8 Configuring IP Addressing
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Just Want a Quick Start with IP Addressing? . . . . . . . . . . . . . . . . . . . . 8-4
IP Addressing with Multiple VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
IP Addressing in a Stacking Environment . . . . . . . . . . . . . . . . . . . . . . . 8-5
Menu: Configuring IP Address, Gateway, and Time-To-Live (TTL) . . 8-5
CLI: Configuring IP Address, Gateway, and Time-To-Live (TTL) . . . . 8-7
Web: Configuring IP Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
How IP Addressing Affects Switch Operation . . . . . . . . . . . . . . . . . . . 8-11
DHCP/Bootp Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
Network Preparations for Configuring DHCP/Bootp . . . . . . . . . 8-15
IP Preserve: Retaining VLAN-1 IP Addressing Across Configuration
File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
Operating Rules for IP Preserve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
9 Time Protocols
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
TimeP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
SNTP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Overview: Selecting a Time Synchronization Protocol or
Turning Off Time Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
General Steps for Running a Time Protocol on the Switch . . . . . . . . . 9-3
Disabling Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
SNTP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Menu: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
CLI: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Viewing the Current SNTP Configuration . . . . . . . . . . . . . . . . . . . . 9-8
Configuring (Enabling or Disabling) the SNTP Mode . . . . . . . . . . 9-9
TimeP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Menu: Viewing and Configuring TimeP . . . . . . . . . . . . . . . . . . . . . . . . 9-15
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