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PowerConnect B-Series FCX Configuration Guide 555
53-1002266-01
Configuring standard named ACLs
16
significant bits) and changes the non-significant portion of the IP address into ones. For example,
if you specify 209.157.22.26/24 or 209.157.22.26 0.0.0.255, then save the changes to the
startup-config file, the value appears as 209.157.22.0/24 (if you have enabled display of subnet
lengths) or 209.157.22.0 0.0.0.255 in the startup-config file.
If you enable the software to display IP subnet masks in CIDR format, the mask is saved in the file
in “/<mask-bits>” format. To enable the software to display the CIDR masks, enter the ip
show-subnet-length command at the global CONFIG level of the CLI. You can use the CIDR format
to configure the ACL entry regardless of whether the software is configured to display the masks in
CIDR format.
NOTE
If you use the CIDR format, the ACL entries appear in this format in the running-config and
startup-config files, but are shown with subnet mask in the display produced by the show ip
access-list command.
The host <source-ip> | <hostname> parameter lets you specify a host IP address or name. When
you use this parameter, you do not need to specify the mask. A mask of all zeros (0.0.0.0) is
implied.
The any parameter configures the policy to match on all host addresses.
The log argument configures the device to generate Syslog entries and SNMP traps for packets that
are denied by the access policy.
NOTE
You can enable logging on ACLs and filters that support logging even when the ACLs and filters are
already in use. To do so, re-enter the ACL or filter command and add the log parameter to the end
of the ACL or filter. The software replaces the ACL or filter command with the new one. The new ACL
or filter, with logging enabled, takes effect immediately.
The in parameter applies the ACL to incoming traffic on the interface to which you apply the ACL.
You can apply the ACL to an Ethernet port or virtual interface.
NOTE
If the ACL is bound to a virtual routing interface, you also can specify a subset of ports within the
VLAN containing that interface when assigning an ACL to the interface.
Configuration example for standard named ACLs
To configure a standard named ACL, enter commands such as the following.
PowerConnect(config)#ip access-list standard Net1
PowerConnect(config-std-nACL)#deny host 209.157.22.26 log
PowerConnect(config-std-nACL)#deny 209.157.29.12 log
PowerConnect(config-std-nACL)#deny host IPHost1 log
PowerConnect(config-std-nACL)#permit any
PowerConnect(config-std-nACL)#exit
PowerConnect(config)#int eth 1/1
PowerConnect(config-if-e1000-1/1)#ip access-group Net1 in