Administrator Guide

Table Of Contents
Configuring the Server for Automatic Address Allocation.............................................................................. 327
Specifying a Default Gateway................................................................................................................................328
Configure a Method of Hostname Resolution....................................................................................................329
Using DNS for Address Resolution....................................................................................................................... 329
Using NetBIOS WINS for Address Resolution....................................................................................................329
Creating Manual Binding Entries........................................................................................................................... 329
Debugging the DHCP Server................................................................................................................................. 330
Using DHCP Clear Commands...............................................................................................................................330
Configure the System to be a Relay Agent.............................................................................................................. 330
Configure the System to be a DHCP Client............................................................................................................. 332
DHCP Client on a Management Interface...........................................................................................................332
DHCP Client Operation with Other Features..................................................................................................... 332
DHCP Relay When DHCP Server and Client are in Different VRFs................................................................... 333
Configuring Route Leaking between VRFs on DHCP Relay Agent............................................................... 333
Non-default VRF configuration for DHCPv6 helper address............................................................................... 334
Configuring DHCP relay source interface.................................................................................................................335
Global DHCP relay source IPv4 or IPv6 configuration ....................................................................................335
Interface level DHCP relay source IPv4 or IPv6 configuration .....................................................................335
Configure Secure DHCP................................................................................................................................................336
Option 82 (DHCPv4 relay options).......................................................................................................................336
DHCPv6 relay agent options.................................................................................................................................. 337
DHCP Snooping.........................................................................................................................................................338
Drop DHCP Packets on Snooped VLANs Only.................................................................................................. 340
Dynamic ARP Inspection......................................................................................................................................... 340
Configuring Dynamic ARP Inspection................................................................................................................... 341
Source Address Validation............................................................................................................................................ 342
Enabling IP Source Address Validation................................................................................................................ 342
DHCP MAC Source Address Validation............................................................................................................... 343
Enabling IP+MAC Source Address Validation.....................................................................................................343
Viewing the Number of SAV Dropped Packets................................................................................................. 343
Clearing the Number of SAV Dropped Packets.................................................................................................344
Chapter 14: Equal Cost Multi-Path (ECMP)............................................................................... 345
ECMP for Flow-Based Affinity.................................................................................................................................... 345
Enabling Deterministic ECMP Next Hop............................................................................................................. 345
Configuring the Hash Algorithm Seed..................................................................................................................345
Link Bundle Monitoring............................................................................................................................................ 346
Managing ECMP Group Paths.....................................................................................................................................346
Creating an ECMP Group Bundle................................................................................................................................347
Modifying the ECMP Group Threshold......................................................................................................................347
BGP Multipath Operation with Link Bankwidth.......................................................................................................347
Dynamic Re-calculation of Link Bankwidth.............................................................................................................. 349
Weighted ECMP for Static Routes.............................................................................................................................349
ECMP Support in L3 Host and LPM Tables............................................................................................................. 350
Chapter 15: FCoE Transit........................................................................................................... 351
Fibre Channel over Ethernet.........................................................................................................................................351
Ensure Robustness in a Converged Ethernet Network..........................................................................................351
FIP Snooping on Ethernet Bridges............................................................................................................................. 353
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Contents