Bundle a single T3 interface on a link services IQ interface with MLPPP encapsulation. Binding a single T3 interface to a multilink bundle allows you to configure compressed RTP (CRTP) on the T3 interface.
This scenario applies to MLPPP bundles only. The JUNOS software does not currently support CRTP over Frame Relay. For more information, see Voice Services Configuration Guidelines.
There is no need to configure LFI at DS3 speeds, because the packet serialization delay is negligible.
- [edit interfaces]
- t3-0/0/0 {
-
- unit 0 {
-
- family mlppp {
- bundle lsq-1/3/0.1;
- }
- }
- }
- lsq-1/3/0.1 {
- encapsulation multilink-ppp;
- }
- compression {
-
- rtp {
- # cRTP parameters go here
- #
- port minimum 2000 maximum 64009;
- }
- }
This configuration uses a default fragmentation map, which results in all forwarding classes (queues) being sent out with a multilink header.
To eliminate multilink headers, you can configure a fragmentation map in which all queues have the no-fragmentation statement at the [edit class-of-service fragmentation-maps map-name forwarding-class class-name] hierarchy level, and attach the fragmentation map to the lsq-1/3/0.1 interface, as shown here:
- [edit class-of-service]
- fragmentation-maps {
-
- fragmap {
-
- forwarding-class {
-
- be {
- no-fragmentation;
- }
-
- af {
- no-fragmentation;
- }
-
- ef {
- no-fragmentation;
- }
-
- nc {
- no-fragmentation;
- }
- }
- }
- }
- interfaces {
-
- lsq-1/3/0.1 {
- fragmentation-map fragmap;
- }
- }