nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

• Security: Cisco NX-OS provides outstanding data confidentiality and integrity,
supporting standard IEEE 802.1AE link-layer cryptography with 128-bit Advanced
Encryption Standard (AES) cryptography. In addition to CTS, there are many
additional security features such as access control lists (ACLs) and port-security, for
example.
• Overlay Transport Virtualization (OTV): Enables the Layer 2 extension between
distributed data centers over any transport Layer 3 network.
• NX-OS Persistent Storage Service (PSS): The PSS is a lightweight database that
maintains runtime information state. PSS provides reliable persistent storage to the
software components to checkpoint their internal state and data structures enabling
nondisruptive restart. If a fault occurs in a process (such as OSPF), the NX-OS highavailability
(HA) manager determines best recovery action:
• Restart a process.
• Switch over to a redundant supervisor module.
Note
The process restart does not have any impact in the data plane operations; the total
control plane recovery is approximately 10 milliseconds.
• FabricPath: Enables each device to build an overall view of the topology; this is
similar to other link state routing protocols. Each device in the FabricPath topology is
identified by a switch-id. The Layer 2 forwarding tables are built based on
reachability to each switch-id, not by the MAC address. Eliminates spanning-tree to
maximize network bandwidth and flexibility in topological configurations, as well as
simplify operational support and configuration. This enables a tremendous amount of
flexibility on the topology because you can now build FabricPath topologies for Layer
2-based networks the same as for Layer 3-based networks.
NX-OS Supported Platforms
An NX-OS data center-class operating system, designed for maximum scalability and
application availability, has a wide variety of platform support, including the following:
• Nexus 7000: Provides an end-to-end data center architecture on a single platform,
including data center core, data center aggregation, and data center access layer. The
data center access layer could be end-of-row or top-of-rack or a combination of endof-row
and top-of-rack with a Fabric Extender (FEX). Depending on the requirements,
the Nexus 7000 has many different form factors; the form factors include the following
(note that all the chassis share common supervisor modules, I/O modules, NX-OS
software, and power supplies):
• Nexus 7018: An 18-slot chassis that supports 16 I/O modules. Slots 9 and slot 10
are reserved for supervisor modules on the Nexus 7018 chassis. The I/O module
slots for the Nexus 7018 chassis are reserved 1 through 8 and 11 through 18. The
supervisor module slots (9 and 10) can have only a supervisor module installed in