EXFO ETS-1000 - Manual (Page 54)

Configuring and Starting a Test
46 ETS-1000
RFC 2544 General Settings

Precedence: Frame priority field. In accordance with RFC 791 [2] , eight
priority values are available. Sender can specify any priority value from
the table shown below.
Value Description
0 Routine
1 Priority
2 Immediate
3 Flash
4 Flash Override
5 CRITIC/ECP
6 Internetwork Control
7 Network Control