itl getting information: packet sniffing cisco router commands snmp
Post on 14-Jan-2016
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ITL
Getting Information:
Packet Sniffing
Cisco Router Commands
SNMP
(c) 2001, Hans Kruse and Shawn Ostermann 2
Router Command Access
Access is possible via Telnet (usually over Ethernet, Token Ring, etc) SNMP Serial Port
(c) 2001, Hans Kruse and Shawn Ostermann 3
Three Access Levels
Basic Access Display commands Password protected
Privileged Mode – second password Access to all information Reset and reboot commands
Configuration Command Mode
(c) 2001, Hans Kruse and Shawn Ostermann 4
Locating Interfaces
On simple routers Interface type and number
Serial 0, or Ethernet 1
On modular routers Interface Type, slot, and port
Ethernet 0/0Serial 1/1
(c) 2001, Hans Kruse and Shawn Ostermann 5
Getting Help
Help command “?” command Type a partial command followed by “?”
Example “show s?”
(c) 2001, Hans Kruse and Shawn Ostermann 6
Useful things to do
Get information Is an interface up or down? What are the parameters for the interface What are the statistics
Packets/Octets received or sentNumber of errorsQueue length, current occupancy, packets dropped
(c) 2001, Hans Kruse and Shawn Ostermann 7
Looking ahead to next week
Router Configuration Set general parameters Configure each interface Give each interface an address and mask Set up routes
Which interface should the router use for any given address
(c) 2001, Hans Kruse and Shawn Ostermann 8
Documentation/Help
Cisco documentation is on-line http://www.cisco.com Link to technical documentation
Hardware descriptions IOS Command Reference
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