Specifications

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km while reducing the cable complexity of implementing a
stacking solution. SummitStack-V is compatible with X440,
X440-G2, X450, X450-G2, X460, X460-G2, X480, X670,
X670V, and X770 switches running the same version of
ExtremeXOS. SummitStack-V enabled 10 GbE ports must
be physically direct-connected.
SummitStack-V80/V160/V320—Flexible Stacking
Over 40 Gigabit Ethernet
The X670-G2-48x-4q also supports high-speed 80Gbps,
160 Gbps, and 320Gbps stacking using QSFP+ ports,
which is ideal for demanding applications where a high
volume of trac traverses through the stacking links,
yet bandwidth is not compromised through stacking.
SummitStack-V80, -V160, and -V320 can support passive
copper cables (up to 1m), active multi-mode fiber cable (up
to 100m), and QSFP+ optical transceivers for 40 GbE up to
10km. With SummitStack, the X670-G2-48x-4q provides a
flexible stacking solution inside the data center or central
oce to create a virtualized switching infrastructure across
rows of racks.
ExtremeXOS Intelligent L2 and L3 Switching
The X670-G2 supports sophisticated and intelligent
Layer 2 switching, as well as Layer 3 IPv4/IPv6 routing
including policy-based switching/routing, Provider Bridges,
bidirectional ingress and egress Access Control Lists, and
bandwidth control by 8 Kbps granularity both for ingress
and egress.
To provide scalable network architectures used mainly for
Carrier Ethernet network deployment, the X670-G2 supports
MPLS LSP-based Layer 3 forwarding and Hierarchical
VPLS (H-VPLS) for transparent LAN services. With H-VPLS,
transparent Layer 3 networks can be extended throughout
the Layer 3 network cloud by using a VPLS tunnel between
the regional transparent LAN services typically built by
Provider Bridges (IEEE 802.1ad) technology.
1588 Precision Time Protocol (PTP)
The X670-G2 oers Boundary Clock (BC), Transparent
Clock (TC), and Ordinary Clock (OC) for synchronizing
phase and frequency and allowing the network and
the connected devices to be synchronized down to
microseconds of accuracy over Ethernet connection.
Audio Video Bridging (AVB)
The X670-G2 series supports IEEE 802.1 Audio Video
Bridging to enable reliable, real-time audio/video
transmission over Ethernet. AVB technology delivers the
quality of service required for today’s high-definition and
time-sensitive multimedia streams.
Low Latency Switching for Cluster Computing
The X670-G2 can achieve latency less than 600
nanoseconds and supports cut-through switching for
latency-sensitive cluster computing.
Extended Edge Switching
The X670-G2 supports Extreme Extended Edge Switching,
an innovative solution that simplifies the deployment and
operation of edge switches. With this solution, the X670-G2
can be meshed with economical V300 or V400 Series
access devices to form a single logical switch. Advanced
X670-G2 services can then be seamlessly delivered to the
V300 or V400 edge switches. The result is a simplified
operational model that reduces costs.
Modular Operating System for
Non-Stop Operation
Loadable Software Modules
The modular design of the ExtremeXOS OS allows the
adding or upgrading of individual software modules
dynamically without requiring a system reboot, leading to
higher availability in the network.
Preemptive Multitasking and Protected Memory
The X670-G2 series switches allow each of many
applications— such as Open Shortest Path First (OSPF)
and Spanning Tree Protocol (STP)—to run as separate OS
processes that are protected from each other. This drives
increased system integrity and inherently protects against
cross-platform DoS attacks.
Process Monitoring and Restart
ExtremeXOS 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.
Rich OAM Suite – CFM, Y.1731, BFD
The X670-G2 series switches supports a rich suite of
protocols to help with Operations, Administration and
Maintenance. Connectivity Fault Management (CFM)
allows detection, verification, and isolation of connectivity
failures in virtual bridged LAN. Y.1731 is largely similar to
CFM but also supports performance management by way
of frame delay and frame delay variation measurements.
Bidirectional Forwarding Detection (BFD) is a hello
protocol that provides the rapid detection of failures in the
forwarding path and helps the separation of control plane
connectivity from forwarding plane connectivity.