Reference Guide

seq 20 deny 10.4.0.0 /16
seq 25 deny 10.5.0.0 /16
seq 30 deny 10.6.0.0 /16
seq 35 deny 10.7.0.0 /16
seq 40 deny 10.8.0.0 /16
seq 45 deny 10.9.0.0 /16
seq 50 deny 10.10.0.0 /16
DellEMC#
The following example shows how the seq command orders the filters according to the sequence number assigned. In the
example, filter 25 was configured before filter 15, but the show config command displays the filters in the correct order.
DellEMC(config-std-nacl)#seq 25 deny ip host 10.5.0.0 any log
DellEMC(config-std-nacl)#seq 15 permit tcp 10.3.0.0 /16 any monitor 300
DellEMC(config-std-nacl)#show config
!
ip access-list standard dilling
seq 15 permit tcp 10.3.0.0/16 any monitor 300
seq 25 deny ip host 10.5.0.0 any log
DellEMC(config-std-nacl)#
To delete a filter, use the no seq sequence-number command in IP ACCESS LIST mode. 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 5.
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.
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
Access Control Lists (ACLs)
117