Application Note

AL; Reviewed:

SPOC 8/16/2006

Solution & Interoperability Test Lab Application Notes

19 of 21

JNPR-cRTP-PPP.doc

Step Description

Priority low

PLP high: 1, PLP low: 1, PLP medium-high: 1, PLP medium-low: 1

Entry 1 (Scheduler index: 62197, Queue #: 1):

Tx rate: 0 Kb (80%), Buffer size: 80 percent

Priority high

PLP high: 1, PLP low: 1, PLP medium-high: 1, PLP medium-low: 1

Entry 2 (Scheduler index: 62165, Queue #: 2):

Tx rate: 0 Kb (5%), Buffer size: 5 percent

Priority high

PLP high: 1, PLP low: 1, PLP medium-high: 1, PLP medium-low: 1

Entry 3 (Scheduler index: 45740, Queue #: 3):

Tx rate: 0 Kb (5%), Buffer size: 5 percent

Priority high

PLP high: 1, PLP low: 1, PLP medium-high: 1, PLP medium-low: 1

RED drop profile index: 1, # entries: 1

Drop

Entry Fullness(%) Probability(%)

0 100 100

7. Conclusion

These Application Notes have described the administration steps required to configure cRTP to

function between Juniper Networks M7i and J4300 routers over a Point-to-Point Protocol

connection. Quality of Service was implemented through the use of DSCP information for traffic

priority queue assignment and the use of bandwidth allocation on all the interfaces. There was no

detectable difference in voice quality between VoIP traffic that has been through header

compression to traffic that has not been through header compression. Basic features such as

Transfer, Conference, and DTMF detection continue to function over a cRTP environment.