Standard ACL

Use a standard ACL when you need to permit or deny IPv4 traffic based on source address only. Standard ACLs are also useful when you need to quickly control a performance problem by limiting IPv4 traffic from a subnet, group of devices, or a single device. This can block all IPv4 traffic from the configured source, but does not hamper IPv4 traffic from other sources within the network.

A standard ACL uses an alphanumeric ID string or a numeric ID of 1 through 99. Specify a single host, a finite group of hosts, or any host.