Vlan Tagging - Hirschmann RS20 User Manual

Network Load Control
8.4.2

VLAN tagging

The VLAN tag is integrated into the MAC data frame for the VLAN and
Prioritization functions in accordance with the IEEE 802 1Q standard. The
VLAN tag consists of 4 bytes. It is inserted between the source address field
and the type field.
For data packets with a VLAN tag, the device evaluates
the priority information and
the VLAN information if VLANs have been set
up.
Data packets with VLAN tags containing priority information but no VLAN
information (VLAN ID = 0), are known as Priority Tagged Frames.
Priority Traffic class for
entered RS20/RS30/
RS40,
MACH 1000,
MS20/MS30,
OCTOPUS
(default)
0 1
1 0
2 0
3 1
4 2
5 2
6 3
7 3
Table 12: Assignment of the priority entered in the tag to the traffic classes
142
Traffic Class for IEEE 802.1D traffic type
PowerMICE,
MACH 104/
MACH 1040 and
MACH 4000
default setting)
2 Best effort (default)
0 Background
1 Standard
3 Excellent effort (business critical)
4 Controlled load
(streaming multimedia)
5 Video, less than 100 milliseconds of
latency and jitter
6 Voice, less than 10 milliseconds of
latency and jitter
7 Network control reserved traffic
8.4 QoS/Priority
Basic Configuration
Release 6.0 07/2010