Tag Archives: FEX Pinning

Choosing between Dynamic and Static FEX interfaces pinning

Cisco Nexus 2200 Fabric Extenders can be connected to the parent switches using two different modes: Static and Dynamic interfaces pinning. Static pinning mode instructs the switch to virtually split FEX into few blocks of ports and statically associate each block of ports with its own physical uplink. In other words, if one particular uplink fails, a range of FEX ports, associated with this uplink, fail as well. Hence, the word Static. Dynamic pinning modeĀ is based on a Port-Channel logic. In very basic scenario you would have all your physical uplinks associated with a single Port-Channel that will stay up as long as there is at least one working physical uplink. At first glance, difference seems to be obvious and not in the favor of Static mode. But let’s dive into the subject to understand when Static mode becomes handy. Read more …