Ahh sounds like one of many bugs in the early release of the 3850 series.  Do 
you know what code they are on?

-----Original Message-----
From: Aaron Gould [mailto:aar...@gvtc.com] 
Sent: Thursday, August 24, 2017 8:37 PM
To: Nick Cutting <ncutt...@edgetg.com>; cisco-nsp@puck.nether.net
Subject: RE: [c-nsp] cisco 3850 eigrp - sending goodbye - can't ping any 
224.0.0.10

This message originated from outside your organization

Thanks Nick, to begin with please keep in mind, this was fine for a year or 
more, until last night when they replaced a 3750, with a 3850.

They have 6840's, 6509's, 3750's, and 3850's... they are all eigrp neighbors 
fully meshed.

I'm the SP.  I provide this customer a mpls vpls rfc4762 (bgp ad w/ldp sig).
(I have a mix of cisco me3600's and juniper acx5048's providing that vpls
elan) All those cisco devices mentioned above are the customer edge.

On all those ce's is an untagged L3 interface.  All those ce interfaces eigrp 
neighbor with all others.

I tried on 2 other ce devices and COULD ping 224.0.0.10 and get responses from 
all other ce's.

BUT, on that one 3850-24 port, when I pinged 224.0.0.10, it died immediately 
with "." one failure, and that's it.  Strange.

Yes, I did do a static eigrp neighbor between the 3850-48port and the 
3850-24port and the neighbor stayed stable for over 3 minutes (previously, the 
goodbye eigrp teardown was happening every 80 seconds)

I don't have access at the moment, it's the customer gear and they allow me 
remote access only when they need my help.  I told them to take my findings and 
call the cisco tac

-Aaron


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