Release 1.0
Configuring the CMTS
526360-001-00 Rev. B
MGBI
6-9
mta
optionally defines this secondary IP MTA address as the giaddr to be
inserted into MTA DHCP requests.
Selecting a Specific ISP
The multiple ISP feature requires significant coordination between the operator's
provisioning system and the BSR. The following is a high level walkthrough of the
use of this feature:
1.
The operator configures the BSR and their provisioning system correctly
2.
The customer powers up the CM
3.
The CM sends a DHCP request to the cable helper-address defined for
cable-modems. The giaddr value is set to that of the primary interface on the
cable interface.
4.
The DHCP server assigns an IP address to the CM using the giaddr value.
5.
The customer's CPE sends a DHCP discover to cable helper-address defined for
hosts. The giaddr value is set to that of the first secondary ip address defined for
the interface.
6.
The DHCP server assigns an IP address for the CPE using the giaddr value.
7.
The CPE traffic is now directed to a configuration server which allows the
customer to select the ISP provider.
8.
The configuration server saves the information related to the customer's ISP
selection.
9.
The CM and CPE must now be power cycled to force both devices to initiate the
DHCP process again.
10.
The CM sends a DHCP request to the cable helper-address defined for
cable-modems. The giaddr value is set to that of the primary interface on the
cable interface. Since the provisioning server now knows the ISP that the
customer selected, it assigns the CM an IP address on a sub network that is
associated with the ISP provider.
Note:
The BSR supports 128 secondary IP subnets per cable bundle. The
maximum number of IP subnets that can be configured on the BSR chassis is
1024.
Summary of Contents for BSR 2000
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