Numbered Standard Ipv4 Acls; Numbered Extended Ipv4 Acls - Cisco Catalyst 2960-XR Security Configuration Manual
Ios release 15.0 2 ex1
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Standard and Extended IPv4 ACLs
Access List Number
500–599
600–699
700–799
800–899
900–999
1000–1099
1100–1199
1200–1299
1300–1999
2000–2699
In addition to numbered standard and extended ACLs, you can also create standard and extended named IP
ACLs by using the supported numbers. That is, the name of a standard IP ACL can be 1 to 99; the name of
an extended IP ACL can be 100 to 199. The advantage of using named ACLs instead of numbered lists is that
you can delete individual entries from a named list.
Numbered Standard IPv4 ACLs
When creating an ACL, remember that, by default, the end of the ACL contains an implicit deny statement
for all packets that it did not find a match for before reaching the end. With standard access lists, if you omit
the mask from an associated IP host address ACL specification, 0.0.0.0 is assumed to be the mask.
The switch always rewrites the order of standard access lists so that entries with host matches and entries
with matches having a don't care mask of 0.0.0.0 are moved to the top of the list, above any entries with
non-zero don't care masks. Therefore, in show command output and in the configuration file, the ACEs do
not necessarily appear in the order in which they were entered.
After creating a numbered standard IPv4 ACL, you can apply it to terminal lines, to interfaces, or to VLANs.
Numbered Extended IPv4 ACLs
Although standard ACLs use only source addresses for matching, you can use extended ACL source and
destination addresses for matching operations and optional protocol type information for finer granularity of
control. When you are creating ACEs in numbered extended access lists, remember that after you create the
ACL, any additions are placed at the end of the list. You cannot reorder the list or selectively add or remove
ACEs from a numbered list.
The switch does not support dynamic or reflexive access lists. It also does not support filtering based on the
type of service (ToS) minimize-monetary-cost bit.
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
114
Type
XNS extended access list
AppleTalk access list
48-bit MAC address access list
IPX standard access list
IPX extended access list
IPX SAP access list
Extended 48-bit MAC address access list
IPX summary address access list
IP standard access list (expanded range)
IP extended access list (expanded range)
Configuring IPv4 ACLs
Supported
No
No
No
No
No
No
No
No
Yes
Yes
OL-29434-01
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