Cisco Systems 3560 Manual De Usuario

Switch(config)# end 

Switch# show access-lists

Standard IP access list 2

    10 deny   171.69.198.102

    20 permit any

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 (see the 

), to interfaces (see the 

), or to VLANs (see the 

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.

Some protocols also have specific parameters and keywords that apply to that protocol. 

These IP protocols are supported (protocol keywords are in parentheses in bold):

Authentication Header Protocol (ahp), Enhanced Interior Gateway Routing Protocol (eigrp), 
Encapsulation Security Payload (esp), generic routing encapsulation (gre), Internet Control Message 
Protocol (icmp), Internet Group Management Protocol (igmp), any Interior Protocol (ip), IP in IP 
tunneling (ipinip), KA9Q NOS-compatible IP over IP tunneling (nos), Open Shortest Path First routing 
(ospf), Payload Compression Protocol (pcp), Protocol Independent Multicast (pim), Transmission 
Control Protocol (tcp), or User Datagram Protocol (udp).

ICMP echo-reply cannot be filtered. All other ICMP codes or types can be filtered.

For more details on the specific keywords for each protocol, see these command references:

These documents are available from the Cisco.com page under Documentation > Cisco IOS Software 
> 12.2 Mainline > Command References.

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.

Supported parameters can be grouped into these categories: TCP, UDP, ICMP, IGMP, or other IP.