R3102-R3103-HP 6600/HSR6600 Routers Layer 2 - WAN Configuration Guide

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If an HDLC link bundle does not contain any selected member interfaces, the HDLC link bundle interface
is brought down, and cannot forward traffic. It will not be brought up and forward traffic until selected
member interfaces are detected in the HDLC link bundle. The bandwidth of an HDLC link bundle is the
total bandwidth of all selected member interfaces.
Load balancing modes
An HDLC link bundle forwards traffic through its selected member interfaces. When multiple selected
member interfaces exist in an HDLC link bundle, the device chooses some of the selected member
interfaces to forward traffic according to its load balancing mode. Two load balancing modes are
available:
• Per-flow load balancing, where packets of the same flow are forwarded on the same selected
member interface. A flow is identified by an IP quintuple of source IP address, destination IP address,
protocol ID, source port, and destination port.
• Per-packet load balancing, where packets are distributed evenly across all selected member
interfaces in a round-robin way.
Configuring an HDLC link bundle interface
When you configure an HDLC link bundle interface, follow these guidelines:
• The number of selected member interfaces required for bringing up an HDLC link bundle should be
no greater than the limit on the maximum number of selected member interfaces in the HDLC link
bundle.
• To guarantee normal traffic transmission, on the HDLC link bundle interfaces on both ends of an
HDLC link bundle, HP recommends that you configure the same parameters, including the number
of selected member interfaces required for bringing up the HDLC link bundle, limit on the maximum
number of selected member interfaces allowed in the HDLC link bundle, and minimum amount of
bandwidth required for bringing up the HDLC link bundle.
• If the member interfaces in an HDLC link bundle interface are on different cards, HP recommends
that you use the service slot command to specify a card to forward traffic for the HDLC link bundle
interface.
• For HSR6602, 6604, 6608, and 6616 routers, do not specify the MPU to forward traffic for HDLC
link bundle interfaces, because all traffic must be forwarded on base cards.
To configure an HDLC link bundle interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Create an HDLC link bundle interface and
enter its view.
interface hdlc-bundle
bundle-id
N/A
3. Assign an IP address to the HDLC link bundle
interface.
ip address ip-address
{ mask | mask-length }
[ sub ]
By default, no IP address is
assigned to an HDLC link
bundle interface.
For more information about
the ip address command,
see Layer 3—IP Services
Command Reference.