https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86937#M20782 We have recently installed a x440-G2. We are unable to boot into the UEFI imaging environment from our KACE box when directly connected to the switch. However if we place an unmanged 8 port switch between the systems and the x440 it boots in just fine. When have other systems in the office connected to the x440 and they are all functioning fine. Any thoughts? Wed, 29 May 2019 01:39:58 GMT dcsdne 2019-05-29T01:39:58Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86937#M20782 We have recently installed a x440-G2. We are unable to boot into the UEFI imaging environment from our KACE box when directly connected to the switch. However if we place an unmanged 8 port switch between the systems and the x440 it boots in just fine. When have other systems in the office connected to the x440 and they are all functioning fine. Any thoughts? Wed, 29 May 2019 01:39:58 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86937#M20782 dcsdne 2019-05-29T01:39:58Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86938#M20783 I think you need to configure igmp correctly or you need to disable igmp-snooping. By default it's enabled in XOS and switch will not flood multicast frames. But in this case a querrier is required. Wed, 29 May 2019 17:13:51 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86938#M20783 PeterK 2019-05-29T17:13:51Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86939#M20784 Thank you for the reply. This imaging environment is actually all uni-cast based. Wed, 29 May 2019 21:37:56 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86939#M20784 dcsdne 2019-05-29T21:37:56Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86940#M20785 To resolve the issue I disabled stpd and all our systems are booting into the imaging environment without a problem Thu, 30 May 2019 04:25:51 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/uefi-boot-environment/m-p/86940#M20785 dcsdne 2019-05-30T04:25:51Z