Dual switching modules provide redundant switching paths These modules are made

Dual switching modules provide redundant switching

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Dual switching modules provide redundant switching paths. These modules are made up of switching ASICs or crossbars (XBAR). Dual CPU modules or supervisor modules are included for fabric frame processing, director monitoring, and management. These modules are redundant with one active and one in standby mode, ready to take over if the active module fails. Each has its own RAM for working memory and NVRAM for storing firmware, logs, and configuration information. Each CPU module has its own management port interfaces and may also have a USB port. All directors have N+1 power supplies and fans. Connectrix Fundamentals
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25 Copyright © 2017 Dell Inc. This lesson covers best practices when implementing Storage Area Networks using Dell EMC Connectrix switches. Connectrix Fundamentals
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26 Copyright © 2017 Dell Inc. There are several types of ports defined in the Fibre Channel standard. Shown are the most common port types we encounter in basic storage area networks. N_Ports are the Node ports . This type of port is for device nodes to connect to the fabric. Typically, it is a host port (HBA) or a storage array port. F_Ports are the Fabric ports . This type of port is only found on a switch and is connected via a Fibre Channel cable to an N_Port. E_Ports are the Expansion ports . This type of port connects via an ISL to another E_Port. E_Ports are used to form a fabric with other switches. We normally have at least two ISLs between switches for redundancy. G_Ports are the Generic ports on Connectrix B-Series switches that are not connected to anything. When connecting a link, a G_Port automatically changes its operating mode to F_Port or E_Port. The mode of operation is dependent upon the port type at the other end of the link. Connectrix Fundamentals
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27 Copyright © 2017 Dell Inc. Typically we represent a SAN as a cloud, to hide the complexity of the connectivity infrastructure underneath. When we peer into the cloud, we can see the details. Here we have the simplest type of SAN built from a single switch. The Connectrix family has several models of entry-level switches that may be used for small single-switch SANs. Building a SAN from one of these entry level switches is simple and requires little Fibre Channel knowledge. This solution is ideal where a few hosts are running applications that share block storage on a small storage array. If the array does not have enough connections to accommodate all the hosts, a switch solves the problem. Dell EMC offers single switch “out -of-the- box” solutions that require minimal configuration. Both Connectrix B-series and MDS-series products have entry-level models. An example of this type of switch is the Connectrix DS-300B. It comes with an EZSwitchSetup wizard that automatically sets up the switch ports and configures port-based zoning. The user simply plugs the hosts into the ports designated as host ports, and the storage is plugged into the ports designated for storage. The EZSwitchSetup wizard does the rest. These entry-level switches can also work as edge switches in bigger multi-switch SAN topologies.
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