ADTRAN 1000R Series ppp multilink [fragmentation

Command Reference Guide Demand Interface Configuration Command Set

ppp multilink [fragmentation | interleave]

Use the ppp multilink command to enable multilink PPP (MPPP) operation on an existing PPP interface.

Use the no form of this comma nd to disable.

Syntax Description

fragmentation Enables multilink fragmentation operation.

interleave Enables multilink interleave operation.

Default Values

By default, MPPP is disabled.

Applicable Platforms

This command applies to the NetVanta 1000R, 3000, 4000, and 5000 Series units.

Command History

Release 7.1 Command was introduced.

Release 7.2 Fragmentation and interleave operation were added.

Release 11.1 Command expanded to include the demand interface.

Functional Notes

When enabled, this interface is cap able of the following:

• Combining multiple physical links into one logical link.

• Receiving upper layer protocol data units (PDU), fragmenting and transmitting over the physical links.

• Receiving fragments over the physical links and reassembling them into PDUs.

The fragmentation and interleave options can be used to enhance the multilink operation. Fragment ation is

used to reduce serialization delays of large packets. The fragmentation process evenly divides the dat a

among all links in the bundle with a minimum packet size of 96 bytes. The interleave o peration is used with

streaming protocols to reduce delay by giving pr iority to p acket s identified as high priority. In order delivery

is guaranteed with multilink fragmentation, but is not guaranteed with multilink interleave operation.

The multilink bundle will remain active with a minimum of one physical link. Physical links may be

dynamically added or removed from the multilink bundle with minor interruption to traffic flow.

Usage Examples

The following example enables MPPP:

(config)#interface demand 1

(config-demand 1)#ppp multilink