On 12.01.2016 18:18, Stas Sergeev wrote:

12.01.2016 20:06, Hannes Frederic Sowa пишет:

quoted

On 12.01.2016 17:56, Stas Sergeev wrote:

quoted

12.01.2016 19:42, Stas Sergeev пишет:
Also the rfc1620 you pointed, seems to be saying this:

                  A Redirect message SHOULD be silently discarded if the
                  new router address it specifies is not on the same
                  connected (sub-) net through which the Redirect arrived,
                  or if the source of the Redirect is not the current
                  first-hop router for the specified destination.

It seems, this is exactly the rule we were trying to find
during the thread. And it seems violated, either. Unless I am
mis-interpreting it, of course.

If you read on you will read that with shared_media this exact clause (the first of those) is not in effect any more.

OK. But how to get such a redirect to work, if (checked with
tcpdump) the packets do not even go to eth0, but to "lo"?

I don't know, the router must be on the same shared medium. I guess 
physical reconfiguration is required?

Aren't there arp request for the host on eth0?

And how to deal with the above quote from rfc1812?

quoted

I don't know why shared_media=1 is the default in Linux, this decision was made long before I joined here. Anyway, with shared_media=1 this is absolutely the required behavior.

Then it should work. How? :)

What should work? Sorry, I can't follow you. Everything looks fine to 
me. The default is shared_media, so servers send such redirects and 
client accept those. If it would be 0 the rfc1812 applies and should 
stop servers to send such redirects and clients to accept those.

Bye,
Hannes