Cisco Systems 3750E manual Creating Standard and Extended IPv4 ACLs, Access List Numbers, 34-8

Chapter 34 Configuring Network Security with ACLs

Configuring IPv4 ACLs

Creating Standard and Extended IPv4 ACLs

This section describes IP ACLs. An ACL is a sequential collection of permit and deny conditions. One by one, the switch tests packets against the conditions in an access list. The first match determines whether the switch accepts or rejects the packet. Because the switch stops testing after the first match, the order of the conditions is critical. If no conditions match, the switch denies the packet.

The software supports these types of ACLs or access lists for IPv4:

•Standard IP access lists use source addresses for matching operations.

•Extended IP access lists use source and destination addresses for matching operations and optional protocol-type information for finer granularity of control.

These sections describe access lists and how to create them:

•Access List Numbers, page 34-8

•ACL Logging, page 34-9

•Creating a Numbered Standard ACL, page 34-10

•Creating a Numbered Extended ACL, page 34-11

•Resequencing ACEs in an ACL, page 34-15

•Creating Named Standard and Extended ACLs, page 34-15

•Using Time Ranges with ACLs, page 34-17

•Including Comments in ACLs, page 34-19

Access List Numbers

The number you use to denote your ACL shows the type of access list that you are creating. Table 34-1lists the access-list number and corresponding access list type and shows whether or not they are supported in the switch. The switch supports IPv4 standard and extended access lists, numbers 1 to 199 and 1300 to 2699.

		Table 34-1	Access List Numbers
		Access List Number		Type	Supported
		1–99		IP standard access list	Yes
		100–199		IP extended access list	Yes
		200–299		Protocol type-code access list	No
		300–399		DECnet access list	No
		400–499		XNS standard access list	No
		500–599		XNS extended access list	No
		600–699		AppleTalk access list	No
		700–799		48-bit MAC address access list	No
		800–899		IPX standard access list	No
		900–999		IPX extended access list	No
		1000–1099		IPX SAP access list	No
		1100–1199		Extended 48-bit MAC address access list	No
	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
34-8						OL-9775-02