Users Guide

4 Configuration Cloning..................................................................................................................................32
Cloning Configuration 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 Traffic Flow....................................................................................................................39
Enabling Data Center Bridging.......................................................................................................................................39
Configuring DCB Maps and its Attributes.............................................................................................................. 40
Data Center Bridging: Default Configuration............................................................................................................... 43
Data Center Bridging: Auto-DCB-Enable Mode.......................................................................................................... 44
Configuring Priority-Based Flow Control......................................................................................................................45
How Priority-Based Flow Control is Implemented.................................................................................................47
Configuring 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 Configuration Exchange................................................................................................................................... 51
Configuration 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 Configuration................................................................................................................................... 55
QoS dot1p Traffic Classification and Queue Assignment........................................................................................... 65
Troubleshooting PFC, ETS, and DCBx Operation....................................................................................................... 65
Configuring the Dynamic Buffer Method..................................................................................................................... 67
6 Dynamic Host Configuration 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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