Difference between revisions of "Cisco IOS"

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[[wikipedia:Cisco:Cisco Internetwork Operating System]] (IOS) is a network operating systems used on Cisco Systems [[switch]]es and [[router]]s.
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[[wikipedia:Cisco IOS|Cisco Internetwork Operating System]] (IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches
  
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== Basic commands ==
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* <code>[[/show version/]]</code> or <code>sh ver</code> (includes [[uptime]] information)
  
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Interfaces:
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* <code>show interfaces</code>
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* <code>show interface trunk</code>
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* <code>show interfaces switchport</code>. To display the administrative and operational status of a switching (nonrouting) port
  
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* <code>[[/show configuration/]]</code> or <code>sh conf</code>
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* <code>[[/show running-config/]]</code> or <code>sh run</code> An enable mode command that displays the current configuration
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* <code>configure terminal</code> or <code>conf t</code> Logs you into configuration mode
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* <code>show ip</code>
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* <code>show ip interface</code>
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** <code>show ip interface brief</code> or <code>sh ip int br</code>
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* <code>enable</code> Logs into enable mode. Also known as user exec mode or privileged mode. See also: <code>show privilege</code>
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** <code>enable 5</code> Change to level 5
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** <code>no enable password</code>
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* <code>show ip traffic</code>
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* <code>[[/show logging/]]</code>
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* <code>[[/no shutdown/]]</code>. Enables an interface (brings it up).
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* <code>ip route-cache</code>
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* <code>no ip route-cache</code>
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* <code>[[Cisco IOS/Configure public RSA key authentication|ip ssh pubkey-chain]]</code>
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* <code>include</code>, similar to <code>[[linux/Basic commands/grep|grep]]</code> linux command
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* <code>show vlan [brief | id <vlan-id> | name <name> [ifindex] | <ifindex>]</code>
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** <code>[[show vlan]]</code>
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** <code>[[show vlan brief]]</code> or <code>[[sh vlan br]]</code>
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** <code>show vlan summary</code> or <code>[[sh vlan s]]</code>
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* <code>[[/aaa new model/]]</code>
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* <code>[[/show ip route/]]</code> or  <code>[[/show ip ro/]]</code>
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* <code>[[/show ip arp/]]</code>
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* <code>[[/show ip ssh/]]</code>
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* <code>show privilege</code>
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* <code>[[/username/]]</code> Create and delete users
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* <code>[[/show users/]]</code>
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* <code>[[/write/]]</code>
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* <code>[[/show crypto ca certificates/]]</code>
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=== Access List ===
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Configuring IP Access Lists: https://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html#acltypes
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Types of ACLs: Standard ACLs, Extended ACLs, Lock and Key (Dynamic ACLs), IP Named ACLs, Reflexive ACLs, Time-Based ACLs Using Time Ranges, Commented IP ACL Entries, Context-Based Access Control, Authentication Proxy, Turbo ACLs, Distributed Time-Based ACLs, Receive ACLs, Infrastructure Protection ACLs, Transit ACLs.
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* <code>show access-list</code>
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* <code>show ip access-list</code>
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* <code>router(config)#access-list 101 deny icmp any any</code>
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* <code>router(config)#access-list 101 permit ip any any</code>
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* <code>router(config)#ip access-list extended test</code>
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* <code>router(config-ext-nacl)#permit ip host 2.2.2.2 host 3.3.3.3</code>
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* <code>router(config-ext-nacl)#permit tcp host 1.1.1.1 host 5.5.5.5 eq www</code>
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* <code>router(config-ext-nacl)#permit icmp any any</code>
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* <code>router(config-ext-nacl)#permit udp host 6.6.6.6 10.10.10.0 0.0.0.255 eq domain</code>
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* <code>ip access-group</code>
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=== HTTP Server ===
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* <code>sh ip http server all</code>
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* <code>R1(config)#ip http authentication local</code>
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* <code>R1(config)#ip http secure-server</code>
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== Configuration Guides ==
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* [[/Cisco IOS DHCP Server configuration/]]
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* [[/Configure public RSA key authentication/]]: <code>[[Cisco IOS/Configure public RSA key authentication|ip ssh pubkey-chain]]</code>
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== Activities ==
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# Read wikipedia article about [[w:Cisco IOS|Cisco Internetwork Operating System]]
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# Read Cisco IOS command reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/command/Cisco_IOS_Configuration_Fundamentals_Command_Reference.pdf
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# Read Cisco IOS Cheat Sheet: https://www.netwrix.com/cisco_commands_cheat_sheet.html
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# Configure a user with public key access [[/Configure public RSA key authentication/]]
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# [[/Associate a user with default higher privileges/]] using <code>[[/username/]]</code> command
  
  
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[[Category:Networking]]
 
[[Category:Networking]]
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{{CC license}} https://en.wikiversity.org/wiki/Cisco_IOS

Revision as of 18:02, 8 December 2019

Cisco Internetwork Operating System (IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches

Basic commands

Interfaces:

  • show interfaces
  • show interface trunk
  • show interfaces switchport. To display the administrative and operational status of a switching (nonrouting) port


  • show ip
  • show ip interface
    • show ip interface brief or sh ip int br
  • enable Logs into enable mode. Also known as user exec mode or privileged mode. See also: show privilege
    • enable 5 Change to level 5
    • no enable password


  • ip route-cache
  • no ip route-cache
  • include, similar to grep linux command

Access List

Configuring IP Access Lists: https://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html#acltypes

Types of ACLs: Standard ACLs, Extended ACLs, Lock and Key (Dynamic ACLs), IP Named ACLs, Reflexive ACLs, Time-Based ACLs Using Time Ranges, Commented IP ACL Entries, Context-Based Access Control, Authentication Proxy, Turbo ACLs, Distributed Time-Based ACLs, Receive ACLs, Infrastructure Protection ACLs, Transit ACLs.

  • show access-list
  • show ip access-list
  • router(config)#access-list 101 deny icmp any any
  • router(config)#access-list 101 permit ip any any


  • router(config)#ip access-list extended test
  • router(config-ext-nacl)#permit ip host 2.2.2.2 host 3.3.3.3
  • router(config-ext-nacl)#permit tcp host 1.1.1.1 host 5.5.5.5 eq www
  • router(config-ext-nacl)#permit icmp any any
  • router(config-ext-nacl)#permit udp host 6.6.6.6 10.10.10.0 0.0.0.255 eq domain


  • ip access-group

HTTP Server

  • sh ip http server all
  • R1(config)#ip http authentication local
  • R1(config)#ip http secure-server

Configuration Guides

Activities

  1. Read wikipedia article about Cisco Internetwork Operating System
  2. Read Cisco IOS command reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/command/Cisco_IOS_Configuration_Fundamentals_Command_Reference.pdf
  3. Read Cisco IOS Cheat Sheet: https://www.netwrix.com/cisco_commands_cheat_sheet.html
  4. Configure a user with public key access /Configure public RSA key authentication/
  5. /Associate a user with default higher privileges/ using /username/ command


See also

Networking: bandwidth, latency, Jitter, Ethernet, UPnP, MPLS, Frame Relay, ATM, TCP/IP, ARP, WiFi, BGP, Networking timeline, Router, Proxy ARP, Services & Networking, Traffic shapper


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