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Dell S4048T User Manual

Dell S4048T
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The default is 15 seconds.
Change the hello-time parameter.
PROTOCOL SPANNING TREE RSTP mode
hello-time seconds
NOTE: With large configurations (especially those configurations with more ports) Dell Networking
recommends increasing the hello-time.
The range is from 1 to 10.
The default is 2 seconds.
Change the max-age parameter.
PROTOCOL SPANNING TREE RSTP mode
max-age seconds
The range is from 6 to 40.
The default is 20 seconds.
To view the current values for global parameters, use the show spanning-tree rstp command from
EXEC privilege mode.
Enabling SNMP Traps for Root Elections and
Topology Changes
To enable SNMP traps, use the following command.
Enable SNMP traps for RSTP, MSTP, and PVST+ collectively.
snmp-server enable traps xstp
Modifying Interface Parameters
On interfaces in Layer 2 mode, you can set the port cost and port priority values.
Port cost — a value that is based on the interface type. The previous table lists the default values. The
greater the port cost, the less likely the port is selected to be a forwarding port.
Port priority — influences the likelihood that a port is selected to be a forwarding port in case that
several ports have the same port cost.
To change the port cost or priority of an interface, use the following commands.
Change the port cost of an interface.
INTERFACE mode
spanning-tree rstp cost cost
The range is from 0 to 65535.
Rapid Spanning Tree Protocol (RSTP) 898

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Dell S4048T Specifications

General IconGeneral
Switching Capacity1.44 Tbps
Rack Units1U
Form FactorRack-mountable
Power DeviceInternal power supply
Power RedundancyOptional
Product TypeSwitch
Jumbo Frame SupportYes
Routing ProtocolOSPF, BGP, RIP, VRRP, PIM-SM, IGMP
Remote Management ProtocolSNMP, RMON, Telnet, SSH
FeaturesQuality of Service (QoS), Jumbo Frames Support, Virtual Route Redundancy Protocol (VRRP), VLAN support, sFlow, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), IPv6 support
Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3ae
Dimensions (W x D x H)17.3 in x 16 in x 1.7 in
Operating Temperature0°C to 40 °C
Operating Humidity10% to 90% (non-condensing)

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