Juniper EX9200 Features Manual page 63

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the CE routers and one for the PE routers. Therefore, the maximum number of user-defined
mesh groups is 14 for MX Series routers and 126 for M Series and T Series routers.
NOTE: In the VPLS documentation, the word router in terms such as PE router
is used to refer to any device that provides routing functions.
The Junos OS supports both forwarding equivalency class (FEC) 128 and FEC 129. FEC
129 uses VPLS autodiscovery to convey endpoint information. FEC 128 requires manually
configured pseudowires.
The following describes the behavior of mesh groups in regards to BGP-signaled PE
routers and LDP-signaled PE routers:
BGP-signaled PE routers—Automatically discovered PE routers that use BGP for
signaling are associated with the default VE mesh group. You cannot configure the
Junos OS to associate these routers with a user-defined VE mesh group.
LDP-signaled PE routers (FEC 128)—PE routers statically configured using FEC-128
LDP signaling are placed in a default mesh group. However, you can configure a VE
mesh group and associate each LDP FEC-128 neighbor with it. Each configured VE
mesh group contains a set of VEs that are in the same interior gateway protocol (IGP)
routing instance and are fully meshed with each other in the control and data planes.
LDP-signaled PE routers (FEC 129)—Configuration for a mesh group for FEC 129 is very
similiar to the configuration for FEC 128.
Note the following differences for FEC 129:
Each user-defined mesh group must have a unique route distinguisher. Do not use
the route distinguisher that is defined for the default mesh group at the
hierarchy level.
routing-intances]
Each user-defined mesh group must have its own import and export route target.
Each user-defined mesh group can have a unique Layer 2 VPN ID. By default, all the
mesh groups that are configured for the a VPLS routing-instance use the same Layer
2 VPN ID, the one that you configure at the
Example: Configuring BGP Autodiscovery for LDP VPLS
Chapter 4: Assigning Routing Instances to VPLS
hierarchy level.
[edit routing-instances]
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