10 Gbps Ethernet Revised 10 Gbps Ethernet usage is small but growing Several 10 Gbps fiber standards are defined but none is dominant 4-11
4-11 10 Gbps Ethernet • 10 Gbps Ethernet usage is small but growing • Several 10 Gbps fiber standards are defined, but none is dominant Revised
10 Gbps Ethernet Revised 10 Gbps Ethernet usage is small but growing Several 10 Gbps 10GBASE-x fiber standards are defined but none is dominant Copper is cheaper than fiber but cannot go as fa 10GBASE-CX4(shielded Infiniband cable)up to 15m UTP Category 6: 55 meters maximum (UTP) Category 6A: 100 meters(UTP Category 7: 100 meters(shielded twisted pair, STP, which has metal shielding around each pair and around the cord) 4-12
4-12 10 Gbps Ethernet • 10 Gbps Ethernet usage is small but growing • Several 10 Gbps 10GBASE-x fiber standards are defined, but none is dominant • Copper is cheaper than fiber but cannot go as far – 10GBASE-CX4 (shielded Infiniband cable) up to 15 m – UTP • Category 6: 55 meters maximum (UTP) • Category 6A: 100 meters (UTP) • Category 7: 100 meters (shielded twisted pair, STP, which has metal shielding around each pair and around the cord) Revised
100 Gbps Ethernet New Information 100 Gbps has been selected as the next ethernet speed 100 Gbps ethernet standards development is just getting underway 4-13
4-13 100 Gbps Ethernet • 100 Gbps has been selected as the next Ethernet speed • 100 Gbps Ethernet standards development is just getting underway New Information
Figure 4-4: Link Aggregation(Trunking or Bonding 链路汇集(中继或捆绑) 1000BASE-SX Switch We have been looking at single cords Link aggregation or bonding allows you to bond two or more cords between two switches 1 Gbps 1 Gbps Cord In this example, if you need 1.6 Gbps Cord two bonded 1 Gbps links will meet your need at lower cost han moving to a 10 Gbps switch Link aggregation allows incremental growth in speed and cost 1000BASE-SX Switch 4-14
4-14 Figure 4-4: Link Aggregation (Trunking or Bonding) 链路汇集（中继 或 捆绑） 1 Gbps 1 Gbps Cord Cord 1000BASE-SX Switch We have been looking at single cords Link aggregation or bonding allows you to bond two or more cords between two switches In this example, if you need 1.6 Gbps, two bonded 1 Gbps links will meet your need at lower cost than moving to a 10 Gbps switch. Link aggregation allows incremental growth in speed and cost 1000BASE-SX Switch
Figure 4-5: Data Link Using Multiple Switches Original Received Regenerated Signal Signal Signal Switches regenerate signals before sending them out this removes propagation effects It therefore allows signals to travel farther 4-15
4-15 Figure 4-5: Data Link Using Multiple Switches Original Signal Received Signal Regenerated Signal Switches regenerate signals before sending them out; this removes propagation effects. It therefore allows signals to travel farther