Extreme networks Summit X450 Stacking Cable, 1.5 m 16107 Data Sheet

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Summit X450e Series—Page 2

Summit X450e switches allow each of 
the many applications—such as Open 
Shortest Path First (OSPF) and 
Spanning Tree Protocol (STP)—to run 
as separate Operating System (OS) 
processes that are protected from each 
other. This drives increased system 
integrity and inherently protects against 
Denial of Service (DoS) attacks.  

The ExtremeXOS modular OS dramatically 
increases network availability using process 
monitoring and restart. Each independent 
OS process is monitored in real time. If a 
process becomes unresponsive or stops 
running, it can be automatically restarted. 

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). 

EAPS allows the IP network to provide 
the level of resiliency and uptime that 

users expect from their traditional voice 
network. EAPS is superior to Spanning 
Tree or Rapid Spanning Tree protocols and 
offers sub-second (less than 50 millisec-
onds) recovery that delivers 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. 

Summit X450e 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.  

Software-enhanced availability allows users 
to remain connected to the network even if 
part of the network infrastructure is down. 
Summit X450e switches continuously check 
for problems in the uplink connections using 
advanced Layer 3 protocols such as OSPF, 
VRRP and ESRP (ESRP supported in   
Layer 2 or Layer 3), and dynamically routes 
traffic around the problem. 
 

Equal Cost Multipath (ECMP) routing allows 
uplinks to be load balanced for performance 
and cost savings while also supporting 
redundant failover. If an uplink fails, traffic is 
automatically routed to the remaining 
uplinks and connectivity is maintained.  

Link aggregation allows trunking of up to 
eight links on a single logical connection, for 
up to 20 gigabits per second (Gbps) of 
redundant bandwidth per logical connection.  

Summit X450e offers dual stacking 
interfaces to provide high-speed 40 Gbps 
stacking bandwidth. SummitStack stacking 
architecture is designed to support 
converged services such as VoIP and video 
by its highly available, rapid failover 
capability with n-1 master redundancy, 
distributed Layer 2 and Layer 3 switching, 
link aggregation across the stack and 
distributed uplinks. SummitStack supports 
up to eight units in a stack and the mixture 
of the units can be Summit X250e,  
Summit X450e, Summit X450a,  
Summit X480, and Summit X650 switches. It 
provides sub-second failover for path failure 
and hitless master/backup failover along 
with hitless protocol support such as OSPF 
graceful restart, PoE configuration and 
Network Login user authentication. 

Summit X450e provides chassis-like 
management and availability with its 
SummitStack stacking technology    
(see Figure 2).