Cisco ASR1002-10G-VPN/K9 Software Guide - Page 22
Processes Overview
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Processes Overview Chapter 1 Software Packaging and Architecture Processes Overview Cisco IOS XE has numerous components that run entirely as separate processes on the Cisco ASR 1000 Series Routers. This modular architecture increases network resiliency by distributing operating responsibility among separate processes rather than relying on Cisco IOS software for all operations. This section covers the following topics: • IOS as a Process, page 1-7 • Dual IOS Processes, page 1-8 Table 1-2 provides a list of the important individual processes for the Cisco ASR 1000 Series Routers. These processes run in the background, and the CLI on Cisco ASR 1000 Series Routers using Cisco IOS-XE is identical in look, feel, and usage to the Cisco IOS CLI on most platforms. This information is provided because it may be useful for checking router state and troubleshooting, but understanding this information is not essential to understanding most router operations. Table 1-2 Individual Processes Process Chassis Manager Host Manager Logger Interface Manager IOS Purpose Affected FRUs SubPackage Mapping Responsible for all chassis management functions, including management of the HA state, environmental monitoring, and FRU state control. RP (one instance per RP) SIP (one instance per SIP) ESP (one instance per ESP) RPControl SIPBase ESPBase Provides an interface between the IOS process and many of the information-gathering functions of the underlying platform kernel and operating system. RP (one instance per RP) SIP (one instance per SIP) ESP (one instance per ESP) RPControl SIPBase ESPBase Provides IOS facing logging services to processes running on each FRU. RP (one instance per RP) SIP (one instance per SIP) ESP (one instance per ESP) RPControl SIPBase ESPBase Provides an interface between the IOS process and the per-SPA interface processes on the SIP. RP (one instance per RP) SIP (one instance per SIP) RPControl SIPBase The IOS process implements all forwarding and routing features for the router. RP (one per software RPIOS redundancy instance per RP). Maximum of two instances per RP. Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide 1-6 OL-16506-10