I found this helpful for the last project that requested this

https://www.juniper.net/documentation/en_US/junos/topics/concept/mpls-features-qfx-series-overview.html

EX4600 rather then the 4500
“EX4600 switches use the same chipset as QFX5100 switches—this is why that EX 
Series switch is discussed here along with QFX Series switches. Other EX Series 
switches also support MPLS but with a different feature set”



From: AusNOG <[email protected]> On Behalf Of Rhys Hanrahan
Sent: Monday, 5 November 2018 2:09 PM
To: Jacob Taylor <[email protected]>
Cc: [email protected]
Subject: Re: [AusNOG] Looking at Juniper core switches

Thanks Jake, appreciate the feedback.

Looks like MPLS is going to be the trickiest to verify – I know previous 
Juniper switches have only had basic MPLS support with hardware limitations 
(e.g. with the EX4500 I believe it only supports single labels so the uses are 
limited). Although the MPLS support on the QFX5100s looks pretty extensive, 
it’s unclear for example if you can do VPLS on these units. Apparently you can 
do E-VPN but only using VXLAN as the transport, not MPLS.

Thanks.

Rhys Hanrahan
Chief Information Officer
Nexus One Pty Ltd

E: [email protected]<mailto:[email protected]>
P: +61 2 9191 0606
W: http://www.nexusone.com.au/
M: PO Box 127, Royal Exchange NSW 1225
A: Level 10 307 Pitt St, Sydney NSW 2000

[ttp://quintus.nexusone.com.au/~rhys/nexus1-email-sig.jpg]


From: Jacob Taylor <[email protected]<mailto:[email protected]>>
Date: Monday, 5 November 2018 at 2:07 pm
To: Rhys Hanrahan <[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: Re: [AusNOG] Looking at Juniper core switches

We our fair share of QFX5100s about the place, mainly using MC-LAG and BGP 
features, in addition to VC in other deployments.

We've had some hardware defects previously but they were swiftly resolved 
through JTAC.

For BGP (and I think MPLS) you need a separate Advanced Features License.

Can’t say much for CoS.

FYI I believe you can only use either MC-LAG or VC, not both at the same time. 
Happy to be proven wrong though.

Additionally they support VC Fabric in a spine/leaf topology, allowing the 
entire network to effectively act as one giant switch.
Unsurprisingly this is yet another license though.

While we primarily deal with another vendor in L3 VXLAN deployments 
(Mellanox/Cumulus) the switches are certainly capable of VXLAN and EVPN.

Cheers,
Jake

On 5 Nov 2018, at 1:52 pm, Rhys Hanrahan 
<[email protected]<mailto:[email protected]>> wrote:

Hi All,

Just wanted to see if anyone has any experience or recommendations on some core 
switches. We’re looking at upgrading our core switches in Sydney and right now 
I’m looking at Juniper models. Right now, we need a model with at least 40x 
10/1 Gbps ports, and the ability to do Virtual Chassis, MC-LAG and CoS queueing 
per port. We’re currently using Juniper EX4500s.

At the moment I am looking primarily at: Junper’s QFX 5100-48S as our 
replacement. From everything I’ve seen this looks like a solid option to go 
with and gives us a path to add more functionality to our core network over 
time. If anyone has any feedback on this particular model I’d be really keen to 
hear it. In particular I’m interested in:


  *   48x 10/1Gbps + 6x 40 Gbps QSFP ports.
  *   Virtual chassis via QSFP ports, enabling MC-LAG to our top of rack 
switches.
  *   Looks to have full CoS support.

So unless there’s any major caveats this is probably what we’ll go with. In 
terms of future feature use this seems to cover us as it appears to have:


  *   Pretty much full MPLS support (I’m relatively green with MPLS but we 
likely want to move to an MPLS core in the future, and this looks to support 
everything we’d potentially want). Except perhaps BFD for MPLS.


  *   Full VXLAN Support – another feature we would probably leverage if we 
went to a full MPLS core, with spine-leaf configuration.


  *   I plan to get rid of virtual chassis eventually and go all layer 3/MPLS 
instead.

As far as I understand for VXLAN rollouts, you need VXLAN on the top of rack 
switches to act as VTEPs. So for a second phase of upgrades, we would likely be 
looking at QFX5100-48S for all our top of rack switches, and these core QFXs 
would be swapped with dual QFX 5100-24Qs

Any feedback or advice would be appreciated.

Thanks!

Rhys Hanrahan
Chief Information Officer
Nexus One Pty Ltd

E: [email protected]<mailto:[email protected]>
P: +61 2 9191 0606<tel:+61%202%209191%200606>
W: http://www.nexusone.com.au/
M: PO Box 127, Royal Exchange NSW 1225
A: Level 10 307 Pitt St, Sydney NSW 2000

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