SwitchRouter Architectures by Dr. James Aweya

Author:Dr. James Aweya [Dr. James Aweya]
Language: eng
Format: epub
Publisher: Wiley-IEEE Press
Published: 2018-06-05T16:00:00+00:00

Layer 3 (Routed) Ports: These ports are configured to behave like traditional router ports.

VLAN Interface (or Switch Virtual Interface (SVI)): This interface provides a connection between a Layer 3 routing process and an attached switched VLAN (a Layer 2 bridged access to a VLAN).

The Catalyst 3550 supports a number of security features to prevent unauthorized access to it. Access can be via issuing passwords on a console and VTY lines, username/password pairs stored locally on the Catalyst 3550 for individual access, and username/password pairs stored on a centrally located TACACS+ or RADIUS server. A virtual teletype (VTY) is a CLI implemented in a device that facilitates accessing it via Telnet, for example.

Privilege levels can also be configured for passwords where a user can be granted access at a predefined privilege level when the user enters the correct password. To support the ability to give different levels of configuration capabilities to different network managers, the Catalyst 3500 has 15 levels of authorization on the switch/router console and 2 levels on a Web-based management interface.

The Catalyst 3550 support a wide range of security features (e.g., Secure Shell (SSH), Simple Network Management Protocol version 3 (SNMPv3), Kerberos) that protect administrative and network management traffic from tampering or eavesdropping. The switch/router supports features and protocols that can encrypt administrative and network management information to allow secure communications with users and other devices.

Secure Shell (SSH): SSH encrypts administration traffic during Telnet sessions while the network administrator configures or troubleshoots the switch.

SNMPv3 (with Crypto Support): Provides network security by encrypting network administrator traffic during SNMP sessions to configure and troubleshoot the switch.

Kerberos: Provides strong authentication for users and network services using a trusted third party to perform secure verification.

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