NETGEAR GS310TP User Manual

Configuration Examples
336
S350 Series 8-Port Gigabit Ethernet Smart Managed Pro Switch Models GS308T and GS310TP
Multiple Spanning Tree Protocol
Spanning Tree Protocol (STP) runs on bridged networks to help eliminate loops. If a bridge
loop occurs, the network can become flooded with traffic. IEEE 802.1s Multiple Spanning
Tree Protocol (MSTP) supports multiple instances of spanning tree to efficiently channel
VLAN traffic over different interfaces. Each instance of the spanning tree behaves in the
manner specified in IEEE 802.1w, Rapid Spanning Tree, with slight modifications in the
working but not the end effect (chief among the effects is the rapid transitioning of the port to
the forwarding state).
The difference between the RSTP and the traditional STP (IEEE 802.1D) is the ability to
configure and recognize full-duplex connectivity and ports that are connected to end stations,
resulting in rapid transitioning of the port to the Forwarding state and the suppression of
Topology Change Notification. These features are represented by the parameters
pointtopoint and edgeport. MSTP is compatible to both RSTP and STP. It behaves in a way
that is appropriate for STP and RSTP bridges.
An MSTP bridge can be configured to behave entirely as a RSTP bridge or an STP bridge.
So, an IEEE 802.1s bridge inherently also supports IEEE 802.1w and IEEE 802.1D.
The MSTP algorithm and protocol provide simple and full connectivity for frames assigned to
any VLAN throughout a bridged LAN comprising arbitrarily interconnected networking
devices, each operating MSTP, STP, or RSTP. MSTP allows frames assigned to different
VLANs to follow separate paths, each based on an independent Multiple Spanning Tree
Instance (MSTI), within Multiple Spanning Tree (MST) regions composed of LANs and or
MSTP bridges. These regions and the other bridges and LANs are connected into a single
Common Spanning Tree (CST). (IEEE DRAFT P802.1s/D13)
MSTP connects all bridges and LANs with a single Common and Internal Spanning Tree
(CIST). The CIST supports the automatic determination of each MST region, choosing its
maximum possible extent. The connectivity calculated for the CIST provides the CST for
interconnecting these regions, and an Internal Spanning Tree (IST) within each region.
MSTP ensures that frames with a VLAN ID are assigned to one and only one of the MSTIs or
the IST within the region, that the assignment is consistent among all the networking devices
in the region, and that the stable connectivity of each MSTI and IST at the boundary of the
region matches that of the CST. The stable active topology of the bridged LAN with respect to
frames consistently classified as belonging to any VLAN thus simply and fully connects all
LANs and networking devices throughout the network, though frames belonging to different
VLANs can take different paths within any region, per IEEE DRAFT P802.1s/D13.
All bridges, whether they use STP, RSTP, or MSTP, send information in configuration
messages through Bridge Protocol Data Units (BPDUs) to assign port roles that determine
each port’s participation in a fully and simply connected active topology based on one or
more spanning trees. The information communicated is known as the spanning tree priority
vector. The BPDU structure for each of these different protocols is different. An MSTP bridge
transmits the appropriate BPDU depending on the received type of BPDU from a particular
port.

NETGEAR GS310TP Specifications

General

Power connector	DC-in jack
SFP module slots quantity	2
Installed SFP modules quantity	0
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	8
Output current	1.25 A
Output voltage	54 V
Power consumption (max)	69.3 W
MAC address table	8000 entries
Jumbo frames support	Yes
Total Power over Ethernet (PoE) budget	55 W
Memory type	DDR-SDRAM
Flash memory	32 MB
Internal memory	128 MB
Processor frequency	500 MHz
Mean time between failures (MTBF)	1081119 h
Switch type	Managed
Switch layer	L2
DHCP features	DHCP client
Authentication	Auto VLAN, Guest VLAN, MAC-based authentication, Port-based authentication, Web-based authentication
Authentication type	HWTACACS+, IEEE 802.1x
Security algorithms	802.1x RADIUS, EAP, HTTPS, SSL/TLS
Access Control List (ACL) IPv4 entries	100
Stackable	-
Product color	Black
Rack mounting	No
Number of fans	0 fan(s)
Number of VLANs	64
Networking standards	IEEE 802.1D, IEEE 802.1ab, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3at, IEEE 802.3az, IEEE 802.3x
Virtual LAN features	Voice VLAN
Operating temperature (T-T)	0 - 40 °C
Number of multicast groups filtered	256
Harmonized System (HS) code	85176990

Weight and Dimensions

Depth	101 mm
Width	263 mm
Height	30 mm
Weight	610 g