Configuring Port-Based Rate Policing; Configuring Port-Based Rate Shaping - Dell S4048–ON Configuration Manual

NOTE: You cannot configure service-policy input and service-class dynamic dot1p on the same
interface.
• Honor dot1p priorities on ingress traffic.
INTERFACE mode
service-class dynamic dot1p
Example of Configuring an Interface to Honor dot1p Priorities on Ingress Traffic
Dell#configure terminal
Dell(conf)#interface tengigabitethernet 1/1
Dell(conf-if-te-1/1)#service-class dynamic dot1p
Dell(conf-if-te-1/1)#end
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 you configure service-class dynamic dot1p or trust dot1p.
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 you configure service-class dynamic dotp or trust dot1p. When priority-
tagged frames ingress a tagged port, the frames are 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 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.

Configuring Port-Based Rate Policing

If 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 mode
rate police
Example of the rate police Command
The following example shows configuring rate policing.
Dell#configure terminal
Dell(conf)#interface tengigabitethernet 1/1
Dell(conf-if-te-1/1)#rate police 100 40 peak 150 50
Dell(conf-if-te-1/1)#end
Dell#show interfaces tengigabitEthernet 1/2 rate police
Rate police 300 (50) peak 800 (50)
Traffic Monitor 0: normal 300 (50) peak 800 (50)
Out of profile yellow 23386960 red 320605113
Traffic Monitor 1: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 2: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 3: normal NA peak NA
Out of profile yellow 0 red 0
Traffic Monitor 4: normal NA peak NA
Out of profile yellow 0 red 0

Configuring Port-Based Rate Shaping

Rate shaping buffers, rather than drops, traffic exceeding the specified rate until the buffer is exhausted. If any stream exceeds the
configured bandwidth on a continuous basis, it can consume all of the buffer space that is allocated to the port.
680
Quality of Service (QoS)