Honor Dot1P Priorities On Ingress Traffic - Dell Force10 C150 Configuration Manual

Honor dot1p Priorities on Ingress Traffic

By default FTOS does not honor dot1p priorities on ingress traffic. Use the command
dynamic dot1p
from INTERFACE mode to honor dot1p priorities on ingress traffic, as shown in
Figure 41-3. You can configure this feature on physical interfaces and port-channels, but you cannot
configure it on individual interfaces in a port channel.
On the C-Series and S-Series you can configure
mode, which applies the configuration to all interfaces. A CONFIGURATION mode
dot1p
entry supersedes any INTERFACE entries. See
page 867.
Note: You cannot configure
Figure 41-3. service-class dynamic dot1p Command Example
FTOS#config t
FTOS(conf)#interface gigabitethernet 1/0
FTOS(conf-if)#service-class dynamic dot1p
FTOS(conf-if)#end
FTOS#
Priority-tagged Frames on the Default VLAN
Priority-tagged Frames on the Default VLAN
Priority-tagged frames are 802.1Q tagged frames with VLAN ID 0. For VLAN classification these packets
are treated as untagged. However, the dot1p value is still honored when
trust dot1p
is configured.
When priority-tagged frames ingress an untagged port or hybrid port the frames are classified to the default
VLAN of the port, and to a queue according to their dot1p priority if
dot1p
are configured. When priority-tagged frames ingress a tagged port, the frames are dropped because
for a tagged port the default VLAN is 0.
FTOS Behavior: Hybrid ports can receive untagged, tagged, and priority tagged frames. The rate
metering calculation might be inaccurate for untagged ports, since an internal assumption is made that
all frames are treated as tagged. Internally the ASIC adds a 4-bytes tag to received untagged frames.
Though these 4-bytes are not part of the untagged frame received on the wire, they are included in the
rate metering calculation resulting in metering inaccuracy.
service-class dynamic dot1p
and
service-policy input
is available only on platforms:
Mapping dot1p values to service queues on
service-class dynamic dot1p
service-class dynamic dot1p
service-class dynamic dotp
service-class
from CONFIGURATION
service-class dynamic
on the same interface.
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trust
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