The VPLS implementation on a J-series Services Router is similar
to VPLS implementations on M-series, T-series, and MX-series routers,
with the following exceptions:
Services Routers do not support aggregated Ethernet interfaces.
Therefore, aggregated Ethernet interfaces between CE devices and PE
routers are not supported for VPLS routing instances on Services Routers.
VPLS routing instances on Services Routers use BGP to
send signals to other PE routers. LDP signaling is not supported.
VPLS multihoming, which allows connecting a CE device
to multiple PE routers to provide redundant connectivity, is not supported
on Services Routers.
Services Routers do not support BGP mesh groups.
Services Routers only support the following encapsulation
types on VPLS interfaces that face CE devices: extended VLAN VPLS,
Ethernet VPLS, and VLAN VPLS. Ethernet VPLS over ATM LLC encapsulation
is not supported.
Virtual ports are generated dynamically on a Tunnel Services
PIC on some Juniper Networks routing platforms. Services Routers do
not support Tunnel Services modules or virtual ports.
The VPLS implementation on Services Routers does not support
dual-tagged frames. Therefore, VLAN rewrite operations are not supported
on dual-tagged frames. VLAN rewrite operations such as pop-pop, pop-swap,
push-push, swap-push, and swap-swap, which are supported on M-series
and T-series routing platforms, are not supported on Services Routers.
