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Cuda 12000 IP Access Switch CLI-based Administration Guide
Configuring DHCP Authority Ranges 267
Configuring DHCP Authority Ranges
The DHCP Authority ranges that you define for an interface dictate which
addresses are protected by the authority feature. These DHCP authority IP
address ranges that you define must fall within the range of IP addresses as
allowed by the IP interface (as dictated by the network mask for that IP
interface).
For example, if the physical interface has an IP interface of 172.16.19.1
255.255.255.0 installed, you can define a DHCP Authority range from
172.16.19.2 to 172.16.19.254, or any subset of that IP address range. Note
that you can define up to 200 IP address ranges per physical interface.
You define a DHCP authority range by performing the following tasks:
The DHCP authority ranges take effect upon the next DHCP server exchange
with the client. This means that after you configure a range, you should
reboot the client so that the ARP entry for that client is updated.
Example
The following example configures a DHCP authority range on cable interface
1/1/1 that protects all addresses that fall within 172.16.19.10 to
172.16.19.20, the uses the
show dhcp-authority command to verify the
configuration:
cli:192.168.208.3:root# interface 1/1/1
mode: interface:cable:csi(1/1/1)
cli:192.168.208.3:interface:cable:csi(1/1/1)# dhcp-authority 1 start
172.16.19.10 end 172.16.19.20
cli:192.168.208.3:interface:cable:csi(1/1/1)# show dhcp-authority
row count: 1
Range Number Lower Range Upper Range Status
---------------- ---------------- ---------------- ------
1 172.16.19.10 172.16.19.20 1
DHCP Authority Status enable
Task Command
1. Enter interface type mode. interface <c/s/i>
2. Configure a DHCP authority range
on the current interface.
dhcp-authority <index number> start
<ip address> end <ip address>