Users Guide

Conguring a Standard IP ACL Filter
If you are creating a standard ACL with only one or two lters, you can let Dell Networking OS assign a sequence number based on
the order in which the lters are congured. The software assigns lters in multiples of ve.
1. Congure a standard IP ACL and assign it a unique name.
CONFIGURATION mode
ip access-list standard access-list-name
2. Congure a drop or forward IP ACL lter.
CONFIG-STD-NACL mode
{deny | permit} {source [mask] | any | host ip-address} [count [byte] [dscp] [order]
[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 Networking OS assigns the sequence numbers. The lters were assigned sequence numbers based on the order in
which they were congured (for example, the rst lter was given the lowest sequence number). The show config command in
IP ACCESS LIST mode displays the two lters with the sequence numbers 5 and 10.
Example of Viewing a Filter Sequence for a Specied Standard ACL and for an Interface
Dell(config-route-map)#ip access standard kigali
Dell(config-std-nacl)#permit 10.1.0.0/16
Dell(config-std-nacl)#show config
!
ip access-list standard kigali
seq 5 permit 10.1.0.0/16
Dell(config-std-nacl)#
To view all congured IP ACLs, use the show ip accounting access-list command in EXEC Privilege mode.
The following examples shows how to view a standard ACL lter sequence for an interface.
Dell#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
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
seq 55 permit udp 10.15.1.0 /24 10.50.188.118 /31 range 1812 1813
To delete a lter, enter the show config command in IP ACCESS LIST mode and locate the sequence number of the lter you
want to delete. Then use the no seq sequence-number command in IP ACCESS LIST mode.
Congure an Extended IP ACL
Extended IP ACLs lter on source and destination IP addresses, IP host addresses, TCP addresses, TCP host addresses, UDP
addresses, and UDP host addresses.
The trac passes through the lter in the order of the lter’s sequence and hence you can congure the extended IP ACL by rst
entering IP ACCESS LIST mode, and then assigning a sequence number to the lter.
Access Control Lists (ACLs)
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