[j-nsp] MX304 Port Layout

[Mark Tinka]

So, we decided to give the MX304 another sniff, and needed to find out 
why Juniper charge a license for 16x 100Gbps ports per line card, and 
yet the data sheet suggests the box can handle 48x 100Gbps ports 
chassis-wide.

Well, turns out that if you deploy it with redundant RE's, you get 32x 
100Gbps ports (2x line cards of 16x ports each).

However, to take another 16 ports that gets you to 48x 100Gbps ports, 
you need to sacrifice one RE to use its slot :-).

Mark.