接觸了一些cisco和3com的交換機(jī),我想說(shuō)說(shuō)我對(duì)交換機(jī)端口模式的理解
思科cisco的multivlan和trunk是可以令一個(gè)端口同時(shí)屬于多個(gè)vlan,但multivlan只是在很少交換機(jī)(3750)或早期交換機(jī)有得配.新版本ios交換機(jī)幾乎都沒(méi)有此模式配端口了.
配了trunk就只能是用于交換機(jī)之間或者交換機(jī)與路由器之間相連.用于交換機(jī)與路由器相連時(shí),一般是作Vlan間路由用.而用于交換機(jī)之間相連是作交換機(jī)間共享VLAN信息用.
華為3com有些交換機(jī)就有端口的hybrid屬性和trunk屬性.也可以令一個(gè)端口同時(shí)屬于多個(gè)vlan,但hybrid屬性靈活,可以連主機(jī).甚至在實(shí)現(xiàn)VLAN間訪問(wèn)控制時(shí)挺特別.有關(guān)知識(shí)請(qǐng)參考華為3com的資料.
multi
Set the port to multi-VLAN port mode. The port operates as a nontrunking VLAN interface that transmits and receives nonencapsulated frames. A multi-VLAN port can be assigned to one or more VLANs.
(multivlan是不加tag的
僅部分交換機(jī)支持switchport multi vlan {add vlan-list | remove vlan-list} 也就是表明CISCO不怎么推薦用此模式)
trunk
Set the port to a trunking VLAN Layer-2 interface. The port transmits and receives encapsulated (tagged) frames that identify the VLAN of origination. A trunk is a point-to-point link between two switches or between a switch and a router.
到此對(duì)交換機(jī)端口的模式(或?qū)傩?作了簡(jiǎn)單介紹.希望對(duì)你有些幫助.