HP 8000M - Manual (Page 216)

6-140
Configuring the Switch
Class of Service (CoS): Managing Bandwidth More Effectively
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The CoS Device Priority Screen
CoS uses the criteria you specify per IP address (up to 30) to determine traffic
prioritization. Device Priority has higher precedence than any other CoS
prioritization criteria. Thus, if traffic from or to the listed devices also carries
other CoS criteria, those other criteria will be ignored due to the existence of
the Device Priority criteria. (For precedence information, see table 6-7, “Pri-
ority Criteria and Precedence”, on 6-134.)
To display the Device Priority screen, select Device Priority in the CoS Menu
screen (page 6-139).
Figure 6-88. Example of the CoS Device Priority Screen
The Device Priority screen shows examples of CoS device priority configura-
tions. The priorities for IP packets to or from the listed devices will always be
controlled by these criteria. If packets for the listed devices are outbound in
a tagged VLAN environment, then they will carry with them an 802.1p priority
that matches the Priority assignment in this screen.
The CoS Type of Service (ToS) Priority Screen
This feature applies only to IP traffic. CoS reads the Type of Service field in
IP packets received from other devices and prioritizes the packets accord-
ingly, unless the same traffic has already been prioritized by the Device
Priority (IP address) option. For more information on using ToS criteria, refer
to “Using Type of Service (ToS) Criteria to Prioritize IP Traffic” on 6-143.
Packets to or from these IP addresses will always
be placed in the “high” outbound port queue.
Packets to or from these IP addresses will always
be placed in the “normal” outbound port queue.