Displaying And Debugging Tftp; Xmodem Configuration - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
Note:
You may specify a source IP address for the packets sent by the FTP server with the
tftp source-interface command or with the tftp source-ip command. If both
commands are configured, the one configured later overrides the former.

5.4.3 Displaying and Debugging TFTP

After completing the above configurations, execute the display command in any view
to verify them.
Table 5-20 Display and debug TFTP
Display the current source IP address of
the TFTP client

5.5 Xmodem Configuration

Xmodem is a file transfer protocol widely adopted for its simplicity and good
performance.
Xmodem transfers files through serial interfaces. It supports:
Two data packet sizes: 128 bytes and 1 KB
Two check methods: generic checksum and cyclic redundancy check (CRC)
Retransmission when error occurs (normally, 10 times)
Xmodem comprises receiver and sending programs. The following is how it operates:
1) The receiver sends a negotiation character to negotiate check method.
2) After the negotiation is passed, the sender starts sending packets.
3) When a complete data packet is received, the receiver checks it with the
agreed-upon check method. If the check is passed, it sends an ACK asking the
sender to send the next packet. If the check fails, it sends a NAK asking the sender
to retransmit the packet.
V 2.41 implements the receiving program of Xmodem. It is used on the AUX port,
supporting 128-byte packets and CRC check. The sending program is integrated in the
HyperTerminal.
You can use Xmodem to upgrade the Boot ROM program, V 2.41 program and
configuration file.
Operation
3Com Corporation
5-16
Chapter 5 File Management
Command
display tftp source-ip