Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 127

ip prefix-list juba seq 12 deny 134.23.0.0/16 seq 15 deny 120.0.0.0/8 le 16 seq 20 permit 0.0.0.0/0 le 32 DellEMC(conf-nprefixl)# NOTE: The last line in the prefix list Juba contains a "permit all" statement. By including this line in a prefix list, you specify that all routes not matching any criteria in the prefix list are forwarded. To delete a filter, use the no seq sequence-number command in PREFIX LIST mode.If you are creating a standard prefix list 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 Dell EMC Networking OS assigns filters in multiples of five. 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 EMC 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 two filters with the sequence numbers 5 and 10. DellEMC(conf-nprefixl)#permit 123.23.0.0 /16 DellEMC(conf-nprefixl)#deny 133.24.56.0 /8 DellEMC(conf-nprefixl)#show conf ! ip prefix-list awe seq 5 permit 123.23.0.0/16 seq 10 deny 133.0.0.0/8 DellEMC(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] Access Control Lists (ACLs) 127