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Action

To explicitly configure the 32-bit checksum, follow these steps:

1. In configuration mode, go to the following hierarchy level:
   [edit]user@host# edit interfaces so-fpc/pic/port sonet-options
2. Configure the 32-bit checksum:
   [edit interfaces so-fpc/pic/port sonet-options]user@host# set (fcs 32 | rfc-2615)

   Note: The rfc-2615 statement automatically configures the interface to use FCS 32 and changes the C2 byte to 0x16, as per the RFC.

3. Verify the configuration:
   user@host# show

   For example:

   [edit interfaces so-0/0/0 sonet-options]user@host# show fcs 32;

   or

   [edit interfaces so-0/0/0 sonet-options]user@host# show rfc-2615;

1. Commit the configuration:
   user@host# commit

   Note: On a Channelized OC12 interface, the sonet-options fcs statement is not supported. To configure FCS on each DS3 channel, you must include the t3-options fcs statement in the configuration for each channel.