Cisco IOS Cheat Sheet – CATALYST COMMANDS

SWITCH ADDRESS:

· Config# ip address 192.168.10.2 255.255.255.0

· Config# ip default-gateway 192.168.10.1

DUPLEX MODE:

· Config# interface Ethernet 0/5 – “fastethernet” for 100 Mbps ports

· Config-if# duplex full – also, half | auto | full-flow-control

SWITCHING MODE:

· Config# switching-mode store-and-forward – also, fragment-free

MAC ADDRESS CONFIGS:

· Config# mac-address-table permanent aaab.000f.ffef e0/2 – only this mac will work on this port

· Config# mac-address-table restricted static aaab.000f.ffef e0/2 e0/3
-port 3 can only send data out port 2 with that mac
-very restrictive security

· Config-if# port secure max-mac-count 5 – allows only 5 mac addresses mapped to this port

VLANS:

· Config# vlan 10 name FINANCE

· Config# interface Ethernet 0/3

· Config-if# vlan-membership static 10

TRUNK LINKS:

· Config-if# trunk on – also, off | auto | desirable | nonegotiate

· Config-if# no trunk-vlan 2
-removes vlan 2 from the trunk port
-by default, all vlans are set on a trunk port

CONFIGURING VTP:

· Config# delete vtp – should be done prior to adding to a network

· Config# vtp server – the default is server, also client and transparent

· Config# vtp domain Camp – name doesn’t matter, just so all switches use the same

· Config# vtp password 1234 – limited security

· Config# vtp pruning enable – limits vtp broadcasts to only switches affected

· Config# vtp pruning disable

FLASH UPGRADE:

· Config# copy tftp://192.5.5.5/configname.ios opcode – “opcode” for ios upgrade, “nvram” for startup config

DELETE STARTUP CONFIG:

· Config# delete nvram

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