3Com WX4400 3CRWX440095A - Manual (Page 332)

332 C HAPTER 16: C ONFIGURING Q UALITY OF S ERVICE
Figure 24 QoS on WX Switches—Classification of Ingress Packets
WX receives packet.
Yes
No (802.1p = 0)
802.1p value
Set packet CoS
1 -> 1
2 -> 2
3 -> 3
4 -> 4
5 -> 5
6 -> 6
7 -> 7
based on 802.1p:
that is not 0?
DSCP value
that is not 0?
Look up CoS for
DSCP value and
8 - 15 -> 1
16 - 23 -> 2
24 - 31 -> 3
32 - 39 -> 4
40 - 47 -> 5
48 - 55 -> 6
56 - 63 -> 7
Yes
No (DCSP = 0)
set packet CoS:
ACE on egress VLAN
or MAP sets CoS?
Yes
No
Set packet CoS
to ACE CoS value.
Use CoS mapped
from DSCP or
802.1p, or leave
CoS unset if 802.1p
and DSCP are both 0.
Mark egress packet.
0 - 7 -> 0