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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-05
Chapter1 Overview of Cisco uBR7200 Series Software
Supported Software Features for the Cisco uBR7200 Series
Defaults This command is disabled by default.
Command Modes Global configuration mode
Command History
Usage Guidelines Prior to using this command, the first (existing) DHCP CPE device maintains its DHCP dynamic MAC
address behind the cable modem. The SID is assigned to this IP address.
However, by enabling Static CPE override, you gain the following states and options on two CPE
devices behind the cable modem.
• The SID definition on the first CPE device is assigned a different static IP address. This enables you
to change the existing (dynamic) DHCP IP address to a static IP address without first clearing the
DHCP CPE host entries from the Cisco CMTS. The CPE IP state changes from dhcp to static cpe.
• This static override allows a second CPE device with a second MAC address behind the same cable
modem with SID1 to be assigned same IP address as the first CPE device.
Note The second CPE device changes from dhcp cpe to static CPE in the CMTS host tables.
Examples The following example enables Cisco CMTS Static CPE Override in the field, enabling more or more
additional CPE devices to be added behind a subscriber’s cable modem:
Router(config)# cable submgmt default active
The following example configures the Cisco CMTS to accept a temporary CPE device, which inherits
and filters by the subscriber’s default downstream cable modem group:
Router(config)# cable submgmt default filter-group cm downstream
The following example configures the Cisco CMTS to accept a temporary CPE device, and to update the
temporary CPE device with the current routing table from the Cisco CMTS:
Router(config)# cable submgmt default learnable
learnable Keyword automatically enables one or more temporary CPE devices to
learn and to operate within the CPE IP address(es) in the Cisco CMTS
routing table.
max-cpe Keyword sets the maximum number of IP addresses to be permitted behind
a cable modem while the Cisco CMTS Static CPE Override feature is
enabled. This keyword enables multiple temporary CPE devices in the
range of 0 to 1024.
Release Modification
12.3(9a)BC This feature was introduced on Cisco uBR10012 and Cisco uBR7200 series
universal broadband routers.