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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter1 Overview
Features
–
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 beca use 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 al te rnat ive to STP for ba sic li nk
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 80 2.1Q sta ndard
•VLAN Query Protocol (VQP) for dynamic VLAN membership
•Inter-Switch Link (ISL) and IEEE 802.1Q trunking encapsulation on al l po rts for net work m oves,
adds, and changes; management and control of broadcast and multicast traffi c; and net work secur ity
by establishing VLAN groups for high-security users and network resou rc es
•Dynamic Trunking Protocol (DTP) for negotiating trunking on a link betwee n two d evices and fo r
negotiating the type of trunking encapsulation (IEEE 802.1Q or ISL) t o 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 auth enti ca tio n ( MDA) to allow a dyna mic
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 Lay er 2 ports to be isolated from other ports on the switch
•Port security on a PVLAN host to limit the number of MAC addresses l earn ed on a p ort, or d efine
which MAC addresses may be learned on a port
•VLAN Flex Link Load Balancing to provide Layer 2 redundancy without requirin g Sp an ning Tree
Protocol (STP). A pair of interfaces configured as primary and backup links can load balance traffic
based on VLAN.