Service Manual

The following example shows how the seq command orders the lters according to the sequence number assigned. In the example,
lter 25 was congured before lter 15, but the show config command displays the lters in the correct order.
Dell(config-std-nacl)#seq 25 deny ip host 10.5.0.0 any log
Dell(config-std-nacl)#seq 15 permit tcp 10.3.0.0 /16 any
Dell(config-std-nacl)#show config
!
ip access-list standard dilling
seq 15 permit tcp 10.3.0.0/16 any
seq 25 deny ip host 10.5.0.0 any log
Dell(config-std-nacl)#
To delete a lter, use the no seq sequence-number command in IP ACCESS LIST mode.
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 5.
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
118
Access Control Lists (ACLs)