As you see understanding of hardware is a essential stuff… but software understanding is mandatory to run that particular hardware. Here is the same case… Now since we know the hardware its time to have a look at software.
The Cisco NX-OS is same as IOS… with lot of modifications. It’s a highly available and modular operating system designed specifically for the Data Center. It supports Layer 3 Routing, Layer 2 Bridging and SAN Switching (Storage). It also supports virtualization.
ISSU
In Service Software Upgrade. Well this is something great feature Cisco came up with. Now you can upgrade your NX-OS on a live Nexus Switch while its in a service. You don’t have to worry about your Data Traffic. It will keep flowing :-)
Support for Storage Protocols
Previously 6500 used to support L2 switching and L3 Routing only. All the storage switches were separate. Now Cisco has came up with one more feature… They have integrated the protocols which are required for storage in NX-OS itself. For those who are not aware of storage switches, have you heard or Brocade? Well, now you don’t need those extra switches. Only thing is you have to upgrade your Lic for NX-OS to support storage protocols.
Command Line Interface (CLI)
Cisco has kept the Look-and-Feel of IOS in the NX-OS with many enhancements. The architecture of OS is changed a lot.
The Cisco NX-OS is same as IOS… with lot of modifications. It’s a highly available and modular operating system designed specifically for the Data Center. It supports Layer 3 Routing, Layer 2 Bridging and SAN Switching (Storage). It also supports virtualization.
ISSU
In Service Software Upgrade. Well this is something great feature Cisco came up with. Now you can upgrade your NX-OS on a live Nexus Switch while its in a service. You don’t have to worry about your Data Traffic. It will keep flowing :-)
Support for Storage Protocols
Previously 6500 used to support L2 switching and L3 Routing only. All the storage switches were separate. Now Cisco has came up with one more feature… They have integrated the protocols which are required for storage in NX-OS itself. For those who are not aware of storage switches, have you heard or Brocade? Well, now you don’t need those extra switches. Only thing is you have to upgrade your Lic for NX-OS to support storage protocols.
Command Line Interface (CLI)
Cisco has kept the Look-and-Feel of IOS in the NX-OS with many enhancements. The architecture of OS is changed a lot.
- You can execute show commands in any mode now… with parser help even in configuration mode.
- “Slash” notation supported for all IPv4/IPv6 masks. You can use “/” while assigning ip address on the interface or in a static route command ;-)
key displays brief list of all available options of the commands - ? key help is still available.
- Variety of pipe options for CLI output including grep, less, no-more etc… just like your unix.
- Multiple levels of pipe options are available.
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