Hello!
James Carlson schrieb am Tue, 13 Jan 2015 17:22:47 -0500:
Ah, ok. Are you referring to the individual link MTU rather than the
bundle's overall MTU?
Yes.
If so, then, yes, that does look like a problem. It should be possible
to limit individual link MTU values as desired, but I don't see a good
way to do it.
Me neither, at least without introducing a system-specific ioctl that
would have to be explicitly called by pppd. However, perhaps anyone
has a better idea...
By the way, how does Solaris solve this problem? I see that PPPIO_MTU
is sent in tty_send_config() in sys-solaris.c for setting the link
MTU. Is that used when doing multilink PPP? The corresponding function
in sys-linux.c does not send the link MTU to the kernel, it only saves
the value in a global static variable "link_mtu" (line 1250) which is
not used anywhere else.
But, for what it's worth, running MP over a tunneled link sounds like
extreme weirdness to me. Unless you're trying to set new records for
packet loss and link latency, why would you do that?
Don't ask me, ask Matthias-Christian ;-)
But nevertheless there is no obvious reason why it should be
impossible to make it work.
Regards,
Christoph
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