SMGM FUNCTIONS
86
9.2
Data prioritizing
Depending on the application, it is necessary to prioritize certain data for transmission. The SMGM/X system
has five queues for this purpose (en.: Queues):
The data packet priority assignment can be based on the following features:
ITEM
Queue
Priority
1.
RT ... Real-Time
1- Highest priority
2.
VO ... Voice
2
3.
VI ... Video
3
4.
BE ... Best Effort
4
5.
BK ... Background
5- Lowest priority
ITEM
Layer
Description
1.
2
Ether-Type
2.
2
PCP bits from the TCI field of the VLAN tag (= L2 priori-
ty)
3.
2
Frame ID of a PN-IO frame
4.
3
IP precedence bits from the TOS field of an IP packet
5.
3
IP-Port