HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 158
Possible Scenarios for Updating the Configuration File, Operating Notes
View all HP 6120XG manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 158 highlights
Switch Memory and Configuration Automatic Configuration Update with DHCP Option 66 Possible Scenarios for Updating the Configuration File The following table shows various network configurations and how Option 66 is handled. Scenario Single Server serving Multiple VLANs Multiple Servers serving a Single VLAN Multiple Servers serving Multiple VLANs Multi-homed Server serving Multiple VLANs Behavior • Each DHCP-enabled VLAN interface initiates DHCPDISCOVER message, receives DHCPOFFER from the server, and send DHCPREQUEST to obtain the offered parameters. • If multiple interfaces send DHCPREQUESTs, it's possible that more than one DHCPACK is returned with a valid Option 66. • Evaluating and updating the configuration file occurs only on the primary VLAN. • Option 66 is ignored by any interfaces not belonging to the primary VLAN. • Each DHCP-enabled VLAN interface initiates one DHCPDISCOVER and receives one or more DHCPOFFER messages. • Each interface accepts the best offer. • Option 66 is processed only for the interface belonging to the primary VLAN. • Each DHSP-enabled VLAN interface initiates DHCPDISCOVER and receives one or more DHCPOFFER messages. • Each interface accepts the best offer. • Option 66 is processed only for the interface belonging to the primary VLAN. • The switch perceives the multi-homed server as multiple separate servers. • Each DHCP-enabled VLAN interface initiates DHCPDISCOVER and receives one DHCPOFFER message. • Each interface accepts the offer. • Option 66 is processed only for the interface belonging to the primary VLAN. Operating Notes Replacing the Existing Configuration File: After the DHCP client down loads the configuration file, the switch compares the contents of that file with the existing configuration file. If the content is different, the new configuration file replaces the existing file and the switch reboots. Option 67 and the Configuration File Name: Option 67 includes the name of the configuration file. If the DHCPACK contains this option, it overrides the default name for the configuration file (switch.cfg) 6-42