Riverstone Networks WICT1-12 - Manual (Page 127)

Riverstone Networks RS Switch Router User Guide Release 8.0 7-15
CMTS Configuration Guide CMTS Configuration Examples
7.7.2 Example Two: Multiple ISPs with multiple DHCP servers
The advantages of this type of configuration are that each ISP manages its own DHCP server, and ISP selection is
transparent to the user. The disadvantage is that the MAC to IP address mappings must be mutually exclusive.
Otherwise, DHCP conflicts will result.
Following, is the configuration:
! Configure the RS
cmts set headend cm.5.1 auth-str DOCSIS
cmts set uschannel cm.5.1 upstream 1 state on
! Configure the VLANs
vlan create AMERILINK port-based
vlan create MOONLINK port-based
vlan create CMTS port-based
vlan add ports et.1.1 to AMERILINK
vlan add ports et.1.2 to MOONLINK
vlan add ports cm.5.1 to CMTS
interface create ip AMERILINK address-netmask 50.1.1.1/16 vlan
AMERILINK
interface create ip MOONLINK address-netmask 80.1.1.1/16 vlan MOONLINK
! The RF interface has overlapping subnets, one for AMERILINK and the other for
! MOONLINK
interface create ip CMTS address-netmask 50.2.1.1/16 vlan CMTS
interface add ip CMTS address-netmask 80.2.1.1/16
ip helper-address interface CMTS 50.1.1.100
ip helper address interface CMTS 80.1.1.100
et.1.1 et.1.2
cm.5.1
MOONLINK +
DHCP Server
80.1.1.1
AMERILINK +
DHCP Server
50.1.1.1
AABCC:000001/50.2.1.101
AAMERILINK MODEM #1
AABBCC:000002/50.2.1.102
AMERILINK MODEM #2
DDEEFF:000001/80.2.1.101
MOONLINK MODEM #1
DDEEFF:000002/80.2.1.102
MOONLINK MODEM #2
RS
50.2.1.1/80.2.1.1