redundant connectivity in the event of a PE-router-to-CE-device link failure or the failure of an N-PE router.
To create one or more multihomed groups, complete the following tasks:
Creating a Connectivity File for Multihomed Groups
The connectivity file can include one or more multihomed groups. Each multihomed group defines an access switch that is connected to one primary PE device and one or more backup PE devices.
The following requirements must be met before you create a connectivity file for a multihomed group:
Perform device discovery to import the N-PE devices that you want to include in the multihomed group.
Pre-stage the N-PE devices that you want to include in the multihomed group.
You must create an XML file to define connectivity for the PE devices in a multihomed group. You can specify any name for the connectivity file, but it must be a valid XML file that includes the following attributes:
Name—Multihomed group name.
Description—Multihomed group description.
AccessSwitchIP—IP address for the CE device.
PEHostName—Hostname for the N-PE device. Include two or more hostnames to identify the primary and secondary PE devices in the multihomed group.
By default, the first PEHostname specifies the primary device.
PEInterface—UNI on the N-PE device that connects to the CE device. Each multihomed group must specify the interface for the primary and secondary PE devices.
AccessSwitchInterface—UNI on the CE device that connects to the primary or secondary PE device.
The following sample XML file shows the format you use to configure multihomed groups:
<!— List of unmanaged connections for an Access Switch not currently modeled in Junos Space <MultihomedGroups> <MultihomedGroup Name="group1" Description="multihomed group1" AccessSwitchIP="10.157.59.63"> <MultihomedEndPoint PEHostName="PEHostName1" PEInterface="ge-2/0/1" AccessSwitchInterface="ge-1/0/4"/> <MultihomedEndPoint PEHostName=”PEHostName2” PEInterface=”ge-2/0/2” AccessSwitchInterface=”ge-1/0/5"/> </MultihomedGroup> <MultihomedGroup Name="group2" Description="multihomed group2" AccessSwitchIP="10.155.50.60"> <MultihomedEndPoint PEHostName="PEHostName3" PEInterface="ge-2/0/1" AccessSwitchInterface="ge-1/0/4"/> <MultihomedEndPoint PEHostName=”PEHostName4” PEInterface=”ge-2/0/2” AccessSwitchInterface=”ge-1/0/5"/> <MultihomedEndPoint PEHostName=”PEHostName5” PEInterface=”ge-3/0/2” AccessSwitchInterface=”ge-1/0/6"/> </MultihomedGroup> </MultihomedGroups>
In the preceding sample connectivity file, the first multihomed group, multihomed group1, defines two PE devices in which PEHostName1 is the primary PE device and PEHostName2 is the backup PE device. The second multihomed group, multihomed group2, defines two PE devices in which PEHostName3 is the primary PE device and PEHostName4 and PEHostName5 are backup PE devices.
To view a sample connectivity file for multihomed groups, see Viewing a Sample Connectivity File for Multihomed Groups.
Uploading a Connectivity File to Create Multihomed Groups
To create multihomed groups, you upload the connectivity file in the Junos Space software. You create and upload a single connectivity file for all the multihomed groups you want to configure in Junos Space. To add additional multihomed groups at a later date, you can update the connectivity file and then upload the connectivity file in Junos Space again.
To upload a connectivity file and create a multihomed group:
- In the Network Activate task pane, click Prestage
Devices > Manage Multihomed... > Create Multihomed....
The Create Multihomed Groups screen appears.
- To upload a Connectivity file for multihomed groups:
- In the Connectivity File field, click Browse.
- Navigate to the XML connectivity file that you want to use to create the multihomed group.
- Click Upload.
- (Optional) To view job status information, click the Job ID.
- Click OK to upload the connectivity file in Junos Space.