Term
| List and describe three important considerations for distance between nodes. |
|
Definition
1. Inc distance requires additional buffer credit.
2. Optical implementations
3. MAN/WAN implementations |
|
|
Term
| What is the formula for determining switch latency? |
|
Definition
Propagation delay is 5 microseconds / meter over optical fiber.
Switch (2 microseconds per switch * num of hops) + propagation delay |
|
|
Term
| Describe how buffer credits work. |
|
Definition
| Used to control the flow the frames between between the sending port's transmit buffers and the next port's receiving buffers. It regulates the flow of frames into and out of the fabric, allowing the fabric to manage congestion. |
|
|
Term
| Buffer credit is used with Class ___ and ___ service. |
|
Definition
Class 2 and 3 of service.
Class 2 - Ack (= BB_Credits on each side)
Class 3 - R_Rdy (!= BB Credits on each side) |
|
|
Term
| State the major consideration when using a customer's existing cabling. |
|
Definition
1. Distance between nodes
2. Passive connections (patch panels and couplers) used. |
|
|
Term
| Describe the preferred connectivity for HBAs in a dual switch storage network. |
|
Definition
| Connect each HBA to a different switch. |
|
|
Term
| Describe the preferred connectivity of multiple HBAs in a storage network with a single director. |
|
Definition
| Spread across multiple ASICs. |
|
|
Term
| Identify the requirements for HBA selection. |
|
Definition
|
|
Term
| Indicate the major factor in determining HBA performance. |
|
Definition
|
|
Term
| State how you can achieve high and ultra-high availability in your customer's storage network. |
|
Definition
|
|
Term
| Indicate what storage network components allow for increased scalability. |
|
Definition
|
|
Term
| State the purpose of a bridge. |
|
Definition
| Allows connectivity for legacy devices that do not support fibre channel connections. Most common is SCSI to FC, but SSA (Serial Storage Architecture) to FC is also available. |
|
|
Term
| Identify the major considerations for selecting a storage device. |
|
Definition
1. Software applications that run on the storage device
2. Num of ports on storage device.
3. Type of connections supported by storage device.
|
|
|
Term
| When selecting which bridge to implement, the number of ________ ports and ________ ports must be considered. |
|
Definition
| When selecting which bridge to implement, the number of fibre channel ports and SCSI ports must be considered. |
|
|
Term
| Which fibre channel connector was the fibre channel standard until recently. |
|
Definition
|
|
Term
| Which fibre channel connector is the new small form factor fibre channel standard. |
|
Definition
|
|
Term
| Which fibre channel connector is used heavily in the patch panel environment. |
|
Definition
|
|
