Routing & Switching

The video walks you through SNMPv2 configurations on a Cisco router with most commands being applicable to a Catalyst switch. SNMP Poll and Trap are demonstrated through SNMPB tool and by analyzing packets captured on Wireshark. SNMP is a widely-used protocol for monitoring the health of network devices, and collecting performance statistics.

The video walks you through Syslog configurations on a Cisco router with most commands being applicable to a Catalyst switch. Testing is performed by sending log messages to an external Syslog server. Syslog packets captured on Wireshark are also reviewed. It is recommended to your Syslog messages sent and retained on an external server, whether it is for forensic or regulatory compliance.

Topic includes

• Logging to Console/Buffer/Server
• Syslog Packet Analysis

Quick Facts:

• Syslog uses UDP 514

The video provides recommended router startup configurations (majority also applies to a Catalyst switch) that will tighten your device security and improve your console experience. It is always recommended to disable any unused services on network devices and enforce access-control for administration. 

Topic includes

• Router/Switch Services Disabling
• Password Encryption
• Console Access Management
• Administrative Access-Control

The video explains the benefit of configuration archive and configuration replace used for router configuration management over the 'copy flash: running-config'. This is a convenient way to revert your device configuration to a previously saved copy without having to reload the device.

Topic includes

• Configuration Archive
• Configuration Replace

The video shows how to configure time synchronization on a router and switch using NTP. Two routers will be configured as NTP master/peers, while providing time to a switch. Having an accurate time on your network devices is critical for producing meaningful logging messages needed for troubleshooting, and any network services relying on time accuracy such as certificate-based authentication. 

Topic includes

• Clock Timezone/Daylight Saving
• NTP Server/Peer/Client
• NTP Access-Group
• NTP Authentication

The video presents rudimentary configuration on a router and switch to achieve network connectivity. We will look at various network interface type, the concept of secondary IP, and basic static route. 

Topic includes

The video demonstrates configuration on various type of Back-to-Back T1 based on two WAN Interface Cards: DSU-T1 (service-module) and VWIC (controller t1). This is particularly useful for simulating T1 connectivity in a lab environment.

Topic includes:

• HDLC
• PPP
• Frame Relay
• MLPPP
• PRI