To set the port isolation of the PoE switch to enhance security, you need to operate according to the configuration logic of the specific manufacturer and model. The following are general steps and typical configuration methods of different manufacturers, combined with PoE power supply characteristics and security enhancement measures:
1、 Core principles and scenarios
Port isolation prevents illegal device mutual access or broadcast storm by restricting Layer 2 communication between ports in the same VLAN. For example, in the hotel and campus network, the port of the guest room or classroom is isolated and only allowed to access the gateway or server to avoid attacks between users. When the PoE switch is isolated, it is necessary to ensure that the power supply is not affected. For example, H3C S1009-PWR isolates the port through the physical switch while maintaining the PoE power supply function.
2、 General configuration steps
1. Log in to the management interface
Web interface: Access the switch IP (such as 192.168.1.1) and enter the user name/password (admin/admin by default).
CLI interface: input command line commands through SSH/Telnet connection.
2. Create isolation group
Huawei/Xinhua 3: Enter "Security>Port Isolation", create an isolation group (such as group 1), and add the ports to be isolated to this group.
Cisco: Use PVLAN (private VLAN) technology to configure the primary VLAN and isolated VLAN, and assign ports to isolated VLANs.
TP Link: Configure in "Switching>Port Isolation" to specify the communication permissions between ports (such as only allowing access to specific ports).
3. Configure the uplink port
The isolation port is allowed to access the external network through the uplink port (such as the port connected to the router). For example, Huawei switches need to set the uplink port to "hybrid port" or "trunk port", and release isolated VLAN traffic.
4. Verify Configuration
Connectivity test: use the ping command to check whether the isolated ports cannot communicate but can access the uplink devices.
Status view: Confirm that the port has joined the isolation group through the switch management interface or CLI command (such as display port isolate group).
3、 Manufacturer specific configuration example
1. H3C PoE switch (such as S1009-PWR)
Physical switch configuration: Set the "port disconnector" to "ON", and ports 1-8 are isolated from each other, only communicating with the uplink, and PoE power supply is not affected.
Network management configuration:
bash
system-view
Interface Gigabit Ethernet 1/0/1 # Enter the port view
Port isolate enable # Join the isolation group
quit
Display port isolate group 1 # Verification configuration
(Reference)
2. Huawei PoE switch (such as S5720-EI)
Web interface configuration:
Enter "Configuration>Security Service Management>Port Isolation".
Select Bi directional Isolation to add the port to be isolated (such as GE0/0/1-GE0/0/4).
Save the configuration and verify it.
CLI configuration:
bash
system-view
port-isolate group 1
interface GigabitEthernet 0/0/1
port-isolate enable group 1
quit
(Reference)
3. Cisco PoE switch (such as Catalyst 9300)
PVLAN configuration:
bash
Vlan 100 # main VLAN
private-vlan primary
exit
Vlan 101 # isolated VLAN
private-vlan isolated
exit
vlan 100
private-vlan association 101
exit
interface GigabitEthernet 1/0/1
switchport mode private-vlan host
switchport private-vlan host-association 100 101
exit
(Reference)
4. TP Link PoE switch (such as TL-SG2210PEF)
Web interface configuration:
Enter Switching>Port Isolation>Port Isolation Config.
Set "Forward Portlist" for each port, and specify the ports allowed for communication (for example, only server ports are allowed to be accessed).
Save the configuration and test it.
4、 PoE power supply and security enhancement
1. PoE power supply management
Priority setting: In the H3C switch, set a high priority for key equipment (such as cameras) through the poe priority command to avoid being cut off when the power is overloaded.
Power monitoring: use the display poe pse command to view the current power supply status and ensure that the PoE function of the isolation port is normal.
2. Additional safety measures
MAC address binding: bind the port to the device MAC address to prevent illegal access. For example, Huawei switches use the mac address static command.
DHCP Snooping: Enable this function to prevent illegal DHCP server access and ensure the security of IP address allocation.
ACL access control: restrict access to specific ports through ACLs. For example, Huawei switch configuration:
bash
acl number 2000
rule 5 deny source 192.168.1.0 0.0.0.255
interface GigabitEthernet 0/0/1
traffic-filter inbound acl 2000
(Reference)
5、 Verification and maintenance
Connectivity test: use the ping command to check whether the isolated ports cannot communicate but can access the uplink devices (such as the gateway).
Power supply check: confirm the PoE port power supply is normal through the switch management interface or CLI command (such as display poe status).
Firmware update: regularly upgrade the switch firmware to fix security vulnerabilities, such as Cisco upgrading through TFTP or Web interface.
6、 Precautions
The relationship between VLAN and isolation: Port isolation can achieve finer control within the same VLAN without wasting VLAN resources.
Multi vendor hybrid networking: if multi vendor equipment is used, it is necessary to coordinate the configuration (such as Cisco PVLAN and Huawei port isolation) to ensure the overall network security.
Power management: PoE switches have limited power, and priority settings should be combined when configuring isolation to avoid power failure of key equipment.
Through the above steps, the port isolation function of the PoE switch can be effectively configured, and the PoE power supply management and other security measures can be combined to significantly improve network security. Please refer to the equipment manual or manufacturer's support documents for specific operations.