HP proliant bl e-class Manual De Usuario

The ProLiant BL e-Class C-GbE Interconnect Switch supports the following technologies.  

The ProLiant BL e-Class C-GbE Interconnect Switch uses 10/100/1000 Gigabit Layer 2 
switching technology. Layer 2 refers to the Data Link layer of the Open Systems 
Interconnection (OSI) model, which is concerned with moving data packets across a network 
by enforcing Carrier Sense Multiple Access with Collision Detection (CSMA/CD). This layer 
performs: 

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Ethernet packet framing 

MAC addressing 

Physical medium transmission error detection 

Medium allocation (collision avoidance) 

Contention resolution (collision handling)  

Layer 2 switch technology allows the interconnect switch to look into data packets and 
redirect them based on the destination MAC address. This technology reduces traffic 
congestion on the network, because packets, instead of being transmitted to all ports, are 
transmitted to the destination port only. 

The ProLiant BL e-Class C-GbE Interconnect Switch provides support for a total of 255 
IEEE 802.1Q Virtual Local Area Networks (VLANs) (including user configurable and/or 
dynamic registered), for server grouping and isolation. A VLAN is a network segment 
configured according to a logical scheme rather than a physical layout. VLANs can be used 
to combine any collection of LAN segments into an autonomous user group that appears as a 
single LAN. VLANs also logically segment the physical network into different broadcast 
domains so that packets are forwarded only between ports within the VLAN. This technology 
enhances performance by conserving bandwidth and improves security by limiting traffic to 
specific domains. 

 

IMPORTANT:  The greater the number of VLANs, the greater the interconnect switch CPU utilization. 
For maximum interconnect switch performance, HP recommends that you be judicious when 
configuring the number of VLANs. 

The interconnect switch supports Spanning Tree Protocol (STP), which allows the blocking 
of links that form loops between switches in a network. When multiple links between 
switches are detected, a primary link is established. Duplicated links are blocked from use 
and become standby links. If the primary link fails, the standby link is activated. Refer to 
Appendix D for more information.