Planex FMG-24K, Руководство пользователя

Страница: 79 / 263

CLI – The following example shows how to assign WRR weights of 1, 4, 16 and
64 to the CoS priority queues 0, 1, 2 and 3.
Console(config)#queue bandwidth 1 4 16 64 3-119
Console(config)#exit
Console#show queue bandwidth
3-122
Queue ID Weight
--------
------
0 1
1 4
2 16
3 64
Console#
Mapping Layer 3/4 Priorities to CoS Values
This switch supports a common method of prioritizing layer 3/4 traffic to meet
application requirements. Traffic priorities can be specified in the IP header of a
frame, using the priority bits in the Type of Service (ToS) octet. The ToS octet
may contain three bits for IP Precedence or six bits for Differentiated Services
Code Point (DSCP) service. When these services are enabled, the priorities are
mapped to a Class of Service value by the switch, and the traffic then sent to the
corresponding output queue.
Because different priority information may be contained in the traffic, this switch
maps priority values to the output queues in the following manner:
> The precedence for priority mapping is IP Precedence or DSCP Priority and
then Default Port Priority.
> IP Precedence and DSCP Priority cannot both be enabled. Enabling one of
these priority types will automatically disable the other.
> IP Precedence and DSCP Priority settings are global and apply to all ports on
the switch.
78