Cisco Switch Grundkonfiguration

Gerätenamen festlegen

• Switch#configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

• Switch(config)#hostname c3750
• c3750(config)#

Enable Secret setzen

• c3750(config)#enable secret sysadm

Localer Admin einrichten

• c3750(config)#username admin privilege 15 secret sysadm
• c3750(config)#username xinux privilege 1 secret oimel

Passwort verschlüsselung unnötig wenn Funktion secret verfügbar ist

• c3750(config)#service password-encryption

Interface VLAN1 konfigurieren

• c3750(config)#interface vlan 1
• c3750(config-if)#ip address 192.168.240.154 255.255.248.0
• c3750(config-if)#no shutdown
• c3750(config-if)#do show ip int vlan1

Vlan1 is up, line protocol is up
  Internet address is 192.168.240.154/21
  Broadcast address is 255.255.255.255
  Address determined by setup command from host 192.168.240.200
  MTU is 1500 bytes

Default Gateway einstellen

• c3750(config)#ip default-gateway 192.168.240.100

Konnectivitäts Test

• c3750#ping 8.8.8.8

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 17/20/25 ms

DNS-Lookup festlegen

• c3750#configure terminal
• c3750(config)#ip name-server 192.168.240.200
• c3750(config)#end
• c3750#ping www.heise.de

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 193.99.144.85, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 25/28/33 ms

oder DNS-Lookup abschalten

• c3750#configure terminal
• c3750(config)#no ip domain-lookup

Domainname festlegen

• c3750(config)#ip domain name xinux.org
• c3750(config)#do ping cardassia

Translating "cardassia"...domain server (192.168.240.200) [OK]

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.244.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/203/1007 ms

NTP-Server festlegen

• c3750#show clock

*00:22:38.744 UTC Mon Mar 1 199

• c3750(config)#ntp server pool.ntp.org

Translating "pool.ntp.org"...domain server (192.168.240.200) [OK]

• c3750#show clock

12:38:52.137 UTC Thu Jan 28 2016

Line con 0 konfigurieren

• c3750(config)#line console 0
• c3750(config-line)#password suxer
• c3750(config-line)#login

Synchrones Logging aktivieren

• c3750(config-line)#logging synchronous
• c3750(config-line)#end

Lines VTY 0 15

• c3750(config)#line vty 0 15
• c3750(config-line)#login local
• c3750(config-line)#logging synchronous

Timeout-Werte anpassen

• c3750(config-line)#exec-timeout 30
• c3750(config-line)#end

Konfiguration sichern

Neu

• c3750#copy running-config startup-config

Destination filename [startup-config]? 
Building configuration...
[OK]

Alt

• c3750#write memory

Building configuration...
[OK]

Telnet Tests

• thomas.will@cardassia ~ $ telnet 192.168.240.154

Trying 192.168.240.154...
Connected to 192.168.240.154.
Escape character is '^]'.

User Access Verification 

Username: admin
Password: 
c3750#
c3750#exit

• thomas.will@cardassia ~ $ telnet 192.168.240.154

Trying 192.168.240.154...
Connected to 192.168.240.154.
Escape character is '^]'.

User Access Verification 

Username: xinux
Password: 
c3750>
c3750>exit