RB450G and linksys SRW2016 with LACP and VLAN tagging

RouterOS General
1

hi,

i have a problem with the connection between my switch and router.
i want to set up a bond with LACP on both sides.
only this bond works, but if i create vlan IFs on this bond i have crazy situation.
some vlan IFs work and some not. i think the switch or the router send packets over an port of the bond where the other side not expect it.
so some packets dropped from one of the sides. it is localized that some switchports work and some not, so i think the switch makes the loadbalancing and the routerOS does not accept these packets.
that is very strange because LACP does not expect packets on a specific port.
is the implementation of LACP in routerOS a little bit strange ?
if i disconnect one cable so the lacp channel is in degraded mode all works fine.
it’s definitly some with the loadbalancing.

i use router os 4.10 but this issue exist since my first test with 4.6.

have someone an idea ?
i would change my setup to another setup if that works.
i want use both links for loadbalancing and the redundancy that one port goes down and everything works.
my old setup that works is simply an active-backup bond and thats not so sweet :wink:

thanks,
timtasse

2

what do you expect from LACP? if your hardware is okay, static mode (for example, bonding-xor on MT side) is much faster, from my investigations :slight_smile:

3

i have a problem with bonding-xor, too.
if i disconnect one cable then the half packets are lost.
i have configured it for mii-type 1 for monitoring.
the router does not disable the disconnected port in the bond.
on the switch side i see that he put the port out of the channel.

4

try mii-type 2… =)

I was testing it with RB450G a few month ago, it was working perfectly =)

5

ok your right

with mii-type 2 it works exactly as expected.
its not so cool that the standard lacp not work but its ok for me with static channel.

thanks

6

as I said, for me static settings had shown much lesser time of reaction on link state change. one need LACP in two cases: either his hands are not so straight and he can push the cable into the wrong hole, or he’s using old-style media converter on the link, that does not shutdown ethernet port in case of fiber link failure