© 2009 Extreme Networks, Inc. All rights reserved.
Summit X350 Series—Page 3
Extreme Networks Data Sheet
Voice-Class Availability
Modular Operating System to
Help Maximize Uptime
True Preemptive Multitasking and
Protected Memory
Summit X350 switches allow each of the
many applications—such as Spanning Tree
Protocol (STP)—to run as separate
operating system processes that are
protected from each other. This drives
increased system integrity and helps
protect against Denial of Service (DoS)
attacks.
Process Monitoring and Restart
ExtremeXOS operating system improves
network availability using process
monitoring and restart. Each independent
operating system is monitored in real time.
If a process becomes unresponsive or stops
running, it can be automatically restarted.
Loadable Software Modules
The modular design of ExtremeXOS
allows the upgrading of individual
software modules, should this be necessary,
leading to higher availability in the network
(see Figure 1).
High Availability
Network Protocols
Ethernet Automatic Protection
Switching (EAPS)
EAPS allows the IP network to provide the
level of resiliency and uptime that users
expect from their traditional voice network.
EAPS differs from Spanning Tree and Rapid
Spanning Tree protocols, offering sub-second
(less than 50 milliseconds) recovery that helps
deliver consistent failover regardless of the
number of VLANs, network nodes or network
topology. Since EAPS allows the network to
recover almost transparently, VoIP calls do
not drop and digital video feeds do not freeze
or pixelize in most situations.
Spanning Tree/Rapid Spanning
Tree Protocols
Summit X350 switches support Spanning
Tree (802.1D), Per VLAN Spanning Tree
(PVST+), Rapid Spanning Tree (802.1w)
and Multiple Instances of Spanning Tree
(802.1s) protocols for Layer 2 resiliency.
Link Aggregation (802.3ad)
Link aggregation allows trunking of up to
eight links on a single logical connection,
for up to 20 Gbps (10Gbps x 2) of redundant
bandwidth per logical connection.
Exceptional Policy-based
QoS with Advanced Traffic
Management for Converged
Applications
Summit X350 provides eight hardware
queues per port to support granular traffic
classification with bandwidth allocation. The
1,024 centralized classifiers per 24-port block
can use information from Layers 1 through 4
to prioritize and meter incoming packets at
line-rate. When metering traffic, the switch
can drop out-of-spec traffic or flag it for later
action. To expedite upstream traffic handling,
a packet’s classification can be carried
forward with Layer 2 (802.1p) and Layer 3
(Diffserv) markings. Summit X350 switches
provide advanced traffic management
features that support the high-quality triple
play of voice, video and data services.
Redundant Power Supplies
Summit X350 switches are designed with an
external redundant power supply that offers
a convenient and easy-to-upgrade in-field
option to protect against power anomalies.
Powered by the ExtremeXOS operating system, the Summit X350 switch supports process recovery and application upgrades
without the need for a system reboot. Summit X350 offers the high network availability required for converged applications.
Configuration Management
(CLI/SNMP/XML/Scripts)
ExtremeXOS Application Modules
ExtremeXOS Kernel-Loadable Modules
ExtremeXOS Kernel
Hardware Abstraction Layer
Hardware
sFlow
SSH2
OSPF
VRRP
Network
Login
802.1x
STP
EAPS
ESRP
Figure 1: ExtremeXOS
Modular Design
