https://community.extremenetworks.com/t5/extremeswitching-exos-switch/exos-30-1-1-4-serious-bug-for-ip-security/m-p/32464#M6003 Hi,<BR /> <BR /> If it's enabled by default, you should still be able to *disable*.<BR /> <BR /> Hope that helps,<BR /> Tomasz Fri, 15 Mar 2019 22:05:00 GMT Tomasz 2019-03-15T22:05:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/exos-30-1-1-4-serious-bug-for-ip-security/m-p/32463#M6002 I have too many EX 440G2-24p-10GE switch when i upgrade firmware from XOS 22.6.1.4 to XOS 30.1.1.4 <BR /> all my switch config have enable ip-s dhcp-s vlan drop ..., i found all my user can't get IP form dhcp server<BR /> when i downgrad to 22.6.1.4 all my user can get IP address.<BR /> <BR /> <BR /> <BR /> ? Mon, 04 Mar 2019 08:04:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/exos-30-1-1-4-serious-bug-for-ip-security/m-p/32463#M6002 Helpme 2019-03-04T08:04:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/exos-30-1-1-4-serious-bug-for-ip-security/m-p/32464#M6003 Hi,<BR /> <BR /> If it's enabled by default, you should still be able to *disable*.<BR /> <BR /> Hope that helps,<BR /> Tomasz Fri, 15 Mar 2019 22:05:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/exos-30-1-1-4-serious-bug-for-ip-security/m-p/32464#M6003 Tomasz 2019-03-15T22:05:00Z