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Chapter8 Virtual LANs (VLANs)

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VLAN Basics 如何在 1 个交换性的网络里,分割广播域呢?答案是创建 VLAN.VLAN 是连接到定义好了的 switch 的端口的网络用户和资源的逻辑分组.给不同的子网分配不同的端口,就可以创建更小 的广播域.默认情况下,在某个 VLAN 中的主机是不可以与其他 VLAN 通信的,除非你使用 router来创建 VLAN 间的通信 | Chapter8 Virtual LANs VLANs VLAN Basics WÆ 1 A ttWlM Vtir W OM VLAN.VLAN M iJ WTW switch W nmWflWWMMMftKffl JMM r mmm vlan WiMM W KM vlan MKijmO router JM VLAN WM VLAN fâ- â i.l M WAA K ABâW VLAN K gfômn 2. s ffi VLAN WfiMIWO router VLAN iWffitt 3.SA VLAN mmWWWW VLAN WOOK 4. VLAN i tt 5. VLAN inrW S MM brWWA b Broadcast Control WWèWr mMMWmWÈ m 1. W m 2. AH eîtWAWW 3 ÿiW ffl Security A ttM VLAN W 1 A A VLAN WÆA AffiM WB router VLAN fôMfé Flexibility and Scalability VLAN fôMfë WMtt 1.WW HteSâW nW âW VLAN WMM VLAN B TBWWT ffl 2.â VLAN MW ĩmM fó VLAN M r ft M ÂWB Æ VLAN Æ Â ar  -- -- 2 2 w VLAN WAWMÄWMÄtt rMtt T VLAN Memberships ÈtWK WA VLAN P VLAN static VLAN O Stft M VLAN A VLAN dynamic VLAN Static VLANs VLAN VLAN tt W n VLAN AW 4 M. fi f VLAN -A M WWE A IP IWitOn VLAN2 KS 172.16.20.0 24 Dynamic VLANs M VLAN OWSO M MAC Mtt W SS fflg t VLAN.Cisco f M ttffl VLAN fS fe VLAN Management Policy Server VMPS AW MAC MttWOM M VLAN VMPS MAC Mtt M VLAN Identifying VLANs âmiw switches ft.W 1 â fiftfâ R lfâlg ft fiÎÎÊ -ff -A 2 1. access links fêAMXMÎ VLAN VLAN A H fe native VLAN.switches Æ llJ access-link ttMA VLAN WM.M access-link - W VLAN M WmÉ 2. trunk links ÎhAMÎc VLAN AM A O.trunk link 1 100Mbps