[j-nsp] Rate selectability on MPC7E-MRATE

[Brian Johnson]

FYI this is a more complex question….

From my understanding, you need to look at the card as 4 groups of 3 ports (2 QSFP+ and 1 QSFP28). Here are your options:

1. All 3 ports can be used at 40G or 4x10G in any combination. So 120G per group or 480G per card. This is the maximum for the card.
2. If you put a 100G optic in the QSFP28 port, the other 2 QSFP ports are not available. So 100G per group with a QSFP28 in them. Assuming only 100G QSFPs in use, the card will do 400G total.

You can mix what each group does to get anywhere from 400G to 480G of capacity from the card.

Correct me if you know better.

- Brian

> On May 6, 2020, at 7:06 AM, sthaug at nethelp.no wrote:
> 
>> we have some MX-Routers (MX480 and MX960) with MPC7E-MRATE
>> linecards. As
>> far as i know, one PFE supports 240G each. Is it possible to use both
>> 100G ports and in addititon 14x 10G ports on a single PFE  ?
>> With the following configuration, i got an error "FPC 5 PIC 1 Invalid
>> port profile configuration":
> 
> You can't oversubscribe the capacity of the MPC7 card. See
> 
> https://www.juniper.net/documentation/en_US/junos/topics/topic-map/preventing-oversubscription-active-physical-ports.html#id-supported-active-physical-ports-for-configuring-rate-selectability-to-prevent
> 
> for permitted port configurations. Note "Oversubscription of Packet
> Forwarding Engine capacity is not supported."
> 
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
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