Acl Resequencing; Resequencing An Acl Or Prefix List - Dell C9000 Series Networking Configuration Manual

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Dell(conf-router_ospf)#show config

router ospf 34

network 10.2.1.1 255.255.255.255 area 0.0.0.1

distribute-list prefix awe in

Dell(conf-router_ospf)#

ACL Resequencing

ACL resequencing allows you to re-number the rules and remarks in an access or prefix list.

The placement of rules within the list is critical because packets are matched against rules in sequential order.

To order new rules using the current numbering scheme, use resequencing whenever there is no

opportunity.

For example, the following table contains some rules that are numbered in increments of 1. You cannot place

new rules between these packets, so apply resequencing to create numbering space, as shown in the second

table. In the same example, apply resequencing if more than two rules must be placed between rules 7 and

You can resequence IPv4 and IPv6 ACLs, prefixes, and MAC ACLs. No CAM writes happen as a result of

resequencing, so there is no packet loss; the behavior is similar Hot-lock ACLs.

ACL resequencing does not affect the rules, remarks, or order in which they are applied.

Resequencing merely renumbers the rules so that you can place new rules within the list as needed.

Table 7. ACL Resequencing

Rules Before Resequencing:

Rules After Resequencing:

Resequencing is available for IPv4 and IPv6 ACLs, prefix lists, and MAC ACLs.

To resequence an ACL or prefix list, use the following commands. You must specify the list name, starting

number, and increment when using these commands.

IPv4, IPv6, or MAC ACL

seq 5 permit any host 1.1.1.1

seq 6 permit any host 1.1.1.2

seq 7 permit any host 1.1.1.3

seq 10 permit any host 1.1.1.4

seq 5 permit any host 1.1.1.1

seq 10 permit any host 1.1.1.2

seq 15 permit any host 1.1.1.3

seq 20 permit any host 1.1.1.4

Access Control Lists (ACLs)