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ADC Telecommunications, Inc.
270 C
HAPTER 13: CONFIGURING DHCP AUTHORITY
The following example protects all IP addresses within the address range of
192.168.19.51 to 192.168.19.55 using the
dhcp-authority command.
The next time that the attached cable modems reinitialize, those cable
modems assigned IP addresses that fall within the DHCP Authority range are
tagged by the DHCP server as type Other. Those entries shown as type Other
are protected by the DHCP Authority feature. Entries shown as “dynamic”
are fixed IP addresses.
cli:172.16.19.10:interface:cable:csi(1/1/1)# show arp
row count: 12
IP Address MAC Address Type
---------------- ------------------ ----------
192.168.19.51 00:10:95:04:0a:c4 other
192.168.19.52 00:10:95:04:0a:b7 other
192.168.19.53 00:90:96:00:29:6d other
192.168.19.54 00:10:95:04:0a:c3 other
192.168.19.55 00:10:95:01:ef:d8 other
192.168.19.56 00:a0:73:69:39:65 dynamic
192.168.19.57 00:90:83:36:82:f1 dynamic
192.168.19.58 00:90:96:00:39:f9 dynamic
192.168.19.59 00:90:96:00:39:7f dynamic
192.168.19.60 00:10:95:01:f0:05 dynamic
192.168.19.61 00:90:83:32:9f:8c dynamic
192.168.19.62 00:90:83:36:82:ee dynamic
cli:172.16.19.10:interface:cable:csi(1/1/1)#
cli:172.16.19.10:root# interface 1/1/1
mode: interface:cable:csi(1/1/1)
cli:172.16.19.10:interface:cable:csi(1/1/1)# dhcp-authority 1 start 192.168.19.
51 end 192.168.19.55
cli:172.16.19.10:interface:cable:csi(1/1/1)# show dhcp-authority
row count: 1
Range Number Lower Range Upper Range Status
---------------- ---------------- ---------------- ------
1 192.168.19.51 192.168.19.55 1
DHCP Authority Status enable
cli:172.16.19.10:interface:cable:csi(1/1/1)#