The cisco NX-OS , next generation operating system was built with modularity, resiliency and serviceability at its foundation. It is based on SAN-OS(Cisco Storage Area Network-Operating System).
Advantage of NX-OS:
1. Unified data center operating system: NX-OS can handle both LAN traffic and SAN traffic.
2. Robust and rich feature set with a variety of Cisco Innovations: Features like ISSU and PSS(described later)
3. Flexibility and scalability :
4. Modularity : Virtual Device Contexts (VDC)
5. Virtualization :
6. Resiliency
7. IPv4 and IPv6 ip routing and multicast features
8.Comprehensive security , availability, serviceability and management features
Key Features and benefits of NX-OS
1. Virtual Device Contexts: Available on Cisco Nexus 7000 switches only, these switches can be segmented into multiple virtual devices. These virtual devices function as independent switches and can run independent of each other. VDCs provide benefits like fault isolation, administration plane, seperation of data traffic and enhanced security.
2. Virtual Port Channels(VPCs) : This feature enables a server or switch to use an EtherChannel across two upstream switches without and STP blocked port to enable use of all available uplink bandwidth.
3. Continuous System Operation : Maintenance , upgrades and software certifications can be performed without service interruptions because of the modular nature of NX-OS and features such as In Service Software Upgrade and the ability for processes to restart dynamically.
4. 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.
5. Overlay Transport Virtualization (OVT) : Enables layer 2 extension between distributed data centers over any transport layer 3 network.
6. NX-OS Persistant Storage Service : The PSS is a lightweight database that maintains runtime information state. PSS provides reliable persistant storage to the software components to checkpoint their internal state and data structures enabling non-disruptive restart . If a fault occurs in a process such as OSPF the NX-OS high availability (HA) manager determines best recovery action.
Advantage of NX-OS:
1. Unified data center operating system: NX-OS can handle both LAN traffic and SAN traffic.
2. Robust and rich feature set with a variety of Cisco Innovations: Features like ISSU and PSS(described later)
3. Flexibility and scalability :
4. Modularity : Virtual Device Contexts (VDC)
5. Virtualization :
6. Resiliency
7. IPv4 and IPv6 ip routing and multicast features
8.Comprehensive security , availability, serviceability and management features
Key Features and benefits of NX-OS
1. Virtual Device Contexts: Available on Cisco Nexus 7000 switches only, these switches can be segmented into multiple virtual devices. These virtual devices function as independent switches and can run independent of each other. VDCs provide benefits like fault isolation, administration plane, seperation of data traffic and enhanced security.
2. Virtual Port Channels(VPCs) : This feature enables a server or switch to use an EtherChannel across two upstream switches without and STP blocked port to enable use of all available uplink bandwidth.
3. Continuous System Operation : Maintenance , upgrades and software certifications can be performed without service interruptions because of the modular nature of NX-OS and features such as In Service Software Upgrade and the ability for processes to restart dynamically.
4. 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.
5. Overlay Transport Virtualization (OVT) : Enables layer 2 extension between distributed data centers over any transport layer 3 network.
6. NX-OS Persistant Storage Service : The PSS is a lightweight database that maintains runtime information state. PSS provides reliable persistant storage to the software components to checkpoint their internal state and data structures enabling non-disruptive restart . If a fault occurs in a process such as OSPF the NX-OS high availability (HA) manager determines best recovery action.
- Restart a process
- Switch over to a redundant supervisor module
7. Fabric Path : This is similar to link state protocol which enables each device to build an overall view of the topology. Each device is identified by a swtich id. This eliminates spanning tree to maximize network bandwidth and flexibility.
For more datails on fabric path refer to : Fabric Path
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