CCNA课堂精简笔记

1 2 3 OSI Protocol data unit 1 Bit 2 MAC Frame 3 IP Packet 4 Segment 5 DATA 6 DATA 7 DATA Bit Frame Packet Segment PDU Protocol Data Unit 1 2 BNC AUI RJ45 SC ST 3 100 4 HUB HUB HUB Rollback CISCO 1 2 3 1 2 Routing Table 3 4 1 TCP 2 UDP 3 show hosts show sessions TELNET clear line XXX x enable disable configure terminal interface ethernet 0 1 slot 0 1 exit end 1 CISCO CATALYST Default Settings 2 C ISCO Router SETUP STEP BY STEP CONFIG 1 CONSOLE PORT 2 AUX port MODEM 3 Telnet VTY hostname r6 config interface ethernet 0 r6 config if ip address 1 1 1 1 255 255 255 0 show version IOS show running config RAM show interface ethernet 0 1 reload Router setup setup show history terminal history size 0 copy running config startup config nvram startup config ram running config startup config banner motd char c char c description x console line conosle 0 consolo 0 password cisco cisco login login enable password enable enable secret enable service password encryption vtp Telnet line vty 0 password cisco login UP inerface loopback ip address 1 1 1 1 255 0 0 0 IP end ping 1 1 1 1 no DCE DTE show controllers serial 0 DCE DTE DCE Router clock rate DCE Serial1 is administratively down Line protocol is down no shutdown Serial1 is down Line protocol is down 1 no shutdown 2 Serial1 is up line protocol is down 1 serial default encapsulation HDLC 2 Serial1 is up line protocol is up show cdp neighbors CDP IP show cdp neighbors detail CDP IP show cdp entry CDP IP r1 config no cdp run CDP r1 config if no cdp enable CDP clear cdp table CDP show cdp interface serial 1 CDP Sending CDP packets every 60 seconds 60 cdp HoldTime 180 seconds CDP 180 ip host Telnet telnet line vty enable show users show sessions telnet clear line telnet disconnect telnet show flash flash IOS copy running config tftp running config tftp copy tftp running config copy startup config tftp copy tftp startup config copy flash tftp copy tftp flash copy flash tftp 1 1 1 1 c2500 ik8os l 122 31 bin ROM Rom monitor Mini IOS os BIOS Mini IOS 2500 serial Router boot IOS nvRam Startup config Configuration register Router show version router configuration register 0 x0 router Rom monitor 0 x1 Router mini ios BOOT 0 x2 Router Flash IOS Default config regcode 0 x2142 startup config setup mode 0 x2102 router config register 0 x2142 function 1 Address learing 2 Forward Filter Decision 3 Loop avoidance 1 2 3 cisco FCS FCS 64 CISCO CISCO 1900 1 2 3 4 show ip route ip route Destnation Network IP NetMask NextHopIP LocalInterface Destnation Network IP IP NetMask NextHopIP IP LocalInterface 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 s1 RA s0 s1 RB s0 s1 RC s0 1 1 2 1 2 1 RA ip route 4 0 0 0 255 0 0 0 2 0 0 2 ip route 4 0 0 0 255 0 0 0 s0 IGPs RIPv1 RIPv2 IGRP EIGRP OSPF ISIS EGPs BGP RIP IGRP MTU 1 copy 2 3 4 RIPv1 IGRP 1 2 3 4 5 rip Router information protocol Rip V1 255 255 255 255 1 2 6 default set to 4 3 30s Router rip rip network 1 rip 2 show ip protocols RIP rip 120 debug ip rip RIP clear ip route route Rip Version 2 ripv2 224 0 0 9 router rip version 2 rip version 2 no auto summary Ripv2 A config key chain A A A config keychain key 1 1 A config keychain key key string cisco A config keychain key exit A config keychain exit A config inte s 1 s 1 A config if ip rip authentication key chain A A A config if ip rip authentication mode md5 RIP passive interface neighbor neighbor passive interface neighbor passive interface IGRP CISCO CISCO IGRP 1 2 3 4 5 MTU IGRP IGRP IGRP IGRP 24bit IGRP router igrp as number network A B C debug ip igrp events igrp debug ip igrp transactions igrp 1 OSPF lsa 2 3 4 EIGRP 32 K AS T1 5s hello packet T1 60s hello packet EIGRP 170 EIGRP 90 show ip eigrp neighbors EIGRP show ip eigrp topology EIGRP show ip route eigrp EIGRP EIGRP router eigrp 100 network 192 168 1 0 0 0 0 3 network 192 168 1 4 0 0 0 3 debug ip eigrp neighbor debug ip eigrp notifications OSPF OSPF IP Protocol Number 89 OSPF IP Link State Routing Protocols SPF OSPF 1 2 3 OSPF 1 Down 2 Init 3 Two Way 4 ExStart 5 ExChange 6 Loading 7 Full OSPF 1 2 3 LSA 4 OSPF 1 2 RouteID DR Designated Router RouterID 1 IP RouterID 2 IP RouterID 10 1 1 0 