Losing ping when transferring a file from File Zilla FTP Server to client (using IPv6)

[KurtArapa]

Hi all,

I am doing a project for school. I have done a visualized setup on GNS3 using the 6to4 mechanisms (using four Cisco 7200 images). Basically IPv6 is routed to IPv4 and then back routed tp IPv6. Basically at one end I have an FTP Server and at the other end a client, both with IPv6 addresses. The FTP transfer works but it's very slow. I have noticed that during the transfer I am losing some pings from the VMs. After the FTP is done 0 no pings will be lost. I have done a similar setup using IPv4 but this issue is not happening. I am losing pings while downloading/uploading the file from the FileZilla FTP Server only. Can this be an issue with filezilla since I am using IPv6 addresses?

Images of setup attached.

Please help.

[KurtArapa]

*1030::2 is the FileZilla FTP Client
*1040::2 is the FileZilla FTP Server
All firewalls were disabled on the Windows Server and Windows 10 machines. No access-list on the routers were configured.

Please help. Thanks

[botg]

Looks like at least one link is saturated. Due to congestion packets can be dropped, which includies ping packets.

[KurtArapa]

botg,

Thanks for your reply

What do you think I can do to fix this issue?

[botg]

Figure out which link is congested and increase its capacity.