Various

These items will probably get their own pages at one point.

Uses V.35 connector!

Good things to know:

• Work on blocks of ranges with a comma separator:

• Switch(config)#interface range fastEthernet 0/1-5, fastEthernet 0/10-15

• Clear port-sec macs? Supposedly removes ERR DISABLED states as mentioned in a Crouthamel video. Test this:

• Switch#clear port-security all

• Violation Modes:
  • Shutdown:
    • Shutdown the port to ERR DISABLED on violation.
  • Protect:
    • Ignore MAC traffic not configured in port-sec.
    • AKA don't count 3rd machine's traffic if only a max of 2 addresses on the port.
  • Restrict:
    • Same as protect but throws a message to the console.

Default switchport mode appears to be dynamic auto.

• Dynamic:
  • Auto: Will comply with trunk requests
  • Desirable: Will comply AND initiate trunk requests.
• Trunk: Will act as trunk.
• Access: Will act as access (no trunking).

Speed and Duplex are auto-negotiated by default. These commands also work on routers. Manually configure them with:

Switch(config-if)#speed ?
  10    Force 10 Mbps operation
  100   Force 100 Mbps operation
  auto  Enable AUTO speed configuration
  
Switch(config-if)#duplex ?
  auto  Enable AUTO duplex configuration
  full  Force full duplex operation
  half  Force half-duplex operation

Re-enable auto-negotiation by removing the configured speed/duplex:

Switch(config-if)#no duplex
Switch(config-if)#no speed

I'll update these as I come across them.

SW1# show interfaces description
SW1# show interfaces switchport
SW1# show interfaces status
SW1# show port-security interface fa0/1

R1# sh ip route connected OR ospf OR eigrp

Open Systems Interconnection model, 7 layers.

• “All people seem to need data processing.” – Top to bottom
• “Please do not throw sausage pizza away.” – Bottom to top.

• Application
• Presentation
• Session
• Transport
• Network
• Data-link
• Physical