Concept Guide

4 Conguration Cloning.................................................................................................................................. 32
Cloning Conguration Output Status............................................................................................................................32
5 Data Center Bridging (DCB)........................................................................................................................ 35
Supported Modes............................................................................................................................................................ 35
Ethernet Enhancements in Data Center Bridging........................................................................................................35
Priority-Based Flow Control..................................................................................................................................... 36
Enhanced Transmission Selection............................................................................................................................ 37
Data Center Bridging Exchange Protocol (DCBx).................................................................................................39
Data Center Bridging in a Trac Flow.....................................................................................................................39
Enabling Data Center Bridging....................................................................................................................................... 39
Conguring DCB Maps and its Attributes.............................................................................................................. 40
Data Center Bridging: Default Conguration................................................................................................................43
Data Center Bridging: Auto-DCB-Enable Mode...........................................................................................................44
Conguring Priority-Based Flow Control...................................................................................................................... 45
How Priority-Based Flow Control is Implemented................................................................................................. 47
Conguring Enhanced Transmission Selection.............................................................................................................48
How Enhanced Transmission Selection is Implemented....................................................................................... 48
ETS Operation with DCBx........................................................................................................................................ 49
Hierarchical Scheduling in ETS Output Policies........................................................................................................... 49
DCBx Operation............................................................................................................................................................... 50
DCBx Operation......................................................................................................................................................... 50
DCBx Port Roles........................................................................................................................................................ 50
DCB Conguration Exchange................................................................................................................................... 51
Conguration Source Election..................................................................................................................................52
Propagation of DCB Information..............................................................................................................................52
Auto-Detection of the DCBx Version...................................................................................................................... 52
DCBx Example............................................................................................................................................................53
DCBx Prerequisites and Restrictions.......................................................................................................................54
DCBx Error Messages...............................................................................................................................................55
Debugging DCBx on an Interface............................................................................................................................ 55
Verifying the DCB Conguration................................................................................................................................... 55
QoS dot1p Trac Classication and Queue Assignment............................................................................................ 65
Troubleshooting PFC, ETS, and DCBx Operation........................................................................................................65
Conguring the Dynamic Buer Method......................................................................................................................67
6 Dynamic Host Conguration Protocol (DHCP)............................................................................................ 69
Supported Modes............................................................................................................................................................69
Assigning an IP Address using DHCP............................................................................................................................69
Debugging DHCP Client Operation................................................................................................................................ 71
DHCP Client......................................................................................................................................................................72
How DHCP Client is Implemented................................................................................................................................. 73
DHCP Client on a Management Interface.................................................................................................................... 73
DHCP Client on a VLAN..................................................................................................................................................74
DHCP Packet Format and Options................................................................................................................................74
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