Below is the steps that I used to download files from vrf enabled 6800 chassis to my mac laptop:
1, Enable tftp server in OS x:
sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist
sudo launchctl start com.apple.tftpd
By default use private/tftpboot/ filefolder for tftp download and upload:
sudo chmod 777 /private/tftpboot
sudo chmod 777 /private/tftpboot/*
2, setup tftp route in 6800
I want to download/upload from/to mgmt port, mgmt port belongs to a separated management vrf. In order to make tftp server IP routed correctly, we need add the following configuration into the chassis:
cat6k#ip tftp source-interface mgmt0
3, Now it is ready for tftp download/upload to OS x from/to vrf enabled Chassis.
cat6k#copy running-config tftp://172.27.x.x
Address or name of remote host [172.27.x.x]?
Destination filename [xxx-confg]? running-config
85918 bytes copied in 1.084 secs (79260 bytes/sec)