Concept Guide

How Enhanced Transmission Selection is Implemented..................................................................................... 258
ETS Operation with DCBx......................................................................................................................................259
Hierarchical Scheduling in ETS Output Policies......................................................................................................... 259
DCBx Operation.............................................................................................................................................................260
DCBx Operation.......................................................................................................................................................260
DCBx Port Roles......................................................................................................................................................260
DCB Conguration Exchange................................................................................................................................. 261
Conguration Source Election................................................................................................................................262
Propagation of DCB Information............................................................................................................................262
Auto-Detection of the DCBx Version.................................................................................................................... 263
DCBx Example..........................................................................................................................................................263
DCBx Prerequisites and Restrictions.....................................................................................................................264
DCBx Error Messages.............................................................................................................................................265
Debugging DCBx on an Interface.......................................................................................................................... 265
Verifying the DCB Conguration................................................................................................................................. 265
QoS dot1p Trac Classication and Queue Assignment.......................................................................................... 274
Troubleshooting PFC, ETS, and DCBx Operation...................................................................................................... 274
15 Dynamic Host Conguration Protocol (DHCP)......................................................................................... 277
Supported Modes.......................................................................................................................................................... 277
Assigning an IP Address using DHCP.......................................................................................................................... 277
Debugging DHCP Client Operation............................................................................................................................. 279
DHCP Client.................................................................................................................................................................... 281
How DHCP Client is Implemented................................................................................................................................281
DHCP Client on a Management Interface..................................................................................................................282
DHCP Client on a VLAN............................................................................................................................................... 282
DHCP Packet Format and Options..............................................................................................................................282
Option 82........................................................................................................................................................................284
DHCPv6 relay agent options........................................................................................................................................284
Releasing and Renewing DHCP-based IP Addresses................................................................................................285
Viewing DHCP Statistics and Lease Information.......................................................................................................285
Conguring DHCP relay source interface...................................................................................................................286
Global DHCP relay source IPv4 or IPv6 conguration ....................................................................................... 286
Interface level DHCP relay source IPv4 or IPv6 conguration ..........................................................................287
DHCP Snooping.............................................................................................................................................................288
DHCP Snooping for a Multi-Tenant Host..............................................................................................................288
DHCP Snooping in a VLT Setup.............................................................................................................................289
Enabling DHCP Snooping....................................................................................................................................... 289
Enabling IPv6 DHCP Snooping.............................................................................................................................. 289
Adding a Static Entry in the Binding Table............................................................................................................289
Adding a Static IPV6 DHCP Snooping Binding Table..........................................................................................290
Clearing the Binding Table...................................................................................................................................... 290
Clearing the DHCP IPv6 Binding Table................................................................................................................. 290
Displaying the Contents of the Binding Table...................................................................................................... 290
Displaying the Contents of the DHCPv6 Binding Table.......................................................................................291
Debugging the IPv6 DHCP..................................................................................................................................... 291
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