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Configuring
Table 40 Cable Access Router Initialization Sequences and Events (continued)
Sequence | Event | Description |
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4. | Establish IP connectivity. | After the next MAP message broadcast, the router uses |
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| a shared require timeslot to invoke DHCP to establish |
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| IP connectivity with the TCP/IP network at the |
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| headend. |
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| The DHCP server sends a response containing the |
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| router IP address and the IP addresses for the default |
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| gateway, ToD server, and TFTP server, and the |
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| DOCSIS configuration file to be downloaded. |
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| Depending on the particular network configuration, |
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| other information could be provided, such as the IP |
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| addresses for a syslog server or security server. |
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| Note | The DHCP server is typically a dedicated |
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| server at the headend, but it could also be a |
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| CMTS such as a Cisco uBR7200 series |
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| universal broadband router. |
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| The router configures itself for the specified IP address |
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| and gets the current date and time from the specified |
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| ToD server. |
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5. | Establish the time of day. | The cable access router accesses the ToD server for the |
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| current date and time, which is used to create time |
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| stamps for logged events (such as those displayed in |
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| the MAC log file). |
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6. | Establish security. |
| Full Security, a planned enhancement to Baseline |
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| Privacy, is not fully defined nor currently supported by |
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| the DOCSIS specification, and is therefore not |
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| supported by the Cisco uBR900 series. |
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Cisco IOS Multiservice Applications Configuration Guide