6-45
Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Types To Configure QoS for Outbound Traffic
Table 6-10. ToS IP-Precedence Bit Mappings to 802.1p Priorities
IP Packet Sent Out
an Untagged Port
in a VLAN
Same as above, plus the IP Prece-
dence value (0 - 7) will be used to
set a corresponding 802.1p priority
in the VLAN tag carried by the
packet to the next downstream
device. Refer to table 6-10, below.
Same as above, plus the Priority value (0 - 7) will be used to set
a corresponding 802.1p priority in the VLAN tag carried by the
packet to the next downstream device. Where No-override is the
assigned priority, the VLAN tag carries a “0” (normal priority)
802.1p setting if not prioritized by other QoS types.
Outbound Port ToS Option:
IP Precedence
(Value = 0 - 7)
Differentiated Services
ToS Byte IP
Precedence Bits
Corresponding
802.1p Priority
Service Priority Level
000 1 Lowest
001 2 Low
002 0 Normal
003 3
004 4
005 5
006 6
007 7 Highest
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