Identifying the POS Port in a Switch

switch

Which is the POS port?

I read the juniper-interface pos, there seems have no introduce of it.

I have a Juniper-EX4200 interfaces picture:

The front:
The front

The back:
enter image description here

There I do not find a interface named POS port, so, who can explain for me?

Best Answer

posis a packet over SONET interface.

In the picture that you are attaching there is not a SONET interface, they look like this:

enter image description here

It's a fiber optics interface able to use SONET as signaling and pos is a definition that permits to transport packets over SONET.

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