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Configuring SONET/SDH RFC 2615 Support

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

Table 60: 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

To enable support for the RFC 2615 features, include the rfc-2615 statement at the [edit interfaces interface-name sonet-options] hierarchy level:



[edit interfaces so-fpc/pic/port sonet-options]

rfc-2615;

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