Configuring An Mp-Group; Configuring Ppp Link Efficiency Mechanism - 3Com MSR 50 Series Configuration Manual

376 C 19: PPP
HAPTER AND
Configuring an
MP-group
Configuring PPP Link
Efficiency Mechanism
MP C
ONFIGURATION
To do...
Configure the minimum
number of links in MP bundle
Configure the minimum size
of outgoing MP packet to be
fragmented
n
After you have configured the ppp mp max-bind command or the ppp mp
■
min-bind command, you must shutdown and then undo shutdown all the
relevant physical interfaces before the modification takes effect.
When MP binding is only based on descriptors, users cannot be differentiated.
■
So, to bind users to different groups, use the keyword both in the command.
When MP binding is only based on authentication usernames, peer devices
■
cannot be differentiated. So, authentication username-based MP binding
cannot be used when multiple peer devices exist.
For a VT interface, if a static route is used, you are recommended to specify the
■
next hop rather than the outgoing interface. If the outgoing interface must be
specified, make sure that the physical interfaces bound in the VT are effective
to ensure normal transport of packets.
For detailed description on configuring MP parameters in Dialer interface view,
■
refer to "Configuring MP for DCC" on page
Follow these steps to configure MP via MP-group:
To do...
Enter system view
Create an MP-group
Enter the specified interface
view
Assign the interface to the
specified MP-group
Four mechanisms are available for improving transmission efficiency on PPP links.
They are IP header compression (IPHC), Stac Lempel-Ziv standard (STAC LZS)
compression on PPP packets, V. Jacobson Compressing TCP/IP Headers (VJ TCP
header compression), and link fragmentation and interleaving (LFI).
IP header compression
IPHC is a host-to-host protocol used to support real-time multimedia services such
as voice and video over IP networks. To decrease the bandwidth consumed by
headers, you may enable IP header compression on PPP links to compress RTP
Use the command...
ppp mp min-bind
min-bind-num
ppp mp min-fragment size
168.
Use the command...
system-view
interface mp-group number Required
interface interface-type
interface-number
ppp mp mp-group number
Remarks
Optional
0 by default, which means MP
dialup relies on traffic
detection.
This command is available in
dialer interface view only. The
min-bind-num argument
should be not greater than
max-bind-num
Optional
128 bytes by default
Remarks
-
-
Required