RameshsStudyGuide （下）
添加时间: 2007-9-3 21:57:16 作者: Cisco认证考试 阅读次数:31 来源: http://www.d9soft.com
config net [ip add of tftp serv]: load config info from TFTP server, Config t: console / telnet (config from my term)
Catalyst 5000 : to config port, type slot/port (e 4/2 for Ethernet, card 4, port 2), Catalyst 7000 / 7500 VIP (versatile int processor cards): type slot/port adapter/port; e 2/0/1, 3 rd Enet vip card3, first port 0, 2 nd Enet Int.
Auto Install : config router autoly and remotely. New router acts as BootP work stn & gets IP from existing router acts as BootP or RARP server, connects to TFTP server, gets network-config, hostname-config/router-config files.
BootP server: provides (by TFTP) stn.IP add, server IP add and the name of the file tobe loaded and booted.
Modes: User EXEC : After log in, you are automly in this mode, basic tests, temp term setup, conn to remote devices (router>), logout to exit, Privileged EXEC: Set OS params, config, debug,(router#) Quit/Exit to exec mode, ROM monitor: Occurs when no cisco IOS image found / boot interrupt (rommon>), Set up: occurs on first switch on, RxBoot : reboot from ext (router), Global config Mode: router(config)> commands affects whole system, exit/end to pre mode
Interface Config mode: router(config-if)# comm for config single int.
Editing: Ctrl+A-beging of line, Ctrl+E-end of line, Ctrl+F(R arrow)-move fwd 1 char, Ctrl+B(L arrow)- back 1 char, Ctrl+P(U arow)-scroll/Rpt prev comm, Ctrl+N(D arow)-recent comm recall, Esc+F-move fwd 1 word, Esc+B-back 1 word.
R>terminal editing / terminal no editing : advanced editing features on / off. R> enable / disable : privileged mode on / off
R>sh history-sh comm buffer, R>term history size- set comm buffer size, Tab: Completes comm entry,
Passwords: config t, Enable secret x, enable password x, line vty 0, login, pw x; line aux 0, login, pw x; line con 0, login, pw x; Banner: config t, banner motd #, xxx # ; Hostname: config t, hostname [newhostname]
Shutting down : config t, # int s0, # shutdown (Admntly down) # no shut down (Turn on)
DTE/DCE Cable: router use synch comm, needs clk, clock rate on DCE.+ specify bandwidth (for IGRP), Config t, int s0, clock rate 56000, bandwidth 56. def clk rate-T1, R# show controllers s0- Identifies serial port cable as DTE or DCE cable.
CSU/DSU : Chl svc unit/Data svc unit. Handles clocking on serial ports (WAN links), not used by Cisco router.
Token Ring Speed : # int token ring 2/0, # early token release, # ring-speed 16 (4-16 mb),
Media type : # int e1, # media type 10baseT, Clock set: R# clock set 11: 02: 01 04 August 1999
Config Comm: RouterR# sh startup-config/config: contents of NVRAM, sh running-config: contents of RAM,
R# erase startup-config (write erase)- erases NVRAM, starts initial config dialog, R# Setup: starts initial config dialog,
R# write term-sh run config, write mem- copy run start, config mem- copy start run, config net [ip ad of tftp ser]-lod config frm tftp, write network/R# copy run tftp (backup, ram>tftp serv), copy tftp run (restore), R# reload: lod startup confi to mem,
IOS Comm: R # copy flash tftp (ios backUp), # copy tftp flash (ios restore), Fallback-gives alternative IOS loading booting sources: config t, # boot system flash [ios_filename], boot system TFTP [ios_filename] [ TFTP_ip add], boot system ROM
R# erase- erases flash, # delete- (if multi flash), if ext flash card # delete-only marks the IOS, # squeeze-deletes IOS.
