[j-nsp] Juniper QFX5200-32c and QSFP28 channelized optics

[Chriztoffer Hansen]

I can confirm using a QSFP+ to SFP+ adapter works, too. (Lane 0 being wired
to the front, lane 1-3 are not used)

With the following configuration

fpc 0 {
    pic 0 {
        /* Set in groups of four, e.g. 0-3, Here 8-11 */
        port 8 {
            channel-speed 10g;
        }
        port 9 {
            channel-speed 10g;
        }
        port 10 {
            channel-speed 10g;
        }
        port 11 {
            channel-speed 10g;
        }
    }
}

With the following type of converter optic. Example -
https://www.fs.com/de-en/products/72582.html (QSFP+ to 10G SFP+)
https://www.fs.com/de-en/products/178066.html (QSFP28 to 25G SFP28)

(This is on 5120-32c)

On Tue, 9 Jan 2024 at 15:39, Richard McGovern via juniper-nsp <
juniper-nsp at puck.nether.net> wrote:

> For 10G support, you need to use a 40G [proper] Optic and channelize this
> to 4 x 10G.
>
> Just FYI. Rih
>
> Richard McGovern
> Sr Sales Engineer, Juniper Networks
> 978-618-3342
>
> I’d rather be lucky than good, as I know I am not good
> I don’t make the news, I just report it
>
>
>
>
> Juniper Business Use Only
>
> On 12/29/23, 12:44 PM, "Lee Starnes" <lee.t.starnes at gmail.com> wrote:
> Thanks for the info and links Tobias. really helpful. It must just be a
> Juniper thing that it supports only 25G because on Cisco and Mikrotik it
> supports down to 1G. Anyway, at least I have answers and a solution.
>
> Best,
>
> -Lee
>
> On Fri, Dec 29, 2023 at 1:31 AM Tobias Heister via juniper-nsp <
> juniper-nsp at puck.nether.net<mailto:juniper-nsp at puck.nether.net>> wrote:
>
> > Hi,
> >
> > While it sometimes works to let 25G transceivers run at 10G (depending
> > on Transceiver and Device(s)) i think in this case you will need a
> > different transceiver.
> >
> > See e.g. HCT for reference:
> > https://apps.juniper.net/hct/product/?prd=QFX5200-32C
> >
> > the PSM only lists 25 and 100 as being supported:
> > https://apps.juniper.net/hct/model/?component=JNP-QSFP-100G-PSM4
> >
> > For 10G SM Breakout something like
> > https://apps.juniper.net/hct/model/?component=JNP-QSFP-4X10GE-LR would
> > be the way to go.
> >
> >
> > regards
> > Tobias
> >
> > Am 29.12.2023 um 02:38 schrieb Lee Starnes via juniper-nsp:
> > > Hello everyone,
> > >
> > > I am running into an issue on our QFX5200 switches where I have
> > installed a
> > > QSFP-100G-PSM4 optic. This can do 1G/10G/25G on the 4 channels. My
> issue
> > is
> > > that I am not able to get the interfaces to go to 10G even though I
> have
> > > set them as such.
> > >
> > > If setting all 4 channels to 10G only a single interface shows at 100G.
> > If
> > > I set them all to 25G, all 4 show as 25G. Then if I change one of the
> > > channels to 10G, all 4 remain as 25G.
> > >
> > > Is this an issue with how I am setting this up or an issue with the
> type
> > of
> > > Optic being used? Below is the config for the ports in the last state I
> > > tested.
> > >
> > > chassis {
> > >      fpc 0 {
> > >          pic 0 {
> > >              port 0 {
> > >                  channel-speed 10g;
> > >              }
> > >              port 1 {
> > >                  channel-speed 25g;
> > >              }
> > >              port 2 {
> > >                  channel-speed 25g;
> > >              }
> > >              port 3 {
> > >                  channel-speed 25g;
> > >              }
> > >
> > > Thanks for any info or documents you can point me to.
> > >
> > > Best,
> > >
> > > -Lee
> > > _______________________________________________
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