Chapter 7
IP Address Assignment
RUGGEDCOM ROX II
CLI User Guide
238
Configuring Subnet Options
Parameter
Description
The minimum leased time in seconds that the server offers to the clients.
maximum { maximum }
Synopsis:
A 32-bit unsigned integer
Default:
7200
The maximum leased time in seconds that the server offers to the clients.
4. Configure the client settings by configuring the following parameter(s):
IMPORTANT!
For IPv4 only:
If DHCP relay (or Option 82) clients are used on the same subnet as the DHCP server, some clients
will try to renew a lease immediately after receiving it by requesting a renewal directly from the
DHCP server. Because the DHCP server is configured by default to only provide the lease through
a relay agent configured with the current Option 82 fields, the server sends the client a NAK
(negative acknowledgment or not acknowledged) message to disallow the lease. Enabling Option
82 disables the NAK message so the renewal request sent from the DHCP relay agent (which the
DHCP server accepts, since it has the correct Option 82 fields added) is the only message for which
the client receives a reply.
Option 82 support should only be enabled If the DHCP server and clients are on the same subnet.
The meaning of most Option 82 fields is determined by the DHCP relay client. To determine which
values are required by the client for special options, refer to the client documentation.
DHCP relay support can also be enabled on individual subnets.
•
For IPv4
Parameter
Description
unknown-client { unknown-client }
Synopsis:
{ allow, deny, ignore }
The action to take for previously unregistered clients
option82
Enables/disables the NAK of option 82 clients for this subnet.
authorize-server
Enables/disables the server's authorization on this client. If enabled, the server will
send deny messages to the client that is trying to renew the lease, which the server
knows the client shouldn't have.
•
For IPv6
Parameter
Description
unknown-client { unknown-client }
Synopsis:
{ allow, deny, ignore }
The action to take for previously unregistered clients
authorize-server
Enables/disables the server's authorization on this client. If enabled, the server will
send deny messages to the client that is trying to renew the lease, which the server
knows the client shouldn't have.
5. [Optional] Configure configuration options for DHCP clients at the subnet level. For more information, refer to
Section 7.3.5.1, “Configuring Standard DHCP Client Configuration Options (IPv4)”
“Configuring Standard DHCP Client Configuration Options (IPv6)”
.
6. Configure one or more address pools to the subnet. For more information, refer to
Section 7.3.12.2, “Adding an Address Pool (IPv6)”
7. Configure one or more IP ranges to the subnet. For more information, refer to
Section 7.3.13.2, “Adding an IP
Section 7.3.14.2, “Adding an IP Range (IPv6)”
.
Summary of Contents for RUGGEDCOM ROX II
Page 2: ...RUGGEDCOM ROX II CLI User Guide ii ...
Page 4: ...RUGGEDCOM ROX II CLI User Guide iv ...
Page 39: ...RUGGEDCOM ROX II CLI User Guide Table of Contents xxxix 19 5 VLANs 752 ...
Page 40: ...Table of Contents RUGGEDCOM ROX II CLI User Guide xl ...
Page 46: ...Preface RUGGEDCOM ROX II CLI User Guide xlvi Customer Support ...
Page 170: ...Chapter 5 System Administration RUGGEDCOM ROX II CLI User Guide 124 Deleting a Scheduled Job ...
Page 256: ...Chapter 6 Security RUGGEDCOM ROX II CLI User Guide 210 Enabling Disabling a Firewall ...
Page 402: ...Chapter 11 Wireless RUGGEDCOM ROX II CLI User Guide 356 Managing Cellular Modem Profiles ...
