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

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• If the local end wants to receive fragments with short sequence numbers, it should request the peer
to transmit short sequence numbers during LCP negotiation. After the negotiation succeeds, the
peer transmits fragments with short sequence numbers.
• If the local end wants to transmit fragments with short sequence numbers, it 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:
Ste
p
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 format 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
The MP endpoint descriptor is negotiated during LCP negotiation for MP bundling.
By default, the endpoint descriptor of an interface is the device name. 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 endpoint descriptor exceeds 20 bytes, only the first 20 bytes are taken.
You can also configure the endpoint descriptor by performing the following task.
To configure the MP endpoint descriptor of an interface for LCP negotiation:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the MP endpoint
descriptor.
ppp mp endpoint string char-string Optional.
Configuring LFI
Link Fragmentation and Interleaving (LFI) is a mechanism for improving transmission efficiency on PPP
links.