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Riverstone Networks RS Switch Router User Guide Release 8.0 7-21
CMTS Configuration Guide Anti-Spoofing
7.8.2 Anti-IP-spoofing
Anti IP-spoofing prevents CPE's on the same network segment from cloning other CPE addresses. In this example,
anti-spoofing prevents CPE #1 from cloning CPE #2’s IP address.
Here is the configuration for the RS:
! Configure the RS
cmts set headend cm.5.1 hashed-auth-str hbCgHB
cmts set uschannel cm.5.1 upstream 1 state on
! Configure the VLANs
vlan create dhcp port-based
vlan create cmts port-based
vlan add ports et.1.1 to dhcp
vlan add ports cm.5.1 to cmts
! Create the interfaces
interface create ip dhcp address-netmask 50.1.1.1/16 vlan dhcp
interface create ip cmts1 address-netmask 50.2.1.1/16 vlan cmts
et.1.1
cm.5.1
50.1.1.1
DHCP SERVER 1
RS
DDEEFF: 000001 / 50.2.1.X
MODEM #1
CPE #1
DDEEFF: 000002 / 50.2.1.X
MODEM #2
00AOCC: D5B3A / 50.2.1.92
CPE #2
00BOCC: D6B4A / 50.2.1.91
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