Cisco IOS software maintains one IDB for each interface present on a platform and one IDB for each subinterface.Ī HWIDB represents a physical interface, which includes physical ports and channelized interface definitions. Background InformationĪn Interface Descriptor Block (IDB) is a special control structure internal to the Cisco IOS software that contains information such as the IP address, interface state, and packet statistics. Refer to Cisco Technical Tips Conventions for more information on document conventions. If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The information in this document is based on the software and hardware releases that the IDB Limits Per Platform section lists. There are no specific requirements for this document. This document explains the Interface Descriptor Block (IDB) limit, and provides the limits for the different Cisco IOS ® software-supported platforms and Cisco IOS software releases.
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