[j-nsp] Spanning tree RJ45 SFP on QFX5100

[Darren O'Connor]

Which version of spanning tree? I've got MST running on SFP-Ts running without issue

> From: richih.mailinglist at gmail.com
> Date: Mon, 20 Oct 2014 16:41:02 +0200
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] Spanning tree RJ45 SFP on QFX5100
> 
> Dear all,
> 
> we are not done debugging yet, but as of right now, we are having a
> rather strange effect...
> 
> 
> Our setup looks as follows:
> 
> QFX5100 = CStest
> sw1 = 2960g
> sw2 = 2960g
> sw3 = EX3300
> sw4 = 2960g
> sw5 = 2960S
> 
> CStest <RJ45 1G> sw1
> CStest <SM 1G> sw2
> CStest <SM 10G> sw3
> CStest <RJ45 1G> sw4
> CStest <SM 1G> sw5
> 
> The effect we're seeing is that Spanning Tree works just fine over the
> Single Mode links, but not across the RJ45 SFPs.
> 
> Weirdly enough, LLDP and the like are being transmitted just fine.
> 
> Yes, we tried all available JunOS releases, even a few beta images.
> Yes, we also tried 14.1X53-D10.
> 
> I am kinda stumped as to how this is even possible. While we all hate
> RF45 SFP for various reasons, this is totally new and unexpected.
> 
> 
> Yes, we're still having fun,
> Richard
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