Korenix JetNet 5228G Series, User Manual

Page: 148 / 658

Configuring the Switch
3-102
3
CLI – This example displays all entries currently in the secure MAC address table.
Access Control Lists
Access Control Lists (ACL) provide packet filtering for IP frames (based on address,
protocol, Layer 4 protocol port number or TCP control code) or any frames (based
on MAC address or Ethernet type). To filter incoming packets, first create an access
list, add the required rules, and then bind the list to a specific port.
Configuring Access Control Lists –
An ACL is a sequential list of permit or deny conditions that apply to IP addresses,
MAC addresses, or other more specific criteria. This switch tests ingress or egress
packets against the conditions in an ACL one by one. A packet will be accepted as
soon as it matches a permit rule, or dropped as soon as it matches a deny rule. If no
rules match for a list of all permit rules, the packet is dropped; and if no rules match
for a list of all deny rules, the packet is accepted.
The following filtering modes are supported:
• Standard IP ACL mode (STD-ACL) filters packets based on the source IP address.
• Extended IP ACL mode (EXT-ACL) filters packets based on source or destination
IP address, as well as protocol type and protocol port number. If the TCP protocol
is specified, packets can also be filtered based on the TCP control code.
• MAC ACL mode (MAC-ACL) filters packets based on the source or destination
MAC address and the Ethernet frame type (RFC 1060).
Command Usage
The following restrictions apply to ACLs:
• The maximum number of ACLs is 1024.
• Each ACL can have up to 100 rules. However, due to resource restrictions, the
average number of rules bound to the ports should not exceed 20.
The order in which active ACLs are checked is as follows:
1. User-defined rules in the Egress IP ACL for egress ports.
2. User-defined rules in the Ingress IP ACL for ingress ports.
3. Explicit default rule (permit any any) in the ingress IP ACL for ingress ports.
4. If no explicit rule is matched, the implicit default is permit all.
Console#show network-access mac-address-table 4-139
---- ----------------- --------------- --------- -------------------------
Port MAC-Address RADIUS-Server Attribute Time
---- ----------------- --------------- --------- -------------------------
1/1 00-00-01-02-03-04 172.155.120.17 Static 00d06h32m50s
1/1 00-00-01-02-03-05 172.155.120.17 Dynamic 00d06h33m20s
1/1 00-00-01-02-03-06 172.155.120.17 Static 00d06h35m10s
1/3 00-00-01-02-03-07 172.155.120.17 Dynamic 00d06h34m20s
Console#