cisco ccna tutorial

cisco ccna tutorial

!! Primary tunnel Hello data unit: sent periodically to determine whether other ISs are running IS-IS , establish adjacencies,cisco ccna tutorial, exchange LSPs , and synchronize LSDBs . AFI Authority and Format Identifier , 1- byte authorization and format identifier. The AFI field identifies the syntax of the upper addressing domain and DSP portion associated with the NSAP . The AFI field ranges from 0 to 99 decimal numbers. The higher address field provides a variety of subdomains whose values ​​are assigned by the IDI field. Each high-level domain defines its own IDI field format. Below is the address field AFI and DSP syntax types.