HPE FlexNetwork MSR Series Comware 5 Layer 2 - Wan Access Configuration Guide

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Configuring short sequence number header format
negotiation
By default, an MP bundle receives and transmits fragments with long sequence numbers.
• To receive fragments with short sequence numbers, the local end should request the peer to
transmit short sequence numbers during LCP negotiation. After the negotiation succeeds, the
peer transmits fragments with short sequence numbers.
• To transmit fragments with short sequence numbers, the local end should ask the peer to send
a request for receiving short sequence numbers during LCP negotiation. After the negotiation
succeeds, the local end transmits fragments with short sequence numbers.
The sequence number format (long or short) of an MP bundle depends on the configuration of the
first channel joining the MP bundle.
To negotiate the use of short sequence numbers on a dialer MP bundle, configure the command on
the dialer interfaces and the ISDN D channels; to do that on a common MP bundle, use the
command on all its channels. Note that the command will cause PPP re-negotiation.
To configure short sequence number header format negotiation for MP:
Step Command Remarks
1. Enter system view
system-view
N/A
2. Enter interface view.
interface
interface-type
interface-number
N/A
3. Trigger MP short sequence number
header negotiation, specifying that
the interface receive fragments with
short sequence numbers after the
negotiation succeeds.
ppp mp short-sequence
By default, long sequence
number header format
negotiation is performed.
Configuring the MP endpoint descriptor
This section applies only to the interfaces associated with a VT interface for MP bundling.
In the VT interface approach to MP, an MP endpoint bases its link bundling decisions on the remote
endpoint descriptors of links, and assigns the links that receives the same endpoint descriptor to the
same bundle. To avoid incorrect link bundling on a VT interface, make sure the link descriptors used
by different negotiating devices are unique. For example, you must re-configure an endpoint
descriptor if the default endpoint descriptor (device name) cannot uniquely identify the MP bundle at
the remote end for the device.
In the MP-group approach to MP, the negotiating endpoints do not base their bundling decisions on
the endpoint descriptor. The endpoint descriptors of the interfaces in an MP-group are always the
same as the MP-group interface name. The user-configured MP endpoint descriptors cannot take
effect.
By default, if the interface is assigned to an MP group by using the ppp mp mp-group command, the
endpoint descriptor of the interface is the MP group interface name. If the interface is associated with
a VT interface, the endpoint descriptor of the interface is the device name (configured by the
sysname command). If the endpoint descriptor exceeds 20 bytes, the first 20 bytes are taken as the
endpoint descriptor.
To configure the MP endpoint descriptor of an interface for LCP negotiation:
Step Command Remarks
1. Enter system view.
system-view
N/A

HPE FlexNetwork MSR Series Specifications

General

Brand	HPE
Model	FlexNetwork MSR Series
Category	Network Router
Language	English