Cisco Router Grundlagen

Unprivilegierter Modus

Befehle anzeigen

cisco2600>?
Exec commands:
  clear            Reset functions
  disable          Turn off privileged commands
  disconnect       Disconnect an existing network connection
  enable           Turn on privileged commands
  exit             Exit from the EXEC

Show nachgeordnete Befehle anzeigen

cisco2600>show ?
  backup         Backup status
  c2600          Show c2600 information
  cca            CCA information
  cdapi          CDAPI information
  cef            Cisco Express Forwarding
  class-map      Show QoS Class Map
  clock          Display the system clock
  compress       Show compression statistics
  connection     Show Connection

Version anzeigen

cisco2600>show version 
Cisco Internetwork Operating System Software 
IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T3,  RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 04-Jul-03 05:02 by dchih
Image text-base: 0x80008088, data-base: 0x808D2AD0

ROM: System Bootstrap, Version 12.2(6r),  RELEASE SOFTWARE (fc1)

cisco2600 uptime is 24 minutes
System returned to ROM by power-on
System image file is "flash:c2600-d-mz.120-7.T3.bin"

cisco 2610 (MPC860) processor (revision 0x00) with 26624K/6144K bytes of memory.
Processor board ID JAD062603WX (2830545266)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Enable Modus

Wechsel in den Enable Modus

cisco2600>enable
Password: (blind eintippen) 
cisco2600#

Konfiguration sichern und wiederherstellen

Altes IOS sichern

cisco2600# copy flash:c2600-d-mz.120-7.T3.bin tftp:
Address or name of remote host []? 192.168.240.1                           
Destination filename [c2600-d-mz.120-7.T3.bin]? cisco2600/c2600-flash (Unterordner mit lese-und schreibrechten)

Alte Konfiguration wiederherstellen

cisco2600# copy tftp: running-config
cisco2600# Address or name of remote host []? 192.168.240.1
cisco2600# Source filename []? cisco2600/c2600-flash
cisco2600# Destination filename [running-config]?

Konfigurations Modus

Wechsel in den Konfigurations Modus

cisco2600#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
cisco2600(config)#

Grundkonfiguration

Setzen des Hostnamens

cisco2600#configure terminal
cisco2600(config)#hostname unkerich
unkerich(config)#exit
unkerich#

Setzen des Domainnamens

unkerich#
unkerich(config)#ip domain-name schluries.int
unkerich(config)#exit
unkerich#

Eintellen der Interfaceparameter (100basetx, 100basefull)

unkerich#configure terminal
unkerich(config)#interface ethernet 0/0
unkerich(config-if)#ip address 192.168.250.97 255.255.240.0
unkerich(config)#interface ethernet 1/0
unkerich(config-if)#ip address 172.22.2.1 255.255.255.0
unkerich(config-if)#exit

Aktivieren der Interfaces

unkerich#configure terminal 
unkerich(config)#interface ethernet 0/0
unkerich(config-if)#no shutdown 
unkerich(config-if)#interface ethernet 1/0
unkerich(config-if)#no shutdown           
unkerich(config-if)#exit
unkerich(config)#

Anzeige des Status des Interfaces

unkerich#show interfaces ethernet 1/0
Ethernet1/0 is up, line protocol is up 
  Hardware is AmdP2, address is 000a.4142.abd0 (bia 000a.4142.abd0)
  Internet address is 172.22.2.1/24
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
 Encapsulation ARPA, loopback not set
 Keepalive set (10 sec)
 ARP type: ARPA, ARP Timeout 04:00:00
 Last input never, output 00:00:09, output hang never
 Last clearing of "show interface" counters never
 Queueing strategy: fifo
 Output queue 0/40, 0 drops; input queue 0/75, 0 drops
 5 minute input rate 0 bits/sec, 0 packets/sec
 5 minute output rate 0 bits/sec, 0 packets/sec
    0 packets input, 0 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
    0 input packets with dribble condition detected
    19 packets output, 2766 bytes, 0 underruns
    0 output errors, 0 collisions, 1 interface resets
    0 babbles, 0 late collision, 0 deferred
    0 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out
unkerich#

Setzen der statischen Routen (Letzter Wert immer auf 1 setzen)

unkerich(config)#ip route 0.0.0.0 0.0.0.0 192.168.240.100 1

Domainname setzen

unkerich(config)#ip domain-name alpha.quadrant 

Nameserver einstellen

unkerich(config)#ip name-server 192.168.240.21

IP einem Hostnamen zu ordnen

unkerich(config)#ip host my-laptop 192.168.250.2

Benutzen von Klassenlosen netzen erlauben

unkerich(config)#ip classless 

Klassenloses Netz mit der Nummer 0 erlauben

unkerich(config)#ip subnet-zero 

Setzen des Telnet Passwortes

 unkerich#configure terminal 
 unkerich(config)#line vty 0 4 
 unkerich(config)#password suxer 
 unkerich(config)#exit
 unkerich#

Setzen des Enable Passwortes

Falls kein enable-passwort vergeben ist, mit

enable password (unverschlüsselt)

oder

enable secret (verschlüsselt)

ein passwort vergeben.

Warmstart des Sytems

unkerich#write memory 
Building configuration...
[OK]
unkerich#

Einstellen der Uhrzeit

unkerich#clock set 14:11:40 18 MAY 2009

Einstellen der Default Sommerzeit

unkerich(config)#clock summer-time MEST recurring last Sunday March 2:00 last Sunday October 3:00 60

Einstellung der Zeitzone

unkerich(config)#clock timezone MEZ 1

Anzeigen der Uhrzeit (detaliert)

unkerich#show clock detail 
16:20:41.014 MEST Mon May 18 2009
Time source is user configuration
Summer time starts 02:00:00 MET Sun Mar 29 2009
Summer time ends 03:00:00 MEST Sun Oct 25 2009

Einstellen des NTP Server

unkerich(config)#ntp server 195.145.119.188 source ethernet 0/0

Webserver aktivieren

unkerich#configure terminal 
unkerich(config)#ip http server 
unkerich(config)#exit
unkerich#