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R0106-HP MSR Router Series Layer 2 - WAN Configuration Guide(V7)

ManualsBrandsHP ManualsNetwork HardwareHP MSR3024 TAA-compliant AC Router
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Configuring HDLC link bundling
In this chapter, "MSR2000" refers to MSR2003. "MSR3000" collectively refers to MSR3012, MSR3024,
MSR3044, MSR3064. "MSR4000" collectively refers to MSR4060 and MSR4080.
This feature is supported only on routers installed with SAE, E1, E1-F, T1, T1-F, POS, CPOS, CE3, or CT3
interface modules.
Overview
HDLC link bundling bundles multiple interfaces using HDLC encapsulation (also known as HDLC
interfaces) together to form one logical link.
HDLC link bundling delivers the following benefits:
• Load balancing—Incoming/outgoing traffic is distributed across multiple HDLC link bundle
member interfaces.
• Increased bandwidth—The bandwidth of the HDLC link bundle interface is the total bandwidth of
all available member interfaces.
• Improved connection reliability—When a member interface goes down, the traffic on it
automatically switches over to other available member interfaces. This avoids service interruption
and improves the connection reliability of the whole HDLC link bundle.
Basic concepts
HDLC link bundle interface
An HDLC link bundle interface is a logical interface comprising a bundle of HDLC links.
HDLC link bundle
An HDLC link bundle is a group of HDLC interfaces. When you create an HDLC link bundle interface, an
HDLC link bundle numbered the same as the HDLC link bundle interface is automatically generated.
Member interface
An interface assigned to an HDLC link bundle is called an HDLC link bundle member interface. Only
POS interface and serial interfaces with HDLC encapsulation enabled can be assigned to an HDLC link
bundle.
After an interface is assigned to an HDLC link bundle:
• It is placed in the down state at the network layer.
• Layer 3 service configurations on the interface do not take effect.
• The interface processes services based on the Layer 3 service configurations of the HDLC link
bundle interface.
States of member interfaces
An HDLC link bundle member interface can be in one of the following states:
• Initial—The member interface is down at the link layer.