metrotek ETS-1000, Руководство по эксплуатации

Страница: 26 / 110

26 Analysis. Typical tasks and solutions
5.4.2 Setting up header (advanced)
Figure 5.10. Header (adv) menu
• ID — 12-bit VLAN identifier is a number in the 0–4095 range that
explicitly defines VLAN to which the packet belongs. Zero value of the
VLAN ID means that current frame contains information about priority
only, not about VLAN. If the ID is set to 1, then while transmitting
through the router’s port, the VLAN ID will be automatically set equal
to the VLAN ID of this port.
•
Priority — this field defines the traffic priority. Eight values of priority
([1]) are supported, correspondence between priority and traffic type is
shown in the table 5.1.
Table 5.1. Priorities and types of traffic
Value Description
1 Background
0 (Default) Best Effort
2 Excellent Effort
3 Critical Applications
4 Video
5 Voice
6 Internetwork Control
7 Network Control
Network Control and Internetwork Control traffic types are intended for
network management messages. 4 and 5 priority values can be used for
latency sensitive traffic such as video or speech.
Priority values 3–1 are intended for use with different tasks from stream-
ing applications to FTP traffic that can cope with possible data loss.
ETS-1000. Operations manual