Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Phan_Tu_346089's avatar
Phan_Tu_346089
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Mar 04, 2018

Duplicate IP on interface MGT

Hi all! I got this problem. Sometime I can not ssh of login web ui via interface mgt on F5. I tried to change IP on interface mgt to other IP a then I can ssh normally. But the old IP is still remain...
big-ip
security
Robell_Pontes_7's avatar
Robell_Pontes_7
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Mar 05, 2018

hold on...how are you changing the MGMT IP? are you working directly on the bigip config files? If you're not fully familiar with F5 config, you shouldn't be doing that.

 

To change the MGMT IP from the F5 webGUI, go to System >> Platform

 

  • Phan_Tu_346089's avatar
    Phan_Tu_346089
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    Mar 05, 2018

    I changed it via System >> Platform. After change --> No ip 61 on bigip_base.conf. But Still can ping 69.61. I want to know where is it on my BigIP F5. And how to delete it.

     

  • Robell_Pontes_7's avatar
    Robell_Pontes_7
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    Mar 05, 2018

    are you sure is not a self-ip?

     

    If you cannot find the IP in either bigip.conf nor bigip_base.conf, there may be another device using that IP in your network.

     

  • Phan_Tu_346089's avatar
    Phan_Tu_346089
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    Mar 05, 2018

    I can confirm the ip 61 is from BIGIP. When I disconnect the link. Both IP 61 and IP 70 can not be reached. And two mac address: Old IP: 10.220.69.61 MAC f4-15-63-f6-63-00 New IP: 10.220.69.61 MAC f4-15-63-f6-63-02

     

    They are just difference a little bit.