Release 1.0
Configuring the CMTS
526360-001-00 Rev. B
MGBI
6-7
3.
Optionally use the
cable helper-address mta
command in Interface
Configuration mode to configure a secondary helper IP address for the
Multimedia Terminal Adapter (MTA) device to forward only UDP broadcasts:
MOT(config-if)#
cable helper-address
<
A.B.C.D
>
mta
where:
A.B.C.D
is the destination DHCP server IP address.
4.
The IP helper address necessary for the BSR to forward packets to the DHCP
server. Use the
ip helper-address
command in Interface Configuration mode to
forward default UDP broadcasts including IP configuration requests to the DHCP
server:
MOT(config-if)#
ip helper-address <
A.B.C.D
>
where:
A.B.C.D
is the destination DHCP server IP address.
5.
Use the
show
ip dhcp stats
command in Interface Configuration mode to display
information about DHCP upstream and downstream port statistics:
MOT(config-if)#
show ip dhcp stats
Configuring Multiple ISPs
The DHCP-relay agent, which is the router between the cable interface and DHCP
server, monitors DHCP CPE host requests for the presence of the Vendor Class
Identifier (VCI) also known as “DHCP Relay Option 60”. Vendors define a VCI to
optionally identify the DHCP client vendor type and configuration information. For
example, if a VCI identifies a DHCP client as a Multimedia Terminal Adapter (MTA)
device, the DHCP server can put all MTA devices that are on a cable interface into the
same subnet.
Note:
The IP helper address must be entered for the DHCP Lease Query
function to work regardless of whether the relay agent option is used.
Summary of Contents for BSR 2000
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