host1(config-if)#mpls policy input hdlc-policy
4. Configure the serial or POS interface and MPLS on the remote PE device.
The interfaces at either end of the HDLC layer 2 circuit can be different types and
have different speeds. For example, you can configure an HDLC layer 2 circuit between
a serial interface on a T1 circuit and a POS interface on an OC3 circuit.
•
Local Cross-Connects for HDLC Layer 2 Services Configuration Differences on page 539
Local Cross-Connects for HDLC Layer 2 Services Configuration Differences
You can also configure an HDLC layer 2 circuit in a local cross-connect configuration
between serial or POS interfaces within the same router.
The procedure is basically the same for configuring an HDLC layer 2 interface between
two PE routers and for a local cross-connect, with the following differences for local
cross-connects:
•
You must use the mpls-relay command instead of the route interface command to
configure a local cross-connect for HDLC layer 2 services.
•
You use the IP address of the local router as the value for the destination IP address
(remote address) in the mpls-relay command.
CE-Side Load Balancing for Martini Layer 2 Transport
This section contains the following subsections:
•
Understanding CE Load Balancing for Martini Layer 2 Transport on page 539
•
Configuration of Many Shim Interfaces with the Same Peer, VC Type, and VC
ID on page 540
•
Example: Configuring Many Shim Interfaces with the Same Peer, VC Type, and VC
ID on page 540
•
Load-Balancing Group Configuration on page 541
•
MPLS Interfaces and Labels on page 542
•
Configuring Load-Balancing Groups on page 542
Understanding CE 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.
539Copyright © 2010, Juniper Networks, Inc.
Chapter 9: Configuring Layer 2 Services over MPLS
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