4-10
Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter 4 Managing Cable Modems on the Hybrid Fiber-Coaxial Network
Configuring Sync Message Interval
Caution
The system applies filters after the CM registers with the CMTS. Filter definitions are not saved across
system reboots and must be applied each time a CM registers.
The software supports traps to alert CMTS administrators on CMs going offline or back online. A typical
registration and login procedure is shown below:
1.
The CM registers with theCisco uBR10000 series.
2.
The Cisco uBR10000 series sends traps to management systems in use for the network.
3.
The management system sets per modem filters using SNMP or
rsh.
4.
The user logs in at the server.
5.
The login server obtains required modem and CPE information from the Cisco uBR10000 series.
6.
The login server sets per-CPE filter in the Cisco uBR10000 series. The per-CPE filter overrides the
per modem filter settings.
7.
If the CM goes offline for a brief period of time, filters defined using the Cisco uBR10000 series
remain active. If a CM stays offline for more than 24 hours, filter settings are reset.
8.
If the user logs out or the login server detects that the user is not online, the login server sets default
filters for the CM or the CPE device.
Configuring Sync Message Interval
To specify the sync message interval between successive sync message transmissions from the
Cisco uBR10012 router, use the following command in cable interface configuration mode.
Command
Purpose
Step 1
Router(config-if)#
cable
{modem | host |
device}
{<macaddr><ipaddr> | }
access
group
<acl>
Configure access lists to be specified on a per-interface and
per-direction basis. The packets received from cable interfaces and/or
individual hosts are filtered based on the cable interface or the host the
packets are received from. Use
modem
if the device is a CM. Use
host
if the device is a CPE device attached to a CM.
Define the filter to be applied to the device and a given address. The
macaddr
specifies the CM’s or CPE device’s unique MAC address.
Use the
ipaddr
option to specify the CM or CPE device’s current IP
address.
Use the
acl
option to assign the CM or CPE device to an access list.
This defines the per-CM or per-host filter requirements implemented at
the CMTS, rather than at the CM. Access list numbers are 1 to 99 for
fast IP access lists, 100 to 199 for show extended IP access lists.
Note
Access list numbers of 700 to 799 do not apply.
