Figure 120: Ce-Side Load-Balancing Topology - Juniper JUNOSE SOFTWARE FOR E SERIES 11.0.X - BGP AND MPLS CONFIGURATION GUIDE 2009-12-30 Configuration Manual

JUNOSe 11.0.x BGP and MPLS Configuration Guide
Configuring Load-Balancing Groups
Load-balancing groups are a legacy method of configuring CE-side load balancing. It
was the only method available before Release 7.1.0. Load-balancing groups enable
you to configure attributes for a group that are inherited by the member shim
interfaces (Figure 120 on page 536).

Figure 120: CE-Side Load-Balancing Topology

In the topology shown in Figure 120 on page 536, the two Ethernet ports on PE 1 (2/0
and 3/1) are connected to an 802.3ad-compliant switch, and comprise the set of
candidate ports. Three VLAN subinterfaces are configured on each port.
Load-balancing group 100 includes three Martini circuits, one for each pair of
subinterfaces on the ports. That is, three circuits were created: one for the pair 2/0.1
and 3/1.10, one for the pair 2/0.2 and 3/1.20, and one for the pair 2/0.3 and 3/1.30.
Each of the three Martini circuits connects to a remote PE router. The remote PE
router receives and sends only a single VC label for each circuit.
Traffic from the switch can be received on all ports and sent over the appropriate
Martini circuit. For example, traffic from CE 1 to be sent over Martini circuit 1 could
arrive on port 2/0 or 3/1 and still be appropriately forwarded.
536
Configuring CE-Side Load Balancing for Martini Layer 2 Transport