https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/switch-engine-exos-config-with-dhcp-option-43/m-p/121759#M12933 <P>Is there a official document for the vendor class identifier? I can't figure out which vci is used for 5420 and 5520.</P><P>Thanks for your help.</P> Mon, 11 May 2026 12:02:14 GMT Bluescreen 2026-05-11T12:02:14Z https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/switch-engine-exos-config-with-dhcp-option-43/m-p/121759#M12933 <P>Is there a official document for the vendor class identifier? I can't figure out which vci is used for 5420 and 5520.</P><P>Thanks for your help.</P> Mon, 11 May 2026 12:02:14 GMT https://community.extremenetworks.com/t5/extremecloud-iq-site-engine/switch-engine-exos-config-with-dhcp-option-43/m-p/121759#M12933 Bluescreen 2026-05-11T12:02:14Z