Medias Mediatrix 1204, Справочное руководство

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Configuration File Download Server Reference Manual (SIP Version)
Mediatrix 1204 159
Configuration Download via TFTP
The following steps explain how to download configuration files by using the TFTP protocol.
X
To download configuration files via TFTP:
1. Set the configuration file server host and port as defined in “Configuration File Server Settings” on
page 153 .
2. Place the configuration files to download on the computer hosting the TFTP server.
These files must be in a directory under the TFTP root path.
3. If not already done, set the configuration file path as described in “Setting up the Configuration File
Download” on page 155 .
4. In the configFileFetchingMIB, set the configFileTransferProtocol variable to tftp .
5. In the groupAdminMIB , set the groupSetAdmin variable to ForceLock .
All activities in progress on the Mediatrix 1204 are terminated immediately and the unit enters the
maintenance mode (the value of the
groupAdminState variable is “locked”). The configuration file
download may take place.
6. In the sysAdminMIB , initiate the configuration file download via TFTP by setting the
sysConfigCommand variable to updateConfiguration .
The Mediatrix 1204 immediately downloads the configuration files. It is the initiator of the TFTP
sessions.
NAT Variations
NAT treatment of UDP varies among implementations. The four treatments are:
• Full Cone: All requests from the same internal IP address and port are mapped to the same
external IP address and port. Furthermore, any external host can send a packet to the internal
host by sending a packet to the mapped external address.
• Restricted Cone: All requests from the same internal IP address and port are mapped to the
same external IP address and port. Unlike a full cone NAT, an external host (with IP address
X) can send a packet to the internal host only if the internal host had previously sent a packet
to IP address X.
• Port Restricted Cone: Similar to a restricted cone NAT, but the restriction includes port
numbers. Specifically, an external host can send a packet, with source IP address X and
source port P, to the internal host only if the internal host had previously sent a packet to IP
address X and port P.
• Symmetric: All requests from the same internal IP address and port, to a specific destination
IP address and port, are mapped to the same external IP address and port. If the same host
sends a packet with the same source address and port, but to a different destination, a
different mapping is used. Furthermore, only the external host that receives a packet can send
a UDP packet back to the internal host.
For more details on NAT treatments, refer to RFC 3489.
Note:
The configuration download via TFTP can only traverse NATs of types “Full Cone” or “Restricted
Cone”. If the NAT you are using is of type “Port Restricted Cone” or “Symmetric”, the file transfer will not
work.