寫寫筆記

Cisco 2950 Switch在Show Logging時，前方是帶設備的開機時間 3w4d: %LINK-3-UPDOWN: Interface FastEthernet0/5, changed state to down 3w4d: %LINK-3-UPDOWN: Interface FastEthernet0/5, changed state to up 3w4d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/5, changed state to up 如果要帶事件發生的時間，可以輸入下面的指令 service timestamps log datetime show-timezone localtime Sep 17 02:53:54: %SYS-5-CONFIG_I: Configured from console by admin on vty0 (192.168.1.249) Sep 17 03:02:12: %SYS-5-CONFIG_I: Configured from console by admin on vty0 (192.168.1.150) Sep 17 03:04:40: %SYS-5-CONFIG_I: Configured from console by admin on vty0 (192.168.1.150) Sep 17 11:07:07 TW: %SYS-5-CONFIG_I: Configured from console by admin on vty0 (192.168.1.150) 參考資料

root@EX2200-113> show ethernet-switching table Ethernet-switching table: 147 entries, 143 learned, 0 persistent entries   VLAN              MAC address       Type         Age Interfaces   default           64:64:9b:34:TT:TT Static         - Router   vlan1             *                 Flood          - All-members   vlan1             ac:a0:16:91TT:TT Learn          0 ge-0/0/47.0   vlan10            *                 Flood          - All-members   vlan10            00:00:1c:d1:TT:TT Learn          0 ge-0/0/47.0   <---以下略過---> ...

Wiershark在抓封包的時候,一直抓到0x8899的Protocol，查了一下發現這個是Realtek用來偵測Loop的協定 因為我上層已經有開啟STP，所以我就下參數把該Mac-Address給Drop掉 2F-Switch(config)# mac address-table static 2828.5db3.cb39 vlan 1 drop 指令參考來源 註: 如果要新增某Mac-address也可以下這個指令 Switch(config)# mac-address-table static 1111.1111.1111 vlan 1 interface fastEthernet 0/1 Switch#show mac-address-table           Mac Address Table ------------------------------------------- Vlan    Mac Address       Type        Ports ----    -----------       --------    -----    1    1111.1111.1111    STATIC      Fa0/1