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Two-layer Port-security experiment

2025-02-28 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Network Security >

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Shulou(Shulou.com)06/01 Report--

Experiment 1: Port-security

1.SW1 and SW2 create VLAN10,R1-R4 partition to VLAN10, and assign IP statically

2. The Fa0/24 shutdown;Fa0/23 between SW is specified as access and divided into VLAN10

3. Enable Port-security in the Fa0/23 interface of SW2, and the specified interface can learn up to 3 MAC addresses. Observe the status of SW2 Fa0/23

4. Three kinds of illegal actions of experimental port-security

5. Three ways of learning mac-address of experimental port-security

6. Set the aging time of the MAC address dynamically learned by port-security to 1min

The experiment is complete, restore the configuration

Configuration of R1

R1 (config) # int f0bin0

R1 (config-if) # ip add 10.10.1.1 255.255.255.0

R1 (config-if) # no sh

R1 (config) # sh int f0bin0

FastEthernet0/0 is up, line protocol is up

Hardware is AmdFE, address is 0002.4b1e.efe0 (bia 0002.4b1e.efe0)

Configuration of R2

R2 (config) # int f0and0

R2 (config-if) # ip add 10.10.1.2 255.255.255.0

R2 (config-if) # no sh

R2 (config) # sh int f0and0

FastEthernet0/0 is up, line protocol is up

Hardware is AmdFE, address is 0013.8046.8e40 (bia 0013.8046.8e40)

Configuration of R3

R3 (config) # int f0Let0

R3 (config-if) # ip add 10.10.1.3 255.255.255.0

R3 (config-if) # no sh

R2 (config) # sh int f0and0

FastEthernet0/0 is up, line protocol is up

Hardware is AmdFE, address is 000c.ce3a.b7e0 (bia 000c.ce3a.b7e0)

Configuration of R4

R4 (config) # int e0Let0

R4 (config-if) # ip add 10.10.1.4 255.255.255.0

R4 (config-if) # no sh

Configuration of SW1

SW1 (config) # vlan 10

SW1 (config) # int range f0amp 1-3

SW1 (config-if) # switchport mode access

SW1 (config-if) # switchport access vlan 10

Configuration of SW2

SW2 (config) # vlan 10

SW2 (config) # int range f0amp 4

SW2 (config-if) # switchport mode access

SW2 (config-if) # switchport access vlan 10

SW2 (config) # interface fastethernet0/23

SW2 (config-if) # switchport mode access

SW2 (config-if) # switchport port-security

SW2 (config-if) # switchport port-security maximum 3

SW2 (config-if) # switchport port-security aging time 1 / / change the aging time 1min

SW2 (config-if) # switchport port-security aging type {absolute | inactivity} / / default aging time 300s

SW2#sh port-security int f0/23

Port Security: Enabled

Port Status: Secure-shutdown

Violation Mode: Shutdown

Aging Time: 1 mins

Aging Type: Absolute

SecureStatic Address Aging: Disabled

Maximum MAC Addresses: 3

Total MAC Addresses: 2

Configured MAC Addresses: 2

Sticky MAC Addresses: 0

Last Source Address:Vlan: 0013.8046.8e40:10

Security Violation Count: 1

SW2 (config-if) # switchport port-security mac-address sticky

SW2 (config-if) # switchport port-security mac-address 0002.4b1e.efe0

SW2 (config-if) # switchport port-security mac-address 0013.8046.8e40

* Mar 1 02 putting Fa0/23 in err-disable state 30 putting Fa0/23 in err-disable state 49 277:% PM-4-ERR_DISABLE: psecure-violation error detected on Fa0/23

SW2#sh int f0/23 status err-disabled

Port Name StatusReason Err-disabled Vlans

Fa0/23 err-disabled psecure-violation

SW2 (config-if) # switchport port-security violation restrict

/ / change the violation to restrict, the interface will not be shut down, log will pop up, and excess frames will be discarded.

SW2 (config-if) # sh

SW2 (config-if) # no sh

* Mar 1 02 caused by MAC address 0002.4b1e.efe0 on port FastEthernet0/23 16 caused by MAC address 0002.4b1e.efe0 on port FastEthernet0/23 28.422:% PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred.

SW2 (config-if) # switchport port-security violation protected

/ / change the violation to protected, the interface will not be shut down, and excess frames will be discarded

SW2 (config-if) # sh

SW2 (config-if) # no sh

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