HP MSR Router Series

100
Configuring HDLC link bundling
This feature is supported only on routers installed with the following interface modules:
• CE3.
• CPOS.
• CT3.
• E1.
• E1-F.
• POS.
• SAE.
• T1.
• T1-F.
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.