Dell PowerVault 56F Dell PowerVault 56F 16-Port Fibre Channel Switch Inst - Page 34

Installation and Troubleshooting Guide, Switch A, Switch B, E_Port, RAID A, RAID B, HOST3, HOST4,

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Each connection is full duplex with transmissions up to 1 Gbps simultaneously, in both directions, between the fabric and fabric-connected devices. The two-switch topology increases the number of connections and aggregate fabric bandwidth, as shown schematically in Figure 2-2. The switches are shown physically connected although the connections are transparent in the fabric. Functionally, the devices appear to be connected together directly. E_Port RAID A RAID B HOST3 HOST4 Switch A JBOD A HOST5 Switch B E_Port HOST1 HOST2 RAID A RAID B When a fabric is initiated, or when a new switch is added to the fabric, the switches determine a least-cost path for each destination switch. This is done dynamically each time the fabric configuration changes and the results are stored in the switch's internal routing tables. NOTE: After a path has been determined, it is not rerouted, even though traffic volume may change over time, for each path to maintain in-order delivery. If the link fails, the path is rerouted. In Figure 2-2, three connections are shown between Switch A and Switch B. This connection gives an aggregate bandwidth of six Gbps-in other words, three 1-Gbps, full-duplex connections. Increasing bandwidth between switches is done by adding additional connections between the switches. In addition to the bandwidth, redundant connections between the switches in Figure 2-2 provide a high-bandwidth, fault-tolerant fabric. 2-4 Installation and Troubleshooting Guide

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2-4
Installation and Troubleshooting Guide
Each connection is full duplex with transmissions up to 1 Gbps simultaneously, in
both directions, between the fabric and fabric-connected devices.
Ï#½ÉÁ#¼»¹Í·ÁµÆ%¶²·Ï½%½¶½ÄÅ
The two-switch topology increases the number of connections and aggregate fabric
bandwidth, as shown schematically in Figure 2-2. The switches are shown physically
connected although the connections are transparent in the fabric. Functionally, the
devices appear to be connected together directly.
±²³´µ¶·Ì¹Ìº··±¿Éµ²Å·È¼Ï¼À¼³°·Ä¿!ÏÀ¶·"²ÁÆ·ÈƵ¶¶·Ê¼ÇǶÅÁ²¼ÇË·
#¶Á½¶¶Ç·È½¼·Ä½²ÁÅƶ˷
When a fabric is initiated, or when a new switch is added to the fabric, the switches
determine a least-cost path for each destination switch. This is done dynamically each
time the fabric configuration changes and the results are stored in the switch
’
s inter-
nal routing tables.
NOTE: After a path has been determined, it is not rerouted, even though traffic vol-
ume may change over time, for each path to maintain in-order delivery. If the link fails,
the path is rerouted.
Á¿¶»º¼Âµ¿Ã·Ä¾¶¼´·Å¼¿Æǵƽȷɵ½Èµ¿·½Èº·Ê¼³»µ¶
In Figure 2-2, three connections are shown between Switch A and Switch B. This
connection gives an aggregate bandwidth of six Gbps
—
in other words, three 1-Gbps,
full-duplex connections. Increasing bandwidth between switches is done by adding
additional connections between the switches.
In addition to the bandwidth, redundant connections between the switches in
Figure 2-2 provide a high-bandwidth, fault-tolerant fabric.
Switch A
Switch B
E_Port
E_Port
RAID A
RAID B
HOST3
HOST4
HOST1
HOST2
RAID A
RAID B
JBOD A
HOST5