Static DHCP Table entries - potential issue with USG / Zywall

imaohwimaohw Member Posts: 77  Ally Member
I use the Static DHCP Table entries on the "Edit VLAN" screen to assign specific IP addresses to specific MAC address in that VLAN. This has been working well.

I now have the need to provide a specific IP address to a switch for each VLAN defined on the switch. All of the IP addresses are associated with the same MAC address but in a different VLAN. For example:

Switch IP for vlan 1 - 192.168.1.1
Switch IP for vlan 2 - 192.168.2.1
Switch IP for vlan 3 - 192.168.3.1

All of the above IO addresses are associated with the same MAC Address.

I can set this up thru the "Edit VLAN" screen for each VLAN and it seems to work fine.  However if I use the "Edit IP/MAC Binding" screen for any of the VLANs and try to add or edit an entry which contains the switch's MAC address I get a "Duplicate MAC Address!" error.

It appears as if the system is checking for any other entry with the same MAC Address but not considering the VLAN.

Comments

  • Zyxel_CharlieZyxel_Charlie Zyxel Official Agent Posts: 848  mod
    @imaohw
    Regarding to this case,
    can I confirm the situation that if you configure the same MAC address with different IP address on IP/MAC binding of each Vlan interface, you will get "Duplicate MAC Address"?

  • imaohwimaohw Member Posts: 77  Ally Member
    That is correct. When using the “Edit IP/MAC Binding” screen I get the Duplicate MAC error using the same MAC Address with a different IP address in each VLAN.

    But it works fine if I do the same thing using the Static DHCP Table section of the “Edit VLAN” screen.
  • imaohwimaohw Member Posts: 77  Ally Member
    @Zyxel_Charlie - while I was able to add the static IP assignment for the same MAC address in two different Vlans using the Vlan screen today when I tried to add a LAG to the USG I got a Duplicate MAC Address error.

    The only way I could add the LAG to the USG was to first remove the entry in the Static IP address table for the second Vlan.
  • Zyxel_CharlieZyxel_Charlie Zyxel Official Agent Posts: 848  mod

    @imaohw
    Thanks for your information.
    We have confirmed this behavior internally, so any modification will keep you post.


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