Huawei AR3200 Series Configuration Manual page 89

Huawei AR3200 Series Enterprise Routers
Configuration Guide - Device Management
The Auto-Config process involves three phases:
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Issue 03 (2011-11-27)
Parsing Options
1. Obtain the IP address and configuration of the FTP or TFTP server.
A router automatically enables the DHCP client function on the uplink Ethernet
interface in Up state, and broadcasts DHCP Request packets (assuming that an IP
address pool, Option parameters, and gateway information have been configured on
the DHCP server). Then the DHCP server sends the related configurations to the
router, including the IP address assigned to the router, IP address of the FTP or TFTP
server, FTP user name and password, and default gateway address.
If no DHCP Reply packet is received or the received DHCP Reply packet is invalid,
a DHCP Request packet is sent every 5 minutes. After 24 hours, a DHCP Request
packet is sent every hour.
2. Parse Option parameters.
a. If the received DHCP Reply packet contains Option 43, ACS information needs
to be configured. After the basic ACS configuration is complete, the Auto-Config
process ends, and Auto-Config is suspended to wait for ACS deployment.
b. If the received DHCP Reply packet does not contain Option 67, the intermediate
file needs to be obtained. Then the router downloads the intermediate file
arnet.ini from the FTP or TFTP server and obtains information about the files
to be downloaded from the intermediate file. Subsequently, the process of
obtaining files is started.
c. If the received DHCP Reply packet contains Option 67, the process of obtaining
files is started.
Obtaining files
1. (Optional) Download a system software.
If the space is insufficient, delete version files from the file system according to the
setting of Option 146.
After a system software is downloaded successfully, it is automatically set as the
system software for the next startup.
If the system software fails to be obtained, it is downloaded once every 30 minutes.
If it cannot be obtained after 3 days, it is downloaded once every 2 hours. If it cannot
be obtained after 30 days, the process of downloading the system software stops and
waits to be handled manually.
2. (Optional) Download a patch file.
After the patch file is downloaded successfully, it is automatically set as the patch file
for the next startup.
If the patch file fails to be obtained, it is downloaded once every 30 minutes. If it
cannot be obtained after 3 days, it is downloaded once every 2 hours. If it cannot be
obtained after 30 days, the process of downloading the patch file stops and waits to
be handled manually.
3. Download a configuration file.
After the configuration file is downloaded successfully, it is automatically set as the
configuration file for the next startup.
If the configuration file fails to be obtained, it is downloaded once every 30 minutes.
If it cannot be obtained after 3 days, it is downloaded once every 2 hours. If it cannot
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