Administrator Guide

Creating a Prefix List Without a Sequence Number
To create a filter without a specified sequence number, use the following commands.
1. Create a prefix list and assign it a unique name.
CONFIGURATION mode
ip prefix-list prefix-name
2. Create a prefix list filter with a deny or permit action.
CONFIG-NPREFIXL mode
{deny | permit} ip-prefix [ge min-prefix-length] [le max-prefix-length]
The optional parameters are:
• ge min-prefix-length: is the minimum prefix length to be matched (0 to 32).
• le max-prefix-length: is the maximum prefix length to be matched (0 to 32).
Example of Creating a Filter with Dell Networking OS-Assigned Sequence Numbers
The example shows a prefix list in which the sequence numbers were assigned by the software. 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 PREFIX LIST mode
displays the two filters with the sequence numbers 5 and 10.
Dell(conf-nprefixl)#permit 123.23.0.0 /16
Dell(conf-nprefixl)#deny 133.24.56.0 /8
Dell(conf-nprefixl)#show conf
!
ip prefix-list awe
seq 5 permit 123.23.0.0/16
seq 10 deny 133.0.0.0/8
Dell(conf-nprefixl)#
To delete a filter, enter the show config command in PREFIX LIST mode and locate the sequence
number of the filter you want to delete, then use the no seq sequence-number command in PREFIX
LIST mode.
Viewing Prefix Lists
To view all configured prefix lists, use the following commands.
• Show detailed information about configured prefix lists.
EXEC Privilege mode
show ip prefix-list detail [prefix-name]
• Show a table of summarized information about configured Prefix lists.
EXEC Privilege mode
show ip prefix-list summary [prefix-name]
Examples of the show ip prefix-list detail and show ip prefix-list summary Commands
The following example shows the show ip prefix-list detail command.
Dell>show ip prefix detail
Prefix-list with the last deletion/insertion: filter_ospf
Access Control Lists (ACLs)
111