Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 576

JUNOSe 11.1.x BGP and MPLS Configuration Guide
Related Topics
Configuring CE-Side Load Balancing for Martini Layer 2 Transport
For layer 2 circuits over an MPLS core, each circuit normally has a single shim
interface on the local router. In the case of a local cross-connects configuration, each
end of the cross-connect has a single shim interface, creating a two-way cross-connect.
Alternatively, a given layer 2 circuit or each end of a local cross-connect can have
many shim interfaces. In these cases, traffic destined for the CE routers is
load-balanced among the multiple shim interfaces. This is known as CE-side load
balancing. In the case of Ethernet/VLANs, CE-side load balancing enables an E Series
router to interoperate with an 802.3ad switch.
You can configure load balancing in two different ways. You can configure many
shim interfaces with the same peer, VC type, and VC ID. Alternatively, you can use
the legacy method of configuring Martini circuits into load-balancing groups.
Configuring Many Shim Interfaces with the Same Peer, VC Type, and VC ID
The mpls-relay command enables you to specify the peer and the VC ID explicitly.
The VC type is either automatically determined by the layer 2 interface type or you
explicitly configure the VC type with the relay-format keyword in the mpls-relay
command.
For example, the following commands create a single layer 2 circuit to the remote
peer 10.9.1.3. Load balancing is established on two shim interfaces, fastEthernet
2/0.1 and fastEthernet 3/0.1. The VC type is determined by the layer 2 interface type.
540
Configuring CE-Side Load Balancing for Martini Layer 2 Transport
Local Cross-Connects on page 520
For more information about policies and MPLS layer 2 circuits, see Managing
Policies on the E Series Router, Creating or Modifying Classifier Control Lists for
MPLS Policy Lists, and Creating Policy Lists for MPLS in the JUNOSe Policy
Management Configuration Guide
interface pos
interface serial
mpls policy
mpls-relay
route interface
host1(config)#interface fast 2/0.1
host1(config-subif)#vlan id 1
host1(config-subif)#mpls-relay 10.9.1.3 200001
host1(config-subif)#exit
host1(config)#interface fast 3/0.1
host1(config-subif)#vlan id 1
host1(config-subif)#mpls-relay 10.9.1.3 200001