Updating cisco ios 2600 Hardcore camchat
The M releases are extended maintenance releases, and Cisco will provide bug fixes for 44 months.The T releases are standard maintenance releases, and Cisco will only provide bug fixes for 18 months.The set available is determined by the "mode" and the privilege level of the current user."Global configuration mode" provides commands to change the system's configuration, and "interface configuration mode" provides commands to change the configuration of a specific interface.All commands are assigned a privilege level, from 0 to 15, and can only be accessed by users with the necessary privilege.Through the CLI, the commands available to each privilege level can be defined. Using the Embedded event manager feature, the interpreter can be scripted to react to events within the networking environment, such as interface failure or periodic timers.
The available feature packs are: An Interface Descriptor Block, or simply IDB, is a portion of memory or Cisco IOS internal data structure that contains information such as the IP address, interface state, and packet statistics for networking data.
In routers with hardware-based forwarding, such as the Cisco 12000 series, IOS computes the FIB in software and loads it into the forwarding hardware (such as an ASIC or network processor), which performs the actual packet forwarding function.