10 Gigabit Ethernet at the Edge–When You Need It
The Summit 400-48t delivers the industry’s first fixed
configuration edge switch with multiple 10 gigabit uplinks so
the edge switch uplink capacity can grow as the end user’s
bandwidth demands grow. Based on a modular design, an optional
10 gigabit “daughter card” can be added to the Summit 400-48t
delivering immediate support for two 10 gigabit XENPAK I/O
modules. This advanced design enables the user to easily upgrade
the Summit 400- 48t to multiple 10 gigabit uplinks when added
uplink capacity is required.
160 Gbps Switch Fabric
The Summit 400-48t delivers industry-leading switch fabric and
throughput performance giving users the bandwidth their
applications require. The Summit 400-48t switch fabric has a 160
gigabits per second (Gbps) capacity supporting 101 million
packets per second, making it the industry’s highest performance
fixed configuration edge switch. This industry-leading
performance ensures that the Summit 40048t will have the
capacity to support ever-growing end user bandwidth
requirements. The Summit 400-48t two 10 gigabit uplinks, its
high-performance switch fabric and 101 Mpps throughput ensure
that the Summit 400-48t will continue to be a critical edge
solution in the customer’s network for years to come.
Small, Medium, Large Networks Supported
The Summit 400-48t supports up to 16,000 MAC addresses, 4,000
Layer 3 forwarding database in hardware, or 64,000 routing table
entries making this an ideal switch for both wiring closet
implementations and ENTERPRISE branch offices. Even as the
customer’s network grows, the large table sizes supported in the
Summit 400-48t make this an excellent long-term solution more
than capable of supporting growth in the network.
Voice-Video-Data Convergence
Many customers are starting to reduce their overall
networking expenditures by converging their voicevideo- data
networks into a single network, and the Summit 400-48t is an
ideal solution for this convergence. The Summit 400-48t supports
up to 8 queues on every port to classify and prioritize traffic
to ensure that high priority traffic, such as voice and video
traffic, get the required bandwidth when it is needed.
Wire-Speed Access Control Lists (ACLs)
ACLs are powerful security tools and the use of ACLs in networks
is likely to increase as a way to combat security threats.
However, the value of ACLs is diminished if, by applying them,
traffic slows down, creating a congestion point. The Summit
400-48t delivers wire speed ACLs on every port for maximum
security while maintaining maximum throughput. With the Summit
400-48t an IT manager can turn on ACLs whenever they are needed
without worrying about disrupting business applications or
reducing productivity.
Jumbo Frame Support
Jumbo frame support of up to 9,216 bytes is supported–making the
Summit 400-48t an ideal switch for new applications requiring
large frames such as storage and graphic/video applications.
Studies have indicated that jumbo frames are particularly
important in high performance cluster applications where their
use can reduce server CPU loads by as much as 50%.
INTELLIGENCE TO SUPPORT NEW SERVICES AND
SIMPLIFY THE NETWORK
The Summit 400-48t delivers the ability to quickly
and efficiently provision new services in important areas like
security, bandwidth tracking and traffic prioritization. And
because these services are provisioned at the edge of the
network, the Summit 400-48t simplifies the network while making
it significantly less expensive to quickly roll out new services
at individual sites or consistently throughout the network. The
Summit 400-48t edge switch with Layer 3 intelligence and the
performance and throughput capacity helps ensure that new
services can be easily and quickly deployed widely in the
network.
Network Login and 802.1x
The Network Login feature on the Summit 400-48t is the
comprehensive user authentication tool available today. Every
user on every port can be authenticated so the network is
protected at the most common point of attack, the edge. The
Summit 400-48t can immediately reject users not authorized to
enter the switch or network. Unauthorized users can’t cause
problems in the network because they can’t enter the network and
they can’t enter the network unless authorized by Summit 400-48t
web-based or 802.1x based Network Login security features.
Security with Multiple Users on a Single Port
Another advantage of the Summit 400-48t security solution is the
Multiple Supplicant feature for shared port configurations.
Normally, when the switched port is shared, a single user
authentication opens that port for all other users, authorized
or not. The Summit 400-48t solves this problem through the
Multiple Supplicant feature of EXTREMEWare® 802.1x Network
Login. This feature associates the user with the device
accessing the network. For example, a user may access the
network from their PC by submitting an authorized password. If a
second user wants LAN access from a different device through the
same port via a shared access device (such as a hub or wireless
access point), the second user can only enter the LAN with the
correct password.
Secure Shell 2 (SSH2)
The Summit 400-48t supports SSH2 to securely transfer switch
configurations and EXTREMEWare images into and out of the
switch. To fix the known limitations in SSH, it is critical that
customers use the latest SSH2 as supported in the Summit
400-48t.
Multiple Supplicant feature enables security for
multiple users on a single port
Wire Speed Access Control Lists (ACLs)
ACLs are one of the most powerful tools to control network
resource utilization and to secure and protect the network. The
Summit 400-48t supports 5,520 ACLs (115 rules per port) based on
Layer 2, 3 or 4 header information such as the MAC address, IP
source/destination address, or TCP/UDP port number and delivers
the most comprehensive control of how end users consume
bandwidth.
Quality of Service (QoS)
The Summit 400-48t uses advanced QoS DiffServ and 802.1p (Class
of Service) protocols to classify, prioritize, and mark LAN
traffic as a way to efficiently use existing bandwidth and offer
reliable connectivity for mission-critical applications and
converged networks that are susceptible to bandwidth
availability, system latency and jitter.