0 0 0 255 10 1 1 0 255 255 255 0 10 1 1 1 255 255 255 255 10 1 1 1 0 0 0 0 Router ospf 1 network 192 168 1 0 0 0 0 255 area 0 OSPF show ip ospf neighbor NeighborID RouterID show ip ospf interface serial 1 RouterID OSPF show ip protocols show ip route ACL 1 2 ACL 1 1 99 1300 1999 2 100 199 2000 2699 ACL 1 2 ACL 1 in 2 out ACL ACL 1 ACL london Denver access list 1 deny host 10 3 3 1 access list 1 permit any access list 1 deny any 2 ACL london Ping Denver 1 ACL london telnet Denver 2 10 3 3 1 172 16 3 1 ICMP Internet Control Message protocol None None Deny 10 3 3 1 172 16 3 1 TCP None 23 Permit access list 100 deny ICMP host 10 3 3 1 host 172 16 3 1 access list 100 permit TCP host 10 3 3 1 host 172 16 3 1 eq 23 access list 100 permit IP any any show ip interface serial 0 acl show ip access lists MAC BPDU Bridge Protocol Data Unit BridgeID Bridge Priority MAC address BPDU 10Gbps 2 1Gbps 4 100Mbps 19 10Mbps 100 1 BridgeID Lowest 2 1 Bandwidth Cost Lowest 2 Recevied BridgeID Lowest 3 BridgeID Lowest 1 2 4 20s 15s 15s show spanning tree brief 3500 xl 2950 3550 show spanning tree show spanning tree interface fastEthernet 0 23 spanning tree vlan 1 priority cost interface fa0 24 spanning tree vlan 1 cost VLAN 1 A vlan A broadcast domain A logic subnet 2 VLAN VLAN 1 2 VLAN 3 VLAN VLAN 1 VLAN 2 MAC VLAN TRUNK VLAN VLAN vlan database VLAN vlan 10 name cisco CISCO 10 VLAN vlan 20 20 VLAN apply exit VLAN vlan 1 VLAN VLAN VLAN1 VLAN interface fastethernet 0 1 0 1 switchport access vlan 10 VLAN 10 end 1900 ISL 2950 802 1Q 3550 802 1Q ISL 2950 802 1Q interface fastethernet 0 1 fa0 1 switchport mode trunk trunk 3550 802 1Q interface fastehternet 0 1 fa0 1 switchport trunk encapsulation dot1q dot1q isl switchport mode trunk trunk show interface trunk TRUNK show interfaces fastethernet 0 1 switchport VTP Vlan Trunk Protocol VTP VLAN VTP TRUNK VTP 1 Server 2 Client 3 TransParent VTP VTP 5 VTP VTP vlan database vlan vtp domain VTP vtp password VTP vtp server server server client transparent vtp pruning exit show vtp status VTP 1 PPP HDLC SLIP 2 PPP HDLC SLIP 3 X 25 Frame Relay ATM HDLC 1 cisco hdlc 2 standard hdlc CISCO serial cisco HDLC cisco hdlc standard hdlc PPP NCP LCP PPP 1 PAP 2 CHAP HASH PAP HDLC interface serial 0 encapsulation HDLC PPP hostname ABC username 123 password cisco interface serial 0 encapsulation PPP PPP ppp authentication CHAP CHAP chap pap debug ppp authentication PPP PPP interface serial 0 encapsulation PPP PPP ppp chap hostname abc CHAP ppp chap password cisco CHAP FRAME RELAY 1 2 PVC DLCI PVC LMI BECN FECN FRAME RELAY pvc 1 2 3 hub and spoke FRAME RELAY LMI 1 CISCO 2 ANSI 3 Q993A FRAME RELAY FRAME RELAY FRAME RELAY FRAME RELAY frame relay switching interface Serial0 no ip address encapsulation frame relay clockrate 64000 frame relay lmi type ansi frame relay intf type dce frame relay route 110 interface Serial1 120 interface Serial1 no ip address encapsulation frame relay clockrate 64000 frame relay lmi type cisco frame relay intf type dce frame relay route 120 interface Serial0 110 show frame relay lmi show frame relay pvc show frame relay map FRAME RELAY interface s 1 encapsulation frame relay ip add 10 1 1 1 255 255 255 0 interface s 1 no ip add encapsulation frame relay no shut interface s 1 point to point ip add 10 1 1 1 255 255 255 0 ip frame relay interface dlci PVC PVC interface Serial1 no ip address encapsulation frame relay interface Serial1 1 multipoint ip address 10 1 1 1 255 255 255 0 frame relay map ip 10 1 1 2 110 broadcast IP A 10 0 0 0 8 B 172 16 0 0 16 172 31 0 0 16 C 192 168 0 0 24 192 168 255 0 24 IP Internet IP NAT 1 NAT 2 NAT 3 PAT NAT B config inte s 0 B config if ip nat inside S0 inside B config inte s 1 B config if ip nat outside S1 outside 192 168 1 10 IP 1 1 1 1 B config ip nat inside source static 192 168 1 10 1 1 1 1 NAT B config inte s 0 B config if ip nat inside S0 inside B config inte s 1 B config if ip nat outside S1 outside NAT B config access list 1 permit any IP B config ip nat pool abc 1 1 1 1 1 1 1 30 prefix length 24 list 1 IP pool abc IP B config ip nat inside source list 1 pool abc B show ip nat translations PAT B config inte s 0 B c