Networking-Cisco IOS-XE

• Cisco IOS XE is a inter networking operating system(IOS) of cisco systems.  Mostly we could see this operating systems in ASR1000 series routers.

• To understand Cisco IOS XE we will use master and slave concept. Cisco IOS XE will have two codes. Master code IOS process is  the main process and other code is like a slave, when master issues order slave will do it job.

Here route processor(RP) plays a major role in which has

• RP base
• RP control
• RP operating system

• Above will be into control plane and in between IOS and rest platform
• IOS-XE runs processes deamon on Linux based. Complete image has a sub packages called as consolidated package.
• RP access uses the protocol SSL/SSH.
• RP IOS provides cisco IOS kernel.
• Cisco IOS-XE built on Linux and provides distributed software architecture that moves many operating system responsibilities out of the IOS process and has a copy of IOS running as a separate process. Since it runs a copy of IOS, all CLI commands are same for Cisco IOS and Cisco IOS-XE. In contrast to Cisco IOS-XR which has completely different code base and its developers implemented quite a different CLI command set.

ESP(Embedded Service Processor) Base:

Data plane and all flow of data's, embedded service processor responsible for features QOS, ACL, Netflow, NAT

SIP(Shared Port Adapter Interface Processor) Base:

Shared port Adapter SPA OS and control plane is a carrier card that you insert on reader slot.

SPA driver and FPD (field programmable device) provides interface between Network and shared port adapter interface processor.

Hill Station view:

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How to secure devices from cyber threats:

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