[j-nsp] MS NLB multicast mode and EX 12.x new behaviour issues

[Tarko Tikan]

hey,

> EX also had no support for
> the equivalent of Cisco's 'bpdufilter', and working around that with manual
> ethernet-switching family filters in 11.4 has been a mixed experience.

By 'mixed' you surely mean painful. E-s filters do not work for STP, 
period. STP traffic is captured to RE first, bypassing all ingress 
filters and is then sent out from RE to be flooded as normal multicast.

If you need bpdufilter on EX, you have to use the proper knob that was 
introduced in 12.2, otherways it's just useless.

-- 
tarko