Reference Guide

CONFIG-STD-NACL mode
{deny | permit} {source [mask] | any | host ip-address} [count [byte]] [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 the system 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.
The following example shows viewing a filter sequence for a specified standard ACL.
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 seq 10 deny tcp any any eq 111
Dell(config-std-nacl)#
To view all configured IP ACLs, use the show ip accounting access-list command in EXEC Privilege mode.
Dell#show ip accounting access example interface gig 4/12
Extended IP access list example
seq 10 deny tcp any any eq 111
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 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.
Configure an Extended IP ACL
Extended IP ACLs filter on source and destination IP addresses, IP host addresses, TCP addresses, TCP host addresses, UDP
addresses, and UDP host addresses.
Because traffic passes through the filter in the order of the filter’s sequence, you can configure the extended IP ACL by first
entering IP ACCESS LIST mode and then assigning a sequence number to the filter.
Configuring Filters with a Sequence Number
To configure filters with a sequence number, use the following commands.
1. Enter IP ACCESS LIST mode by creating an extended IP ACL.
CONFIGURATION mode
ip access-list extended access-list-name
2. Configure a drop or forward filter.
CONFIG-EXT-NACL mode
seq sequence-number {deny | permit} {ip-protocol-number | icmp | ip | tcp | udp} {source
mask | any | host ip-address} {destination mask | any | host ip-address} [operator port
[port]] [count [byte]] [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.
Access Control Lists (ACLs)
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