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Duplicate IP Error log

mauleshg1
Level 1
Level 1

Please help me as early ass possible

Hi i have Small business switch and i have cisco 3850 layer switch my small business switch connect to 3850 switch on fiber port and i am getting below log.

I am getting log in both small business switch 

in each switch it is showing mac address of layer 3 switch fiber port mac address

Switch one log 

1.Duplicate IP address 192.168.100.18 from MAC 34:db:fd:a0:92:99 was detected on VLAN 1, port gi27, aggregated (4)

2. DUPLICATE: Duplicate IP address 192.168.100.18 from MAC 34:db:fd:a0:92:99 was detected on VLAN 1, port gi27, aggregated (3)

3. Duplicate IP address 192.168.100.18 from MAC 34:db:fd:a0:92:99 was detected on VLAN 1, port gi27

4. Duplicate IP address 192.168.100.18 from MAC 34:db:fd:a0:92:99 was detected on VLAN 1, port gi27, aggregated (6)

 This mac address is layer 3 fiber port mac address - 34:db:fd:a0:92:99

Switch two log

1. Duplicate IP address 192.168.100.19 from MAC 34:db:fd:a0:92:9a was detected on VLAN 1, port gi27

2. DUPLICATE: Duplicate IP address 192.168.100.19 from MAC 34:db:fd:a0:92:9a was detected on VLAN 1, port gi27, aggregated (5)

3. Duplicate IP address 192.168.100.19 from MAC 34:db:fd:a0:92:9a was detected on VLAN 1, port gi27, aggregated (2)

 this mac address is layer 3 second fiber port mac address:- 34:db:fd:a0:92:9a

5 Replies 5

Hi mauleshg1

 

Could you please let me know how these swithchs are connected togther ? Also please share me the configuration of ports from both switches.

 

Thanks,

M

Hi,

Madhukrishnan thanks for reply this switches is connected by fiber and this port is trunk port

Hi maulesh,

 

Could you please show me a simple drawing of this set up to understand. A quick question. Do yo have these ip address configured somewhere else too?

 

Thanks,

M

Cisco Freak
Level 4
Level 4

Hi,

What are the two IPs 192.168.100.18 and 192.168.100.19.

CF

Hi,

Freak thanks for reply two ips assigned to cisco small medium business switch

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