Command Line Interface
4-104
4
Command Usage
• When you create a new ACL or enter configuration mode for an existing ACL,
use the
permit
or
deny
command to add new rules to the bottom of the list.
To create an ACL, you must add at least one rule to the list.
• To remove a rule, use the
no permit
or
no deny
command followed by the
exact text of a previously configured rule.
• An ACL can contain up to 32 rules.
Example
Related Commands
permit, deny 4-104
ip access-group (4-107)
show ip access-list (4-107)
permit
,
deny
(Standard ACL)
This command adds a rule to a Standard IP ACL. The rule sets a filter condition for
packets emanating from the specified source. Use the
no
form to remove a rule.
Syntax
[
no
]
{
permit | deny
}
{
any
|
source bitmask |
host
source
}
•
any
– Any source IP address.
•
source
– Source IP address.
•
bitmask
– Decimal number representing the address bits to match.
•
host
– Keyword followed by a specific IP address.
Default Setting
None
Command Mode
Standard ACL
Command Usage
• New rules are appended to the end of the list.
• Address bitmasks are similar to a subnet mask, containing four integers from
0 to 255, each separated by a period. The binary mask uses 1 bits to indicate
“match” and 0 bits to indicate “ignore.” The bitmask is bitwise ANDed with the
specified source IP address, and then compared with the address for each IP
packet entering the port(s) to which this ACL has been assigned.
Console(config)#access-list ip standard david
Console(config-std-acl)#
Summary of Contents for 24/48 10/100 Ports + 2GE
Page 2: ......
Page 4: ...ES3526XA ES3552XA F2 2 6 3 E122006 CS R02 149100005500H...
Page 18: ...Contents xiv...
Page 22: ...Tables xviii...
Page 26: ...Figures xxii...
Page 34: ...Introduction 1 8 1...
Page 44: ...Initial Configuration 2 10 2...
Page 242: ...Configuring the Switch 3 198 3...
Page 498: ...Software Specifications A 4 A...
Page 511: ......
Page 512: ...ES3526XA ES3552XA E122006 CS R02D 149100005500H...
