Example of Configuring an Interface to Honor dot1p Priorities on Ingress TrafficDell#configure terminalDell(conf)#interface tengigabitethernet 1/1/1Dell(conf-if-te-1/1/1)#service-class dynamic dot1pDell(conf-if-te-1/1/1)#endPriority-Tagged Frames on the Default VLANPriority-tagged frames are 802.1Q tagged frames with VLAN ID 0. For VLAN classification, these packetsare treated as untagged. However, the dot1p value is still honored when you configure service-classdynamic dot1p or trust dot1p.When priority-tagged frames ingress an untagged port or hybrid port, the frames are classified to thedefault VLAN of the port and to a queue according to their dot1p priority if you configure service-class dynamic dotp or trust dot1p. When priority-tagged frames ingress a tagged port, the framesare dropped because, for a tagged port, the default VLAN is 0.Dell Networking OS Behavior: Hybrid ports can receive untagged, tagged, and priority tagged frames.The rate metering calculation might be inaccurate for untagged ports because an internal assumption ismade that all frames are treated as tagged. Internally, the ASIC adds a 4-bytes tag to received untaggedframes. Though these 4-bytes are not part of the untagged frame received on the wire, they are includedin the rate metering calculation resulting in metering inaccuracy.Configuring Port-Based Rate PolicingIf the interface is a member of a VLAN, you may specify the VLAN for which ingress packets are policed.• Rate policing ingress traffic on an interface.INTERFACE moderate policeExample of the rate police CommandThe following example shows configuring rate policing.Dell#configure terminalDell(conf)#interface tengigabitethernet 1/1/1Dell(conf-if-te-1/1/1)#rate police 100 40 peak 150 50Dell(conf-if-te-1/1/1)#endDell#show interfaces tengigabitEthernet 1/2 rate policeRate police 300 (50) peak 800 (50)Traffic Monitor 0: normal 300 (50) peak 800 (50)Out of profile yellow 23386960 red 320605113Traffic Monitor 1: normal NA peak NAOut of profile yellow 0 red 0Traffic Monitor 2: normal NA peak NAOut of profile yellow 0 red 0Traffic Monitor 3: normal NA peak NAOut of profile yellow 0 red 0Traffic Monitor 4: normal NA peak NAOut of profile yellow 0 red 0Dell#show interfaces tengigabitEthernet 1/2/1 rate policeRate police 300 (50) peak 800 (50)Traffic Monitor 0: normal 300 (50) peak 800 (50)Out of profile yellow 23386960 red 320605113Traffic Monitor 1: normal NA peak NAOut of profile yellow 0 red 0708 Quality of Service (QoS)
