Technical Documentation

Configure a 32-Bit Checksum


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;


    [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.

Published: 2010-01-29