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Quality of Service: Managing Bandwidth More Effectively
Globally-Configured QoS
Assigning a Priority for a Global IP-Device Classifier
This global QoS packet-marking option assigns an 802.1p priority to all IP
packets that have the specified IP address as either a source or destination. If
both the source and destination addresses match, the priority configured for
the IP destination address has precedence.
IPv4 Syntax: qos device-priority < ipv4-address | [ipv4] ipv4-address/mask-length >
priority < 0 - 7 >
IPv6 Syntax: qos device-priority < ipv6-address | ipv6 ipv6-address/prefix-length >>
priority < 0 - 7 >
Marks an 802.1p priority in outbound packets with the
specified IP address or subnet mask in the source or desti-
nation field in a packet header, where:
• ipv4-address or ipv6-address is an IPv4 or IPv6 address used
to match the source or
destination address in packet
headers.
Note: An IPv6 local-link address (such as
fe80::110:252%vlan20) that is automatically generated on
a VLAN interface is not supported as an ipv6-address value.
• [ipv4] ipv4-address/mask-length is the subnet identified by
the IPv4 mask for the specified address that is used to
match the IPv4 in the source or
destination field of packet
headers.
• ipv6 ipv6-address/prefix-length is the subnet identified by the
IPv6 prefix-length for the specified address that is used to
match the IPv6 address in the source or
destination field
of packet headers.
Enter the IPv4 mask or IPv6 prefix length with an address
in CIDR format by using the number of significant bits
(for example, 2001:db8::1:262:a03:e102:127/64 or
10.28.31.1/24).
• priority <0-7> marks the specified 802.1p priority in
matching IP packets.
The 802.1p priority determines the packet’s queue in the
outbound port on the switch. If the packet leaves the switch
on a tagged VLAN port, it carries the 802.1p priority with it
to the next downstream device.
The no form of the command deletes the specified IP address
or subnet mask as a QoS classifier, and resets the priority
for the VLAN to
No-override.
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