SysAdmin

General Commands

• show run - shows the current (running) configuration
• show config - shows the saved (startup) configuration
• show int bri - quick status of all interfaces
• show int eth 18 - detailed information on interface ethernet 18
• show vlan - shows VLAN information and port association
• show log - shows the log
• show mac-address - shows the mac addresses
• exit - leave the current mode

Configuration commands

• enable - needed to make changes
• conf t - go from exec to configuration mode
  • int eth 18 - go into interface editing mode for ethernet 18
  • port-name - set port name for a port
  • no port-name - erase the port's name
  • enable - enable the interface
  • disable - disable the interface
• vlan 902 - go into vlan editing mode for vlan 902
  • untag eth 18 - add interface 18 to this vlan as an untagged port
  • tag eth 18 - add interface 18 to this vlan as a tagged port
  • no untag eth 18 - remove interface 18 from this vlan when it was an untagged port
• write mem - write the current configuration to flash

Creating a VLAN
vlan <vlan #> name <name of vlan> by port

• vlan 666 name cursed-vlan by port

Adding ports to a VLAN
First edit the vlan, with vlan 666

• enable
• conf t
  • vlan 666
  • untagged ethe 25 to 28 - this would add ports 25 through 28 inclusive to vlan numbered 666

Misc things

• how to grep for something

| include

example to output lines in the config containing "mail". Note this doesn't seem to be available in older code versions.

sh run | include mail

• find which vlan's your port is using

show vlan eth 0/1/16

Load balancer commands

• show server real - shows state and stats of real servers
• show server virtual - shows state and stats of virtual servers
• show server - shows quick status of all virtual and real servers

Load balancer configuration

• server real host1 - go into real server editing mode for real server host1
  • port smtp - add smtp port on this host
  • port smtp disable - remove smtp port from this host
• server virtual virtualhost - go into virtual server editing mode for virtual server virtualhost
  • bind smtp host1 smtp - bind the smtp port on real host host1 to this virtual server
  • no bind smtp host1 smtp - unbind the smtp port on real host host1 from this virtual server

Deleting servers and virtual servers

• no server real foo - deletes server foo
• no server virtual foo - deletes VIP foo

Example load balancer configuration
First add the real hosts. We'll use real hosts mailhost1 and mailhost2 and a proto of smtp in this example:

[codesyntax lang="bash"]

server real mailhost1 1.2.3.3
 port default disable
 port smtp
 port smtp keepalive

server real mailhost2 1.2.3.4
 port default disable
 port smtp
 port smtp keepalive

[/codesyntax]

Then add the virtual host(s):
[codesyntax lang="bash"]

server virtual mailhost 1.2.3.5
 predictor least-conn
 port default disable
 port smtp
 bind smtp mailhost1 smtp mailhost2 smtp

[/codesyntax]

This creates a virtual server called mailhost listening on IP address 1.2.3.5. The VIP listens on the SMTP port and passes SMTP traffic to the real servers, mailhost1 and mailhost2.