Dell POWEREDGE M1000E - Manual (Page 58)

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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
OL-13270-03
Chapter 1 Overview
Features
• Optional spanning-tree features available in PVST+, rapid-PVST+, and MSTP mode:
– Port Fast for eliminating the forwarding delay by enabling a port to immediately change from
the blocking state to the forwarding state
– BPDU guard for shutting down Port Fast-enabled ports that receive bridge protocol data units
(BPDUs)
– BPDU filtering for preventing a Port Fast-enabled port from sending or receiving BPDUs
– Root guard for preventing switches outside the network core from becoming the spanning-tree
root
– Loop guard for preventing alternate or root ports from becoming designated ports because of a
failure that leads to a unidirectional link
• Equal-cost routing for link-level and switch-level redundancy
• Flex Link Layer 2 interfaces to back up one another as an alternative to STP for basic link
redundancy
• Link-state tracking to mirror the state of the ports that carry upstream traffic from connected hosts
and servers and to allow the failover of the server traffic to an operational link on another Cisco
Ethernet switch
VLAN Features
These are the VLAN features:
• Support for up to 1005 VLANs for assigning users to VLANs associated with appropriate network
resources, traffic patterns, and bandwidth
• Support for VLAN IDs in the 1 to 4094 range as allowed by the IEEE 802.1Q standard
• VLAN Query Protocol (VQP) for dynamic VLAN membership
• Inter-Switch Link (ISL) and IEEE 802.1Q trunking encapsulation on all ports for network moves,
adds, and changes; management and control of broadcast and multicast traffic; and network security
by establishing VLAN groups for high-security users and network resources
• Dynamic Trunking Protocol (DTP) for negotiating trunking on a link between two devices and for
negotiating the type of trunking encapsulation (IEEE 802.1Q or ISL) to be used
• VLAN Trunking Protocol (VTP) and VTP pruning for reducing network traffic by restricting
flooded traffic to links destined for stations receiving the traffic
• Voice VLAN for creating subnets for voice traffic from Cisco IP Phones
• Dynamic voice virtual LAN (VLAN) for multidomain authentication (MDA) to allow a dynamic
voice VLAN on an MDA-enabled port
• VLAN 1 minimization for reducing the risk of spanning-tree loops or storms by allowing VLAN 1
to be disabled on any individual VLAN trunk link. With this feature enabled, no user traffic is sent
or received on the trunk. The switch CPU continues to send and receive control protocol frames.
• Private VLANs to address VLAN scalability problems, to provide a more controlled IP address
allocation, and to allow Layer 2 ports to be isolated from other ports on the switch