[j-nsp] 4x1G QSFP?

[Simon Lockhart]

On Thu May 23, 2019 at 02:41:34PM -0500, Chris Adams wrote:
> While looking at the Juniper port configurator for MX204 and MX10003, I
> noticed a 4x1G selection for the QSFP+/QSFP28 ports.  I haven't seen a
> 4x1G QSFP; is that an actual available thing?  For example, I usually
> get modules from FiberStore, and I don't see such there (don't see such
> a Juniper part either).

You can use a QSFP+ 4x10G optic, and configure the ports to run at 1G instead
of 10G. You can even mix-and-match 10G and 1G

simon.lockhart at cr-01.xxx-re0> show chassis hardware
Hardware inventory:
[snip]
FPC 0            REV 24   750-066879   CAKxxxxx          LC2103
  PIC 0                   BUILTIN      BUILTIN           6xQSFPP
    Xcvr 0       REV 01   740-045627   F8xxxxx           40GBASE eSR4

simon.lockhart at cr-01.xxx-re0> show configuration | display set | match 1G
set interfaces xe-0/0/0:3 gigether-options speed 1g

simon.lockhart at cr-01.xxx-re0> show interfaces xe-0/0/0:3 | match Speed
  Link-level type: Ethernet, MTU: 1518, MRU: 1526, LAN-PHY mode, Speed: 10Gbps,
  Speed Configuration: 1G

Simon