Dell PowerConnect M8428-k Release Notes page 24

Summary User Impact
Non-configuration file Switch does not utilize invalid configuration file
getting loaded to information. Earlier versions of startup-config
startup-config through are not available for fallback when overwritten
HTTP. with an invalid startup-config.
A v6 ping with the v4 Users are not able to ping over 6to4 tunnels using
header destination
IPv6 addresses.
address set to 224.0.0.2
(all routers addr) is not
responded to.
Certain packets match Packets may be transmitted out of order when
system rules that elevate
using priority flow control. Additionally, if the
the priority for protocol
queue that the packets are put on is not enabled
packets.
for lossless PFC, then the packets can be
transmitted even when the port was told to pause.
This may have an effect on connections that
expect packet order to be maintained, e.g. FCoE.
22
Workaround
In this case, an invalid configuration file was
downloaded (on purpose) via the web. When
the switch rebooted, it detected that the
configuration file was invalid and overwrote
the start-up config with the default
configuration (an empty configuration). Users
are advised to maintain off-line copies of
switch configurations.
Users can send pure IPv4 pings to the other
end of the tunnel.
None.
System Firmware Version 4.1.0.6