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Routing & Switching Archives - CLI Warriors

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Routing & Switching

How to backup a Cisco Router | Switch Configuration using TFTP

  • J
  • Posted onDec 15, 2018 at 11:05 PM
  • 0 Comments
You can save a Cisco Router or Switch configuration over the network to a TFTP server running on your computer. Solarwinds TFTP server is available for Windows and its FREE.  
Routing & SwitchingSecurity

How to encrypt all Cisco passwords

  • J
  • Posted onDec 15, 2018 at 9:01 PM
  • 0 Comments
Setting the “service password-encryption” will encrypt all passwords in the show running-config Ex. Enable and Line clear text passwords. Passwords are encrypted with the MD5 hashing algorithm. Before applying: service password-encryption Enable: service password-encryption Verification:
eigrp
eigrp
Routing & Switching

Basic EIGRP Configuration | Cisco Router

  • J
  • Posted onNov 3, 2018 at 9:13 PM
  • 0 Comments
Enhanced Interior Gateway Routing Protocol (EIGRP) is an open-standard distance vector protocol developed by Cisco.  Routers running EIGRP must form neighbors before they can begin to exchange routes.  The multicast address for EIGRP communication is over 224.0.0.10.
etherchannel
etherchannel
Routing & Switching

Configure LACP EtherChannel on Cisco Switch

  • J
  • Posted onOct 25, 2018 at 10:21 PM
  • 0 Comments
In this lab we will look at the minimum configuration required to build a redundant and high speed link between two Cisco switches. Configuration Depending on your requirements you will need to use either active or passive. Verification
Configure Telnet on Cisco Router
Configure Telnet on Cisco Router
Routing & SwitchingSecurity

Configure Telnet on Cisco Router

  • J
  • Posted onOct 19, 2018 at 11:01 PM
  • 0 Comments
Telnet allows you to remotely manage a Cisco router over a TCP connection.  Keep in mind that telnet is not secure and everything is transmitted in clear-text.
console password
console password
Routing & SwitchingSecurity

Configure Enable Secret / Console Password and Timeout

  • J
  • Posted onOct 19, 2018 at 4:18 PM
  • 0 Comments
In this lab we will configure the enable secret and console passwords to help secure your routers and switches from unauthorized access.  We will also configure the console timeout to 10 minutes. ConfigurationEnable Secret Password Console password & Timeout Verification
cisco access list acl
cisco access list acl
Routing & SwitchingSecurity

Configure Standard ACL Numbered | Cisco Router

  • J
  • Posted onOct 18, 2018 at 9:51 PM
  • 0 Comments
You can use a Standard Access Control List to allow or deny traffic to a host, network, or any host.  In our example below we will deny traffic from the 20.20.20.0/24 to the 10.10.10.0/24 network Topology used: Router-on-a-stick Configuration VerificationOur pings begin to drop from PC-2 to PC-1 after applying the ACL to interface Gi0/0.20
ospf
ospf
Routing & Switching

Basic OSPF Configuration | Cisco Router

  • J
  • Posted onOct 15, 2018 at 10:58 PM
  • 0 Comments
In this lab we will configure the Open Shortest Path First routing protocol (OSPF) between two routers in the same area.  With OSPF you must use a wildcard mask in your network statements as shown below. CIDR Information OSPF Configuration Verification From the output above we can see that R2 is the Designated Router (DR) …

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ripv2
ripv2
Routing & Switching

RIPv2 Configuration | Cisco Router

  • J
  • Posted onOct 14, 2018 at 2:12 PM
  • 0 Comments
RIP (Routing Information Protocol) is a distance vector protocol which uses Hop Counts (Max 15 hops) as a routing Metric. Default RIPv2 Timers Update – 30 Sec Invalid – 180 Sec Hold Down – 180 Sec Flush – 240 Sec Admin Distance – 120 UDP Port – 520 Authentication – MD5 & Plain Multicast Address …

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gateway of last resort
gateway of last resort
Routing & Switching

Configure Default Static Route (Gateway of last resort) | Cisco Router

  • J
  • Posted onOct 10, 2018 at 10:40 PM
  • 0 Comments
A default static route is required when the destination network is  NOT known by the routing table. When is a default static route required?Stub Networks – Networks with only one exit pointLimited by router resources
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