4000 Router Series Layer 2 - WAN Configuration Guide

ManualsBrandsHP ManualsNetwork HardwareHP MSR3024 TAA-compliant AC Router

Enabling session flow control

The L2TP session flow control function adds sequence numbers to transmitted packets, and uses them to

reorder packets arriving out of order and to detect lost packets.

This function takes effect on both sent and received L2TP data messages. The L2TP sessions support this

function if either the LAC or LNS is enabled with this function.

To enable session flow control:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter L2TP group view.

l2tp-group group-number [ mode { lac

| lns } ]

N/A

3. Enable the session flow

control function.

tunnel flow-control

By default, this function is

disabled.

Configuring the DSCP value of L2TP packets

The Differentiated Services Code Point (DSCP) field is the first 6 bits of the IP ToS byte. This field marks the

priority of IP packets for forwarding. This feature sets the DSCP value for the IP packet when L2TP

encapsulates a PPP frame into an IP packet.

To configure the DSCP value of L2TP packets:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter L2TP group view.

l2tp-group group-number [ mode { lac

| lns } ]

N/A

3. Configure the DSCP value

of L2TP packets.

ip dscp dscp-value The default setting is 0.

Configuring the VPN for a tunnel peer

By default, the device transmits L2TP control messages and data messages over the public network. With

this feature, the device transmits them in a specified VPN by searching the routing table in that specified

VPN.

When one L2TP endpoint is in a VPN, you should configure this endpoint to belong to the VPN on the

peer for correct packet forwarding between the two endpoints.

To configure the VPN for a tunnel peer:

Ste

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter L2TP group view.

l2tp-group group-number [ mode { lac

| lns } ]

N/A