Concept Guide

Table Of Contents
How Enhanced Transmission Selection is Implemented..................................................................................... 257
ETS Operation with DCBx......................................................................................................................................258
Hierarchical Scheduling in ETS Output Policies......................................................................................................... 258
DCBx Operation.............................................................................................................................................................259
DCBx Operation.......................................................................................................................................................259
DCBx Port Roles...................................................................................................................................................... 259
DCB Conguration Exchange................................................................................................................................ 260
Conguration Source Election................................................................................................................................ 261
Propagation of DCB Information............................................................................................................................ 261
Auto-Detection of the DCBx Version.................................................................................................................... 262
DCBx Example..........................................................................................................................................................262
DCBx Prerequisites and Restrictions.....................................................................................................................263
DCBx Error Messages.............................................................................................................................................264
Debugging DCBx on an Interface.......................................................................................................................... 264
Verifying the DCB Conguration................................................................................................................................. 264
QoS dot1p Trac Classication and Queue Assignment.......................................................................................... 273
Troubleshooting PFC, ETS, and DCBx Operation...................................................................................................... 273
15 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 276
Supported Modes.......................................................................................................................................................... 276
Assigning an IP Address using DHCP.......................................................................................................................... 276
Debugging DHCP Client Operation..............................................................................................................................278
DHCP Client................................................................................................................................................................... 279
How DHCP Client is Implemented...............................................................................................................................280
DHCP Client on a Management Interface..................................................................................................................280
DHCP Client on a VLAN................................................................................................................................................ 281
DHCP Packet Format and Options.............................................................................................................................. 281
Option 82........................................................................................................................................................................ 282
Releasing and Renewing DHCP-based IP Addresses................................................................................................283
Viewing DHCP Statistics and Lease Information.......................................................................................................283
Conguring DHCP relay source interface...................................................................................................................284
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 284
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................285
DHCP Snooping.............................................................................................................................................................286
DHCP Snooping for a Multi-Tenant Host..............................................................................................................286
DHCP Snooping in a VLT Setup.............................................................................................................................287
Enabling DHCP Snooping........................................................................................................................................287
Enabling IPv6 DHCP Snooping...............................................................................................................................287
Adding a Static Entry in the Binding Table............................................................................................................287
Adding a Static IPV6 DHCP Snooping Binding Table.......................................................................................... 288
Clearing the Binding Table...................................................................................................................................... 288
Clearing the DHCP IPv6 Binding Table................................................................................................................. 288
Displaying the Contents of the Binding Table.......................................................................................................288
Displaying the Contents of the DHCPv6 Binding Table...................................................................................... 289
Debugging the IPv6 DHCP.....................................................................................................................................289
IPv6 DHCP Snooping MAC-Address Verication................................................................................................290
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