Configuring Advanced Features

Port-Based Virtual LANs (Static VLANs)

VLAN Restrictions

■A port must be a member of at least one VLAN. In the factory default configuration, all ports are assigned to the default VLAN (DEFAULT_VLAN; VID = 1).

■A port can be assigned to several VLANs, but only one of those assign- ments can be untagged. (The “Untagged” designation enables VLAN oper- ation with non 802.1Q-compliant devices.)

■An external router must be used to communicate between tagged VLANs.

■Duplicate MAC addresses on different VLANs are not supported and can cause VLAN operating problems. These duplicates are possible and com- mon in situations involving Sun workstations with multiple network interface cards, with DECnet routers, and with certain routers where any of the following are enabled:

•IPX

•IP Host-Only

•STP

•XNS

•DECnet

Currently, for the problem of duplicate MAC addresses in XNS and DEC- net environments, a satisfactory solution is not available from any vendor at this time.

N o t e

Operating problems associated with duplicate MAC addresses are likely to

 

occur in VLAN environments where XNS and DECnet are used. For this

 

reason, using VLANs in XNS and DECnet environments is not currently

 

supported.

 

■ Before you can delete a VLAN, you must first re-assign all ports in the

 

 

VLAN to another VLAN.

Symptoms of Duplicate MAC Addresses in VLAN

Environments

There are no definitive events or statistics to indicate the presence of duplicate MAC addresses in a VLAN environment. However, one symptom that may occur is that the duplicate MAC address can be seen in the Port Address Table for more than one port. You can do a search for the suspected MAC address in the switch’s address table and if there is a duplicate MAC address problem, the address will be found in the table associated with one port at one moment, and then later associated with a different port.

Features

Configuring Advanced

 

 

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SMC Networks SMC6624M Vlan Restrictions, Symptoms of Duplicate MAC Addresses in Vlan Environments, IP Host-Only, Supported
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SMC6624M specifications

SMC Networks SMC6624M is a robust and versatile managed switch designed to meet the needs of enterprises seeking reliable network solutions. This device features 24 Gigabit Ethernet ports that allow for high-speed data transfer, making it ideal for environments that demand high bandwidth. The SMC6624M is particularly suited for small to medium-sized businesses that require a powerful network backbone to support various applications, including voice, video, and data transmission.

One of the standout features of the SMC6624M is its Layer 2 and Layer 3 switching capabilities, enhancing the flexibility and efficiency of network management. The switch supports VLANs (Virtual Local Area Networks), which allow administrators to segment network traffic for improved security and performance. This capability is essential for organizations looking to optimize their network resources and apply policies that enhance security.

The SMC6624M also integrates advanced Quality of Service (QoS) features, enabling the prioritization of network traffic. This is particularly useful for applications such as VoIP and video conferencing, where maintaining low latency and jitter is crucial for ensuring a seamless user experience. Users can define traffic classes and manage bandwidth allocation, which helps in maintaining the quality of critical applications even during peak usage times.

In terms of connectivity and performance, the SMC6624M includes 4 Gigabit SFP ports, allowing for fiber optic connections to extend network reach and provide flexibility in deployment. The ability to take advantage of high-speed fiber connections means businesses can scale their networks as needed without significant infrastructure changes.

Management options for the SMC6624M are comprehensive. It supports SNMP (Simple Network Management Protocol) for monitoring and managing network performance effectively. Additionally, the switch can be configured using a web-based interface, command-line interface (CLI), or through SNMP, providing flexibility to network administrators with different preferences and expertise.

Furthermore, the SMC6624M is built with a fanless design, which ensures quiet operation and is energy efficient. Its compact form factor and sturdy build make it suitable for installation in various environments, including data centers and office settings.

Overall, the SMC Networks SMC6624M stands out for its combination of speed, flexibility, and management features, making it an excellent choice for businesses looking to enhance their network infrastructure. With a focus on reliability and performance, this managed switch promises to deliver the capabilities that today's modern networks demand.
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