Policy-Based Rate Limiting
The Summit 400-48t supports 3,000 central flow rate limiters (63
rate limiters per port) to automatically control bandwidth use
and increase overall network efficiency. For Policy-Based
Mapping, rate limiters can be applied to Layer 1-4 and can
re-write DiffServ code points and 802.1p Class of Service.
The central flow control rate limiting feature in the Summit
400-48t adds a valuable tool for bandwidth management on ingress
traffic. Similar to an Access Control List, the rate limiting
feature inspects incoming packets headers to allocate a
predefined amount of bandwidth for that traffic flow. If the
flow exceeds the assigned bandwidth, excess packets are either
dropped or modified by resetting their DiffServ code point. Rate
limits can be configured from 1 Mbps in 1 Mbps increments up to
full line rate. Rate limiting is an excellent method of managing
and prioritizing the total traffic coming into a switch and it
also enables control of the amount of bandwidth any port, user,
or application is allowed to consume.
Compatible Command Line Interface Across All
Platforms
The Summit 400-48t uses the same EXTREMEWare management commands
and has the same “look and feel” as all other EXTREME Networks
switches resulting in a common end-to-end management solution
that reduces training expenses and increases the sharing of
management expertise throughout the network. The Summit 400-48t
supports extensive management interfaces through standard
management tools like SNMP, RMON and the command line interface
(CLI). The Summit 400-48t supports web-based (HTML) management
for an advanced “manage-anywhere” capability.
Secure Management
The use of protocols like SSH2, SCP and SNMPv3 supported by
Summit 400-48t prevents the interception of management
communications and man-in-the middle attacks.
HIGH AVAILABILITY TO KEEP USERS
CONNECTED AND PRODUCTIVE
High availability is an important feature of the
Summit 400-48t because EXTREME Networks understands that
availability is critical to end user productivity. Advanced
availability features normally found only on more expensive core
switches are now standard on the Summit 400-48t. Features such
as hardware redundancy that keep the switch up and running are
combined with advanced EXTREMEWare availability software to
dynamically route around problems in the network ensuring that
the end user is not only connected, but remains productive.
High Availability Uplinks
The Summit 400-48t supports redundant copper and/or fiber
Gigabit Ethernet uplinks and redundant 10 Gigabit Ethernet
uplinks for not only the highest uplink capacity at the edge,
but also the greatest redundancy. If any single uplink port is
not available, the Summit 400-48t can automatically failover to
the redundant port for maximum resiliency and connectivity. The
result is true high availability-the user stays connected to the
network and remains productive.
External Power System
EXTREME Networks has long been a leader in providing redundant
power at the edge, but the Summit 400-48t takes this feature to
a new level. EXTREME Networks offers an External Power System
that supports multiple Summit 400-48t switches, all with full
power simultaneously. This power system provides 1-for-1 power
for every Summit 400-48t connected. No more worrying about
inadequate power if more than a single switch fails; the
External Power System provides full redundant power for every
Summit 400-48t switch. The External Power System automatically
senses when the internal power supply has failed and immediately
provides redundant power to the switch, preventing any loss of
data.
EAPS–Sub-Second Layer 2 Resiliency with Every Switch
With EXTREMEWare 7.3e and beyond, the standard Edge license that
ships with Summit 400-48t provides EAPS-Edge (RFC 3619) to
deliver subsecond (usually less than 50 msec recovery)
protection switching to Layer 2 switches interconnected in an
Ethernet ring topology. EAPS is similar to the Spanning Tree
Protocol (STP), but offers the advantage of converging in
significantly less time than STP or even Rapid Spanning Tree
(802.1w) when a link breaks in the ring. Fifty msec convergence
times are invisible to routing protocols so the routing
protocols don’t need to reconverge. Voice-over-IP (VoIP) calls
don’t drop and video feeds don’t flicker because EAPS enables
the users to stay connected even when there are link failures in
the upstream network.
Software Redundant Port
In addition to EAPS, the Summit 400-48t provides a software
redundant port, another unique option to Spanning Tree for
redundant link management. Operating at Layer 1, this resiliency
option provides simple, efficient link failovers based on
physical port status, without the need to run a bridge topology
protocol such as STP. This feature works equally well with
single ports or load-shared port aggregations, and provides
easy-to-configure physical link redundancy.
Rapid Spanning Tree (802.1w)
The Summit 400-48t includes both standard Spanning Tree Protocol
(STP) and Rapid Spanning Tree Protocol (RSTP), which provide
standards-based Layer 2 resiliency. RSTP delivers significantly
faster convergence than STP, though never in the sub-second
interval that EAPS can provide. The Summit 400-48t also provides
compatibility with Per-VLAN Spanning Tree (PVST+) and EXTREME
Multiple Instance Spanning Tree (EMISTP). These protocols run in
compatibility mode, single domain per port, to support resilient
connectivity with aggregation switches running EMISTP and PVST+.
Software Enhanced Availability
The Summit 400-48t uses advanced Layer 3 availability
intelligence to route around problems in the upstream network so
that even if part of the network infrastructure is down, users
remain connected to the network and productive. Using advanced
Layer 3 protocols like OSPF and ESRP, the Summit 400-48t is
continuously aware of the status of uplink connections, and
dynamically routes around any problem. Network administrators
can now create non-stop routing topologies that combine with
switch hardware redundancy to deliver the highest level of
availability.
Equal Cost Multi-Path
The Summit 400-48t supports the Equal Cost Multi-Path feature
that not only improves switch availability, but also improves
performance and saves the customer money. Equal Cost Multi-Path
enables dual uplinks to be load balanced for performance and
cost savings while also supporting redundant failover. If one
uplink fails, traffic is automatically routed to the remaining
uplink and connectivity is maintained.
