Administrator Guide

ACLs acl1 and acl2 have overlapping rules because the address range 20.1.1.0/24 is within 20.0.0.0/8. Therefore (without the keyword
order), packets within the range 20.1.1.0/24 match positive against cmap1 and are buffered in queue 7, though you intended for these
packets to match positive against cmap2 and be buffered in queue 4.
In cases where class-maps with overlapping ACL rules are applied to different queues, use the order keyword to specify the order in
which you want to apply ACL rules. The order can range from 0 to 254. Dell EMC Networking OS writes to the CAM ACL rules with
lower-order numbers (order numbers closer to 0) before rules with higher-order numbers so that packets are matched as you intended.
By default, all ACL rules have an order of
255.
Example of the order Keyword to Determine ACL Sequence
DellEMC(conf)#ip access-list standard acl1
DellEMC(config-std-nacl)#permit 20.0.0.0/8
DellEMC(config-std-nacl)#exit
DellEMC(conf)#ip access-list standard acl2
DellEMC(config-std-nacl)#permit 20.1.1.0/24 order 0
DellEMC(config-std-nacl)#exit
DellEMC(conf)#class-map match-all cmap1
DellEMC(conf-class-map)#match ip access-group acl1
DellEMC(conf-class-map)#exit
DellEMC(conf)#class-map match-all cmap2
DellEMC(conf-class-map)#match ip access-group acl2
DellEMC(conf-class-map)#exit
DellEMC(conf)#policy-map-input pmap
DellEMC(conf-policy-map-in)#service-queue 7 class-map cmap1
DellEMC(conf-policy-map-in)#service-queue 4 class-map cmap2
DellEMC(conf-policy-map-in)#exit
DellEMC(conf)#interface te 10/1/1
DellEMC(conf-if-te-10/1/1)#service-policy input pmap
Configure ACL Range Profiles
Dell EMC Networking OS allows L3 ACLs to configure range of L4 source and destination ports using the operators and range of ports.
This results in multiple ACL entries that use more space in the forwarding table. Staring from Dell EMC Networking OS 9.11(0.0), you can
configure the range of L4 source and destination ports as part of L3 ACLs, which results in only one ACL entry. To configure the range
profiles, use the following commands.
For a complete list of all the commands related to IP ACLs, refer to the Dell EMC Networking OS Command Line Interface Reference
Guide.
1. Enable the ACL range feature.
CONFIGURATION mode
feature aclrange
NOTE:
If you enable this feature, router traffic is not filtered by the ACL.
2. Create a range profile after entering the ACL Profile Configuration mode.
CONFIGURATION mode
aclrange profile-name
CONFIGURATION ACL RANGE mode
type [inverse value] lower threshold upper-threshold
DellEMC(conf)#feature aclrange
DellEMC(conf)#aclrange sportrange1
DellEMC(conf-aclrange-sportrange1)# l4srcport 1024 65535
DellEMC(conf)#aclrange destportrange1
DellEMC(conf-acl-destportrange1)# l4dstport 500 500
DellEMC(conf)#aclrange inverserange
DellEMC(conf-acl-inverserange)# l4dstport inverse 1000
DellEMC# show aclrange
INDEX PROFILE_NAME TYPE INVERSE LOWER UPPER REF_CNT
94
Access Control Lists (ACLs)