User Manual
Priority-Based Flow Control...............................................................................................................28
Configuring Priority-Based Flow Control.................................................................................... 29
Enhanced Transmission Selection......................................................................................................31
Configuring Enhanced Transmission Selection........................................................................... 33
Data Center Bridging Exchange Protocol (DCBx)............................................................................. 33
Data Center Bridging in a Traffic Flow............................................................................................... 34
Data Center Bridging: Auto-DCB-Enable Mode................................................................................34
QoS dot1p Traffic Classification and Queue Assignment................................................................. 36
How Priority-Based Flow Control is Implemented............................................................................37
How Enhanced Transmission Selection is Implemented..................................................................38
ETS Operation with DCBx.............................................................................................................39
Bandwidth Allocation for DCBX CIN............................................................................................ 39
DCBX Operation..................................................................................................................................39
DCBx Operation............................................................................................................................40
DCBx Port Roles............................................................................................................................40
DCB Configuration Exchange.......................................................................................................41
Configuration Source Election..................................................................................................... 42
Propagation of DCB Information..................................................................................................42
Auto-Detection of the DCBx Version...........................................................................................43
DCBX Example...............................................................................................................................43
DCBX Prerequisites and Restrictions............................................................................................44
DCBX Error Messages................................................................................................................... 45
Debugging DCBX on an Interface................................................................................................ 45
Verifying the DCB Configuration........................................................................................................46
Hierarchical Scheduling in ETS Output Policies................................................................................ 56
Troubleshooting PFC, ETS, and DCBx Operation..............................................................................56
5 Dynamic Host Configuration Protocol (DHCP)............................................ 59
Assigning an IP Address using DHCP................................................................................................. 59
Debugging DHCP Client Operation................................................................................................... 61
DHCP Client........................................................................................................................................ 63
How DHCP Client is Implemented.....................................................................................................63
DHCP Client on a Management Interface......................................................................................... 64
DHCP Client on a VLAN......................................................................................................................64
DHCP Packet Format and Options.....................................................................................................65
Option 82............................................................................................................................................ 66
Releasing and Renewing DHCP-based IP Addresses........................................................................ 67
Viewing DHCP Statistics and Lease Information............................................................................... 67
6 FIP Snooping....................................................................................................... 69
Fibre Channel over Ethernet...............................................................................................................69
Ensuring Robustness in a Converged Ethernet Network..................................................................69