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VLANs
VLANs allow PCs, workstations, and other resources, including printers and file servers, to be organized into logical, broadcast domains so that only devices within the same domain can commu- nicate with each other. 3Com switches allow users to implement VLANs on their network using one of two schemes: IEEE 802.1Q, including GVRP, which enables the
automatically enable a second port buffer for
Traffic Management
Flow control
Flow control is an essential switch feature that eliminates dropped packets on congested ports. To provide switch application flexibility, 3Com switches support flow control schemes suited to both full- and
Broadcast traffic control
Traditional Ethernet switches suffer from the threat of broadcast storms that can potentially bring networks to a halt. However, all SuperStack II switches can be configured with broadcast storm protection to limit the number of broadcast packets allowed to be forwarded by each port. This allows the SuperStack II switches to offer the security of broadcast storm protection normally associated with a router while also providing the protocol independence of a switch.
Network Availability
Backup power supplies
3Com gives you all the choices you need to ensure constant power to your stackable switches. Both the Advanced Redundant Power System (ARPS) and the Uninterruptible Power System (UPS) work with any SuperStack II switch. The ARPS is ideally suited as a backup for individual power supplies in the SuperStack II units. The UPS fully protects your SuperStack II system from the effects of brownouts or spikes that occur in outside power lines.
Resilient links
3Com’s simple and flexible resilient links technology ensures fault tolerance via redundant connections to other network devices.
Spanning tree
Support for the
Port trunking
Port trunking establishes backbone links by treating multiple parallel links as a single network pipe. Trunking also provides link redundancy; traffic on any failed link comprising a network trunk automatically switches over to the other links in the trunk.
knowledge via the GVRP protocol. Switches supporting both VLAN
schemes can be used to provide seamless migration from VLT to IEEE 802.1Q environments that preserve investment in current LAN developments and equipment.
Layer 3 Support
Multicast filtering using IGMP snooping
Multicast filtering enables the automatic configuration of filters for IP multicast traffic, such as video and audio broad- casts, allowing advanced multimedia applications to be delivered easily to the workgroup.
Fast IP
Fast IP is 3Com’s
This reduces traffic flow through router bottlenecks and maximizes performance by utilizing the switched infrastructure.
Layer 3 switching
Layer 3 switching is the implementation of routing protocols in
L A N S w i t c h e s
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