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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter4 Managing Cable Modems on the Hybrid Fiber-Coaxial Network
Configuring Sync Message Interval
To configure per modem filters, use the following commands in cable interface configuration mode.
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 theCiscouBR10000series.
2. The CiscouBR10000series 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 CiscouBR10000series.
6. The login server sets per-CPE filter in the CiscouBR10000series. 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 CiscouBR10000series
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
CiscouBR10012router, use the following command in cable interface configuration mode.
Command Purpose
Step1 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 cableinterfaces and/or
individual hosts are filtered based on the cableinterface 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.