摘要：1 如果SW1,SW2没有以太口，则是否能起trunk，能的话如何实现?trunk配置复习 ----switchport trunk encapsulation dot1qswitchport mode trunkswitchport trunk allowed all(封装成PPP) Router... 阅读全文

摘要：http://www.luocong.com/learningopcode/doc/1._%E4%BB%80%E4%B9%88%E6%98%AFOpCode%EF%BC%9F.htm 阅读全文

摘要：1 - four key technologiesneighbor discovery/recovery, reliable transport protocol (RTP), DUAL finite-state machine, and protocol-dependent modules.2 -four fundamental conceptsneighbor tables, topology tables, route states, and route tagging.3- two route statesactive or passive.4 - route tagging Inte 阅读全文

摘要：协议号IP 0ICMP 1TCP 6 UDP 17IPv6 41IPv6-route 43GRE 47ESP 50AH 51IPv6-icmp 58EIGRP 88OSPF 89端口号ftp-data 20 tcp File Transfer [Default Data] (tcp 20为ftp数据端口)ftp 21 tcp File Transfer [Control] (tcp 21为ftp控制端口 )ssh 22tcp The Secure Shell (SSH) telnet 23tcp Telnet smtp 25 udp Simple Mail Transfer (tcp 25端口 阅读全文

摘要：1、 MAC地址表：查找交换机端口哪一个端口的MAC地址是0010.5a0c.ffba。 # show mac addresssw-ac3#show mac-address-table Mac Address Table-------------------------------------------Vlan Mac Address Type Ports---- ----------- -------- -----33 0010.5a0c.ffba DYNAMIC Fa0/12 、Trunk口：查找交换机的Trunk接口。 # show interfaces trunksw-ac3#sho 阅读全文