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Command Line Interface
4-202
4
Related Commands
permit, deny 4-202
ip access-group (4-205)
show ip access-list (4-205)
,
(Standard
IPv4
ACL)
This command adds a rule to a Standard IPv4 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 IPv4 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.
Example
This example configures one permit rule for the specific address 10.1.1.21 and
another rule for the address range 168.92.16.x – 168.92.31.x using a bitmask.
Related Commands
access-list ip (4-201)
Console(config-std-acl)#permit host 10.1.1.21
Console(config-std-acl)#permit 168.92.16.0 255.255.240.0
Summary of Contents for 6152PL2 FICHE
Page 2: ......
Page 6: ...vi ...
Page 8: ...viii ...
Page 32: ...Tables xxxii ...
Page 38: ...Figures xxxviii ...
Page 56: ...Initial Configuration 2 10 2 ...
Page 378: ...Configuring the Switch 3 322 3 ...
Page 817: ......