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Dell Configuration Guide for the S4048–ON System 9.14.2.4

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Configuring a Standard IP ACL Filter

If you are creating a standard ACL with only one or two filters, you can let Dell EMC Networking OS assign a sequence number based on the order in which the filters are configured. The software assigns filters in multiples of five.

  1. Configure a standard IP ACL and assign it a unique name.
    CONFIGURATION mode
    ip access-list standard access-list-name
  2. Configure a drop or forward IP ACL filter.
    CONFIG-STD-NACL mode
    {deny | permit} {source [mask] | any | host ip-address} [count [byte] [dscp] [order] [monitor [session-id]] [fragments]
When you use the log keyword, the CP logs details about the packets that match. Depending on how many packets match the log entry and at what rate, the CP may become busy as it has to log these packets’ details. The following example shows a standard IP ACL in which Dell EMC Networking OS assigns the sequence numbers. The filters were assigned sequence numbers based on the order in which they were configured (for example, the first filter was given the lowest sequence number). The show config command in IP ACCESS LIST mode displays the two filters with the sequence numbers 5 and 10.

Example of Viewing a Filter Sequence for a Specified Standard ACL and for an Interface

DellEMC(config-route-map)#ip access standard acl1
DellEMC(config-std-nacl)#permit 10.1.0.0/16 monitor 177
DellEMC(config-std-nacl)#show config
!
ip access-list standard acl1
  seq 5 permit 10.1.0.0/16 monitor 177
DellEMC(config-std-nacl)#

To view all configured IP ACLs, use the show ip accounting access-list command in EXEC Privilege mode.

The following examples shows how to view a standard ACL filter sequence for an interface.

DellEMC#show ip accounting access example interface gig 4/12
Extended IP access list example
  seq 15 deny udp any any eq 111
  seq 20 deny udp any any eq 2049
  seq 25 deny udp any any eq 31337
  seq 30 deny tcp any any range 12345 12346
  seq 35 permit udp host 10.21.126.225 10.4.5.0 /28 monitor 300
  seq 40 permit udp host 10.21.126.226 10.4.5.0 /28
  seq 45 permit udp 10.8.0.0 /16 10.50.188.118 /31 range 1812 1813
  seq 50 permit tcp 10.8.0.0 /16 10.50.188.118 /31 eq 49 monitor 349
  seq 55 permit udp 10.15.1.0 /24 10.50.188.118 /31 range 1812 1813
To delete a filter, enter the show config command in IP ACCESS LIST mode and locate the sequence number of the filter you want to delete. Then use the no seq sequence-number command in IP ACCESS LIST mode.

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