WS5100 Series Switch CLI Reference Guide
16-4
The most common ethertypes are:
• arp
• wisp
• ip
• 802.1q
By default, the switch does not allow layer 2 traffic to pass through the interface. To adopt
an access port through an interface, configure an access control list to allow an ethernet
wisp.
The last ACE in the access list is an implict deny statement.
Whenever the interface receives the packet, its content is checked against all the ACEs in
the ACL. It is allowed/denied based on the ACL configuration.
Example
The MAC AC (in the example below) denies traffic from any source MAC address to a
particular host MAC address:
WS5100(config-ext-macl)#deny any host 00:01:ae:00:22:11
WS5100(config-ext-macl)#
The MAC ACL (in the example below) denies dot1q tagged traffic from VLAN interface 5:
WS5100(config-ext-macl)#deny any any vlan 5 type 8021q
WS5100(config-ext-macl)#
The example below denies traffic between two hosts based on MAC addresses:
WS5100(config-ext-macl)#deny host 01:02:fe:45:76:89 host
01:02:89:78:78:45
WS5100(config-ext-macl)#
NOTE:
A MAC access list entry to allow arp is mandatory to apply an IP
based ACL to an interface. MAC ACL always takes precedence over IP
based ACL’s.
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