Modifying Layer 3 ACL rules

To modify an ACL rule, delete the original rule and replace it with a new rule.

Procedure

To display the rules of all ACLs of a given IP type and standard/extended specification, in global configuration mode enter the show running-config command.
```
device# show running-config ip access-list standard
ip access-list standard a1
 seq 10 permit host 10.1.1.1 count
```
Note the seq number of the rule that you need to delete or modify.
Enter the configure terminal command to access global configuration mode.
```
device# configure terminal
```
Enter the {ip | ipv6} access-list command, specifying the ACL you need to modify.
```
device(config)# ip access-list standard a1
```
Delete the original rule, doing one of the following:
- Enter the no seq command, specifying the sequence number of the rule that you are deleting.
```
device(conf-ipacl-std)# no seq 10
```
- Enter the exact rule that you are deleting, preceded by no.
```
no permit host 10.1.1.1 count
```

Enter the replacement rule.

device(conf-ipacl-std)# seq 10 permit host 10.1.1.1 log