Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
13 - 6 © Foundry Networks, Inc. December 22, 2005
Mapping between DSCP value and Forwarding Queue cannot be changed. However, mapping between DSCP
values and the other properties can be changed as follows:
• DSCP to Internal Forwarding Priority Mapping – You can change the mapping between the DSCP value
and the Internal Forwarding priority value from the default values shown in Table 13.2 through Table 13.5.
This mapping is used for COS marking and determining the internal priority when the trust level is DSCP. See
“Changing the DSCP –> Internal Forwarding Priority Mappings” on page 13-10.
• Internal Forwarding Priority to Forwarding Queue – You can reassign an internal forwarding priority to a
different hardware forwarding queue. See “Changing the Internal Forwarding Priority –> Hardware
Forwarding Queue Mappings” on page 13-10.
QoS Queues
Foundry devices support the eight QoS queues (qosp0 – qosp7) listed in Table 13.6.
The queue names listed above are the default names. If desired, you can rename the queues as instructed in
“Renaming the Queues” on page 13-12.
Packets are classified and assigned to specific queues based on the criteria shown in Figure 13.1.
Table 13.5: Default QoS Mappings, Columns 48 to 63
DSCP value
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
802.1p
(COS) Value
6666666677777777
DSCP value 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
Internal
Forwarding
Priority
6666666677777777
Forwarding
Queue
6666666677777777
Table 13.6: QoS Queues
QoS Priority Level QoS Queue
0 qosp0 (lowest priority
queue)
1 qosp1
2 qosp2
3 qosp3
4 qosp4
5 qosp5
6 qosp6
7 qosp7 (highest priority
queue)

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English