-->The Nexus 2000 Fabric Extender does not perform any local switching functions, and all traffic is forwarded to the parent switch such as Nexus 5K,7K,9K.
--> The Nexus 2200 Fabric Extenders can be connected to the parent switches using two different methods,
i) Static interface pinning
ii) Dynamic interface pinning
--> In Static Interface Pinning method, A group of ports in Fabric Extender and assign this ports manually with one uplink for sending traffic to the parent switch.
--> if one particular uplink fails, a group of FEX ports associated with this uplink, fail as well.
--> The pinning is based on the number of uplinks available to the Parent Switch.
--> Static pinning is recommended when you want tight control over the bandwidth and oversubscription in the network.
--> In Dynamic Interface Pinning method, we use port channel to connect from Fabric Extender to Parent Switch instead of connecting the interfaces directly.
--> If one of the particular uplink fails, a group of FEX ports associated with this uplink does not fail as we are using port channel to connect parent switch.
--> The choice of pinning mode depends upon the way how the servers are connected to the access switches.
--> For dual-homed servers, static pinning results in more deterministic oversubscription ratios. However, for single-homed servers, dynamic pinning provides increased availability.
Configuration of Pinning
N5K(config-fex)# description FEX100
N5K(config-fex)# exit
N5K(config)# interface ethernet 1/1
N5K(config-if)# switchport mode fex-fabric
N5K(config-if)# fex associate 100
N5K(config-if)# no shutdown
N5K(config)# interface ethernet 1/2
N5K(config-if)# switchport mode fex-fabric
N5K(config-if)# fex associate 100
N5K(config-if)# no shutdown
--> The Nexus 2200 Fabric Extenders can be connected to the parent switches using two different methods,
i) Static interface pinning
ii) Dynamic interface pinning
--> In Static Interface Pinning method, A group of ports in Fabric Extender and assign this ports manually with one uplink for sending traffic to the parent switch.
--> if one particular uplink fails, a group of FEX ports associated with this uplink, fail as well.
--> The pinning is based on the number of uplinks available to the Parent Switch.
--> Static pinning is recommended when you want tight control over the bandwidth and oversubscription in the network.
--> In Dynamic Interface Pinning method, we use port channel to connect from Fabric Extender to Parent Switch instead of connecting the interfaces directly.
--> If one of the particular uplink fails, a group of FEX ports associated with this uplink does not fail as we are using port channel to connect parent switch.
--> The choice of pinning mode depends upon the way how the servers are connected to the access switches.
--> For dual-homed servers, static pinning results in more deterministic oversubscription ratios. However, for single-homed servers, dynamic pinning provides increased availability.
Configuration of Pinning
N5K(config-fex)# description FEX100
N5K(config-fex)# exit
N5K(config)# interface ethernet 1/1
N5K(config-if)# switchport mode fex-fabric
N5K(config-if)# fex associate 100
N5K(config-if)# no shutdown
N5K(config)# interface ethernet 1/2
N5K(config-if)# switchport mode fex-fabric
N5K(config-if)# fex associate 100
N5K(config-if)# no shutdown
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