Shamefully taken from https://www.eng.uwaterloo.ca/twiki/bin/view/Engcomp/CommonCiscoCommands
To enable privileged command mode
enable
To enter switch configuration mode (from privileged command mode)
configure terminal
To enter port configuration mode (from switch configuration mode)
interface FastEthernet0/5
To return from one mode to the previous mode
exit
To show the mac table
show mac-address-table
To show port information
show interfaces
To show the switch version
show version
To save the configuration
write memory
To show the configuration
show running-config
To set the port description of FastEthernet0/5 to “engmail”
configure terminal interface FastEthernet0/5 description engmail exit
To remove the port description from FastEthernet0/5
configure terminal interface FastEthernet0/5 no description exit
To set FastEthernet0/5 to 100/full
configure terminal interface FastEthernet0/5 speed 100 duplex full exit
To set FastEthernet0/5 to auto/auto
configure terminal interface FastEthernet0/5 speed auto duplex auto exit
To turn FastEthernet0/5 into a dot1q trunk
configure terminal interface FastEthernet0/5 no switchport access vlan switchport mode trunk switchport trunk encapsulation dot1q exit
To turn FastEthernet0/5 into a non trunk
configure terminal interface FastEthernet0/5 no switchport mode trunk no switchport trunk encapsulation no switchport trunk allowed vlan no switchport trunk native vlan switchport mode access exit
To set the allowed vlans on trunk port FastEthernet0/5 to 20,50,100
configure terminal interface FastEthernet0/5 switchport trunk allowed vlan 20,50,100 exit
To remove the allowed vlans from trunk port FastEthernet0/5 (will default to all vlans in vlan database)
configure terminal interface FastEthernet0/5 no switchport trunk allowed vlan exit
To restrict the number of mac address on FastEthernet0/5 to 1
2900/3500 series…
configure terminal interface FastEthernet0/5 port security max-mac-count 1 exit
2950/3550 series…
conf term interface FastEthernet0/5 switchport port-security switchport port-security maximum 1 switchport port-security violation protect switchport port-security mac-address sticky switchport port-security aging static exit
To remove the mac address restriction from FastEthernet0/5
configure terminal interface FastEthernet0/5 no port security exit
To set the vlan on FastEthernet0/5 to 150
configure terminal interface FastEthernet0/5 switchport access vlan 150 exit
To remove the vlan from FastEthernet0/5 (port will default to vlan 1)
configure terminal interface FastEthernet0/5 no switchport access vlan exit
To set the native vlan (untagged vlan) on trunk FastEthernet0/5 to 75
configure terminal interface FastEthernet0/5 switchport trunk native vlan 75 exit
To remove the native vlan (untagged vlan) from trunk FastEthernet0/5
configure terminal interface FastEthernet0/5 no switchport trunk native vlan exit
To set FastEthernet0/5 to portfast
configure terminal interface FastEthernet0/5 spanning-tree portfast exit
To set FastEthernet0/5 to not be portfast
configure terminal interface FastEthernet0/5 no spanning-tree portfast exit
To disable spanning tree on vlan 20
configure terminal no span vlan 20 exit
To enable spanning tree on vlan 20
configure terminal span vlan 20 exit
To disable port FastEthernet0/5
configure terminal interface FastEthernet0/5 shutdown exit
To enable port FastEthernet0/5
configure terminal interface FastEthernet0/5 no shutdown exit
To get a GBIC port to talk to a BayStack
configure terminal interface GigabitEthernet0/2 no negotiation auto exit
IOS upgrade (general procedure)
Important. Read the Cisco documentation. This procedure is minimal, and does not install the web management interface. Do not follow these instructions unless you are familliar with the procedure.
dir flash:
delete the html directory, and diag file (if any)
delete flash:html/*
rename the existing image to the name of the new image
rename flash:c3500XL-c3h2s-mz.120-5.WC2.bin flash:c3500xl-c3h2s-mz.120-5.WC5a.bin conf term boot system flash:c3500xl-c3h2s-mz.120-5.WC5a.bin exit copy tftp://129.97.x.y/tmpdata/c3500xl-c3h2s-mz.120-5.WC5a.bin flash:c3500xl-c3h2s-mz.120-5.WC5a.bin copy flash:c3500xl-c3h2s-mz.120-5.WC5a.bin tftp://129.97.x.y/tmpdata/junk
check the md5 on junk compared to c3500xl-c3h2s-mz.120-5.WC5a.bin before doing the reload
write mem reload
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