50 Dell EMC Networking with Isilon Front-End Deployment and Best Practices Guide | version 1.0S4048-ON Leaf 1 S4048-ON Leaf 2interface port-channel49description “Spine 1”no shutdownswitchport mode trunkswitchport trunk allowed vlan 100mtu 9216vlt-port-channel 49interface ethernet1/1/49description “Spine 1”no shutdownno switchportchannel-group 49 mode activemtu 9216interface ethernet1/1/50description “Spine 2”no shutdownno switchportchannel-group 49 mode activemtu 9216interface port-channel49description “Spine 1”no shutdownswitchport mode trunkswitchport trunk allowed vlan 100mtu 9216vlt-port-channel 49interface ethernet1/1/49description “Spine 1”no shutdownno switchportchannel-group 49 mode activemtu 9216interface ethernet1/1/50description “Spine 2”no shutdownno switchportchannel-group 49 mode activemtu 9216Uplink Failure Detection (UFD) is configured next. UFD is a feature that shuts down specified downstreaminterfaces when all specified uplinks become disabled.S4048-ON Leaf 1 S4048-ON Leaf 2uplink-state-group 1enabledownstream port-channel1downstream port-channel3downstream port-channel5downstream port-channel101downstream port-channel102upstream port-channel49endwrite memoryuplink-state-group 1enabledownstream port-channel1downstream port-channel3downstream port-channel5downstream port-channel101downstream port-channel102upstream port-channel49endwrite memoryFinally, exit configuration mode and save the configuration.7.3 Configuration of S4048-ON OS9 Leaf SwitchesConfigurations in this section cover the leaf switches 3 and 4 running OS9 as seen in Figure 24.