HP V1910 Switch Series User Manual

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Although RSTP supports rapid network convergence, it has the same drawback as STP—All bridges
within a LAN share the same spanning tree, so redundant links cannot be blocked based on VLAN, and
the packets of all VLANs are forwarded along the same spanning tree.
MSTP features
Developed based on IEEE 802.1s, MSTP overcomes the shortcomings of STP and RSTP. In addition to
supporting for rapid network convergence, it also provides a better load sharing mechanism for
redundant links by allowing data flows of different VLANs to be forwarded along separate paths.
MSTP includes the following features:
 MSTP supports mapping VLANs to MST instances (MSTIs) by means of a VLAN-to-MSTI mapping
table. MSTP can reduce communication overheads and resource usage by mapping multiple
VLANs to one MSTI.
 MSTP divides a switched network into multiple regions, each containing multiple spanning trees
that are independent of one another.
 MSTP prunes a loop network into a loop-free tree, avoiding proliferation and endless cycling of
packets in a loop network. In addition, it provides multiple redundant paths for data forwarding,
supporting load balancing of VLAN data.
 MSTP is compatible with STP and RSTP.
MSTP basic concepts
Assume that all the four devices in Figure 164 are running MSTP. This section explains some basic
concepts of MSTP based on the figure.

HP V1910 Switch Series Specifications

General

Product Series	V1910
VLAN Support	Yes
QoS	Yes
Ports	8, 24, or 48 10/100/1000 ports
MAC Address Table Size	8K entries
Power Supply	Internal power supply
Jumbo Frame Support	Yes
Operating Humidity	10% to 90% (non-condensing)