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Spirent TestCenter: Where to set the EXP bits in LDP bound streams?

  • Spirent TestCenter
    • MPLS EXP bits
    • Bound Streams
  • When creating the stream, before you click the Add button at the "select source and destination" window you need to check Show All Headers.
    • Basically the MPLS EXP bits is set by setting the IP Header TOS/Diffserv values. See attached document.
  • The higher order 3 bits of the IP TOS are copied to the EXP bits, irrespective of the manual changes in EXP
  • However with the use of modifiers in the stream configuration, we can achieve EXP value different from TOS value.
    • Add a modifier for DSCP and EXP fields.

Product : Routing,Windows GUI