寫寫筆記

802.1Q Trunking *Trunk不屬於任何VLAN,可以承載所有VLAN *兩端設備 Native VLAN要相同() *Trunk Port不能使用Port-Security |Dest|SRC|Len/Etype|Data(46-1500)|FCS|   Ethernet Frame |Dest|SRC| Tag |Len/Etype|Data(46-1500)| FCS(重新演算) | 802.1Q Frame Tag=   | EtherType(0x8100) | PRI | Token Ring Encapsulation  F lag | VLAN ID | Tag=  |----------- 16Bit-------- | 3Bit | -------------------1Bit---------------- | ----12Bit-- | (總共4Byte) Native VLAN (Native VLAN-->Untagged) *預設為VLAN 1，只能有一個Native VLAN *所有資料到Trunk都會加Tag，只有Native Vlan不加Tag *802.1Q 才有 -------------------------------------------------------------------------------------------- 查看介面Trunk的相關資訊 這個範例是兩台2950的Port 1對接 SW1# show interfaces fa 0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode:  dynamic desirable Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (de

老闆出國兩個禮拜，一大早寄信告知不能寄信，提醒他使用非公司網路寄信要驗證，順便給他一張國外ISP業者的SMTP Server清單 http://www.host45.com/resources/ispsmtps.php 希望他一切順利 ^^