[AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

I've got a Cisco ME3600X switch connected up to a pair of Cambium  
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant  
outdiscards, resulting in lost frames on the switch on both ports  
going to the 820S radios.  The links are not congested--generally  
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).   
I've got other 820S radios connected to the same model switch in other  
places, and am not seeing this.  The only difference is that this  
switch is fed with 10 gig fiber.  I'm wondering if it's a queueing  
problem of some sort.  Anybody have any ideas?

Craig