Netgear GS752TPSB GS7xxTS-TPS Software Admin Manual - Page 308

Access Control Lists (ACLs), In the Port PVID Configuration screen see

Page 308 highlights

GS728TS, GS728TPS, GS752TS, and GS752TPS Gigabit Smart Switches 2. In the VLAN Membership screen (see VLAN Membership Configuration on page 112) specify the VLAN membership as follows: • For the default VLAN with VLAN ID 1, specify the following members: port 7 (U) and port 8 (U). • For the VLAN with VLAN ID 10, specify the following members: port 1 (U), port 2 (U), and port 3 (T). • For the VLAN with VLAN ID 20, specify the following members: port 4 (U), port 5 (T), and port 6 (U). 3. In the Port PVID Configuration screen (see Port VLAN ID Configuration on page 113), specify the PVID for ports 1 and 4 so that packets entering these ports are tagged with the port VLAN ID: • Port 1: PVID 10 • Port 4: PVID 20 4. With the VLAN configuration that you set up, the following situations produce results as described: • If an untagged packet enters port 1, the switch tags it with VLAN ID 10. The packet has access to port 2 and port 3. The outgoing packet is stripped of its tag to leave port 2 as an untagged packet. For port 3, the outgoing packet leaves as a tagged packet with VLAN ID 10. • If a tagged packet with VLAN ID 10 enters port 3, the packet has access to port 1 and port 2. If the packet leaves port 1 or port 2, it is stripped of its tag to leave the switch as an untagged packet. • If an untagged packet enters port 4, the switch tags it with VLAN ID 20. The packet has access to port 5 and port 6. The outgoing packet is stripped of its tag to become an untagged packet as it leaves port 6. For port 5, the outgoing packet leaves as a tagged packet with VLAN ID 20. Access Control Lists (ACLs) ACLs ensure that only authorized users have access to specific resources while blocking off any unwarranted attempts to reach network resources. ACLs are used to provide traffic flow control, restrict contents of routing updates, decide which types of traffic are forwarded or blocked, and provide security for the network. ACLs are normally used in firewall routers that are positioned between the internal network and an external network, such as the Internet. They can also be used on a router positioned between two parts of the network to control the traffic entering or exiting a specific part of the internal network. The added packet processing required by the ACL feature does not affect switch performance. That is, ACL processing occurs at wire speed. Access lists are a sequential collection of permit and deny conditions. This collection of conditions, known as the filtering criteria, is applied to each packet that is processed by the switch or the router. The forwarding or dropping of a packet is based on whether or not the packet matches the specified criteria. 308

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GS728TS, GS728TPS, GS752TS, and GS752TPS Gigabit Smart Switches
2.
In the VLAN Membership screen (see
VLAN Membership Configuration
on page
112)
specify the VLAN membership as follows:
For the default VLAN with VLAN ID 1, specify the following members: port 7 (U) and
port 8 (U).
For the VLAN with VLAN ID 10, specify the following members: port 1 (U), port 2 (U),
and port 3 (T).
For the VLAN with VLAN ID 20, specify the following members: port 4 (U), port 5 (T),
and port 6 (U).
3.
In the Port PVID Configuration screen (see
Port VLAN ID Configuration
on page
113),
specify the PVID for ports 1 and 4 so that packets entering these ports are tagged with the
port VLAN ID:
Port 1: PVID 10
Port 4: PVID 20
4.
With the VLAN configuration that you set up, the following situations produce results as
described:
If an untagged packet enters port 1, the switch tags it with VLAN ID 10. The packet
has access to port 2 and port 3. The outgoing packet is stripped of its tag to leave port
2 as an untagged packet. For port 3, the outgoing packet leaves as a tagged packet
with VLAN ID 10.
If a tagged packet with VLAN ID 10 enters port 3, the packet has access to port 1 and
port 2. If the packet leaves port 1 or port 2, it is stripped of its tag to leave the switch
as an untagged packet.
If an untagged packet enters port 4, the switch tags it with VLAN ID 20. The packet
has access to port 5 and port 6. The outgoing packet is stripped of its tag to become
an untagged packet as it leaves port 6. For port 5, the outgoing packet leaves as a
tagged packet with VLAN ID 20.
Access Control Lists (ACLs)
ACLs ensure that only authorized users have access to specific resources while blocking off
any unwarranted attempts to reach network resources.
ACLs are used to provide traffic flow control, restrict contents of routing updates, decide
which types of traffic are forwarded or blocked, and provide security for the network. ACLs
are normally used in firewall routers that are positioned between the internal network and an
external network, such as the Internet. They can also be used on a router positioned between
two parts of the network to control the traffic entering or exiting a specific part of the internal
network. The added packet processing required by the ACL feature does not affect switch
performance. That is, ACL processing occurs at wire speed.
Access lists are a sequential collection of permit and deny conditions. This collection of
conditions, known as the filtering criteria, is applied to each packet that is processed by the
switch or the router. The forwarding or dropping of a packet is based on whether or not the
packet matches the specified criteria.