R# sh flash-flash mem stat, all IOSs file name, # sh version-sh current IOS file (if multi flash), hw config, sw ver, Register setting, boot images, sh process: active process, cpu utilzn, sh mem: mem allctn stat, sh stacks- sh reason for crash/reboot,
R# sh buffer- sh buffer stat, sh int- sh all int config, sh proto: sh all layer3 proto config, sh ip proto- IP proto in detail
Cisco Discovery Protocol (CDP): allows access config info on other routers with single command, uses SNAP broadcasts at DLLayer. CDP starts by default (ver10.3/later) & discovers neighboring routers running CDP thro data link broad. updates: 60 sec, holdtime: 180 sec, # config t, # cdp timer 60, # cdp holdtime 180 (global), R# sh cdp int: int stat, config info, encaps, cdp timers. R# sh cdp entry */ routerA: * shows info recd from all routers / only router A. R# sh cdp neighbors: shows cdp updates (device ID, local int/port, holdtime, capability, platform5000, neibhor port ID) (capa- R router, T trans bridge, B source route bridge, S switch, H host, I igmp), R# sh cdp neighbors detail: shows cdp enrty+ sh cdp neighbors
R# sh cdp traffic: reveals amount of pkts sent & recd among neighbors; config t, # no cdp run (cdp off-all int-router),
# config int, # no cdp enable (cdp off- single int)
Telnet : Virtual Term conns: part of tcp/ip proto allows to connect to remote hosts and routers. Cisco supports 5 simultaneous (vty 0 4) telnet sessions. R# telnet [ip add], ip add of any active int on the router. R# exit: to close session.
Ctrl+shift+6 X : return to org router w/o closing telnet. # 1, return: takes back to telnet session
R# sh sessions : sh all telnet sessions/conn no, host, add, byte, idle, conn name.
Hostnames: router can resolve ip add to hostnames. Config t, # ip host routerC 23 172.16.40.2 (23 telnet port- optl),
R # sh host / s: sh all> hosts, flags (perm/temp, ok/ex), age (hrs), type (proto), ip add, t# no ip domain-lookup: disables router DNS lookup (enabled by default), to re-enable DNS lookup, t# ip domain-lookup, t# ip name-server 172.16.30.8 (max 6 add)
IP Add config: config t, # int s0, # IP address [ ip-add] [ subnet-mask] - config IP add, Subnet mask for serial int s0.
# sh interfaces-shows all interface types & their associtd IP adds. use CDP command to see IP add of neighbor routers.
Inter Network Testing : R# telnet : shows all layers are working, verify appl layer commn between the hosts.
R# Ping 172.16.10.1- uses IP & ICMP proto to verify commn at Inet layer between hosts (! echo replay recd, . time out,
U dest un reachable, C congested exp pkt, ping interupted, ? pkt type unknown, & pkt TTL exceeded.)
R# trace ip 172.16.40.2 uses TTL values (!H-recd probe not forward due to access list, P proto un reach, N net unreach,
U port unreach,* time out, (trace used in IP, AppleTalk, CLNS, Vines, Old Vines), R# sh int so : shows
line & data link
proto status, R# debug all, # undebug all,
IP Routing : Source and Destn. Hardware add keeps changing, but IP add remains same as pkt travels thro?routers.
Dest IP remains same, frame keeps changing at each hope b’cos source, destn h/w add keeps changing.
Static Routing config t, # ip route [rem net ID] [subnetmask] [def Gway,next hop add / interface][distance]- cisco book
# no ip route [remote net ID]- to cancel a route, # sh ip route-sh R table/all routes, # sh ip route static-sh only static routes,
# ip classless global command to use def routing with static routing to forward pkts destd to obscure subnets to best route. Default Routing : default route = router or gateway of last resort, # ip route [0.0.0.0] [0.0.0.0] [gateway IP/next hop add] # ip default-network 192.68.17.0 : Default route as per Cisco book, # no ip routing (disable), # ip routing (re enable)
Dynamic Routing : Autonomous System(AS): consists of routers that share info using same protocol. Backbone + areas. Routing within area/domain-Intra Domain Routing, Ext / Inter domain / inter AS Routers connect areas to backbone.
Codes- # sh ip route- C-dir conntd, S-static, I-IGRP, R-RIP, M-mobile, B-BGP, D-EIGRP, EX-EIGRP ext,
O-OSPF, IA-OSPF inter area, E1- OSPF ext type1, E2-OSPF ext type2, E-EGP, I-ISIS, L1-ISIS lvl 1, L2-ISIS lvl 2.
Config PRI: for each ISDN PRI int, need to specify Data link specific info for the T1 controller, this way PRI commtes with ISDN switch, Framing & line coding info is essential. # config t, # controller T1 1/0, # int pri0, # framing esf,
# linecode b8zs, # pri-group timeslots 1-24, Extended Superframe Framing (ESF) is used in T1 ckts, consists 24 frames of 192 data bits each, with bit 193 provides timing & other functions. B8ZS is a binary eight-zero substitution line-coding mechanism guarantees delivery of data of 8 cont. zeros. Time slots 1-24 defines ISDN PRI time slots 1 to 24.
上一篇文章: RameshsStudyGuide （上） 下一篇文章: CiscoCCNP-BSCN(1)
相关文章:
相关软件: