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The Cisco IOS monolithic kernel does not implement memory protection for the data of different processes. The entire physical memory is mapped into one virtual address space. The Cisco IOS kernel does not perform any memory paging or swapping. Therefore the addressable memory is limited to the physical memory of the network device on which the ...
IOS XE is a release train of Cisco Systems' widely deployed Internetworking Operating System (IOS), introduced with the ASR 1000 series. [2]It is built on Linux [3] [4] and provides a distributed software architecture that moves many operating system responsibilities out of the IOS process [5] [6] and has a copy of IOS running as a separate process. [7]
Cisco IOS XR Line card running IOS XR. IOS XR is a release train of Cisco Systems ' widely deployed Internetwork Operating System (IOS) , used on their high-end Network Convergence System (NCS) and carrier-grade routers such as the ASR 9000 series and Carrier Routing System series of routers.
Cisco Embedded Event Manager (EEM) is a feature included in Cisco's IOS operating system (and some other Cisco OSes such as IOS-XR, IOS-XE, and NX-OS) that allow programmability and automation capabilities inside the device. EEM allows the behavior of a Cisco device to adapt to specific user requirements by allowing scripting, thresholding ...
Cisco 6509 switch with four line cards and dual supervisors. The Cisco Catalyst 6500 is a modular chassis network switch manufactured by Cisco Systems from 1999 to 2015, capable of delivering speeds of up to "400 million packets per second". [1] A 6500 comprises a chassis, power supplies, one or two supervisors, line cards, and service modules.
However, due to functional limitations, it is intended by Cisco to be used only as a learning aid, not a replacement for Cisco routers and switches. [9] The application itself only has a small number of features found within the actual hardware running a current Cisco IOS version. Thus, Packet Tracer is unsuitable for modelling production networks.
Cisco IOS, software used in Cisco routers (supports version 1, version 2 and RIPng) Cisco NX-OS software used in Cisco Nexus data center switches (supports RIPv2 only [15]) Junos software used in Juniper routers, switches, and firewalls (supports RIPv1 and RIPv2) Routing and Remote Access, a Windows Server feature, contains RIP support
In 2001, Cisco released information that indicated that, even in read-only mode, the SNMP implementation of Cisco IOS is vulnerable to certain denial of service attacks. These security issues can be fixed through an IOS upgrade. [28] If SNMP is not used in a network it should be disabled in network devices.