Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 

PPP Support on SONET/SDH Interfaces

 

RFC 2615, PPP over SONET/SDH, requires certain C2 header byte and FCS settings that vary from the default values configured in accordance with RFC 1619 (the previous version of RFC 2615). The newer values are optimized for stronger error detection, especially when combined with payload scrambling at higher bit rate links.

Table 1 shows the older (RFC 1619) and newer (RFC 2615) values, together with the Juniper Networks default values.

Table 1: SONET/SDH Default Settings

Value

RFC 1619

Default

RFC 2615

SONET/SDH C2 header byte

0XCF

0XCF

0X16

Frame checksum (bit)

16

16

32

Payload scrambling

n/a

Enabled

Enabled