Administrator Guide
To apply a Layer 2 policy on Layer 3 interfaces, perform the following:
1. Congure an interface with an IP address or a VLAN subinterface
CONFIGURATION mode
Dell(conf)# int fo 0/0
INTERFACE mode
Dell(conf-if-fo-0/0)# ip address 90.1.1.1/16
2. Congure the Layer 2 policy with Layer 2 (Dot1p or source MAC-based) classication rules.
CONFIGURATION mode
Dell(conf)# policy-map-input l2p layer2
3. Apply the Layer 2 policy on the Layer 3 interface.
INTERFACE mode
Dell(conf-if-fo-0/0)# service-policy input l2p layer2
Classifying Packets Based on a Combination of DSCP Code Points and VLAN IDs
You can congure a classier map, which contains both the Dierentiated Services Code Point (DSCP) and MAC VLAN IDs as
parameters, for ltering packets that are received before they are forwarded or dropped. You can now specify both DSCP-IP packet
classication (Layer 3 headers) and Dot1p—(IEEE 802.1p) Packet classication (Layer 2 headers) as match criteria in a Layer 3 class
map.
The type of the class map is determined during the creation of a class map. In releases of Dell Networking OS earlier than Release
9.2(0.0), you can congure only the dot1p value as the lter criterion in Layer 2 class maps and the DSCP value as the lter
parameter in Layer 3 class maps. It was also possible to classify packets using both the Layer 2 attribute, dot1p value or MAC VLAN,
in a Layer 2 class map and the Layer 3 attribute, DSCP value, in a Layer 3 class map. However, it was not possible to congure both
dot1p or MAC VLAN, and DSCP values in the same Layer 2 or Layer 3 class map.
All class maps are Layer 3 by default. You can now congure a Layer 3 class map to dierentiate trac according to the IP VLAN
value and the DSCP value. You can use the match ip vlan vlan-id command in Class Map Input Conguration mode to
specify a match criterion for a class map based on a VLAN ID. You can attach this class map with a policy map, and associate the
policy map with a service queue. When you link class maps to queues using the service-queue command, Dell Networking OS
matches the class-maps according to queue priority (queue numbers closer to 0 have lower priorities).
To create IP VLAN and DSCP values as match criteria in a Layer 3 class map, and to associate the class map with a policy map that
is linked to a service queue, perform the following:
1. Create a match-any or a match-all Layer 3 class map, depending on whether you want the packets to meet all or any of the
match criteria to be a member of the class. By default, a Layer 3 class map is created if you do not enter the layer2 option with
the class-map command. When you create a class map, you enter the Class Map conguration mode.
CONFIGURATION mode
Dell (conf)#class-map match-all pp_classmap
2. Use a DSCP value as a match criterion.
CLASS-MAP mode
Dell (conf-class-map)#match ip dscp 5
3. Congure a match criterion for a class map based on the VLAN ID.
CLASS-MAP mode
Dell (conf-class-map)#match ip vlan 5
4. Create a QoS input policy on the device.
Quality of Service (QoS)
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