Switching

Hi,

In the context of QFX 51xx platforms - what is a "TVP image" vs "non-TVP image"? 

For example: "

Downgrade from TVP image to non-tvp image is not supported. Upgrade from non-tvp to TVP is supported.

"

Reagrds,

Pawel Mazurkiewicz

Hi Pawel,

There was a change on some Junos products some time ago, mainly QFX, with the introduction of the TVP architecture on newer codes. These were different kernel and internal components optimizations on these platforms added by the engineering teams. You may not find any public documentation as this as they are Juniper hardware build specifications. However, you can differentiate the codes as VTPs show as "qfx-5e-". Example: jinstall-host-qfx-5e-x86-64-19 vs jinstall-host-qfx-5-19

 I am also adding some PRs regarding the error you are getting:

https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1248145

https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1345848

Best regards!

If that clears your concerns, please mark as solved

Hi Pawel,

Any chance you could elaborate on TVP architecture as the QFX5110 only supportss a TVP image (5e) and has a major impact bug Pr1426737 where upgrade is the only fix path from the JTAC recomended software.

Any chance there is an understanding presentation/explaination, just the TVP basics if thats not a contridication.

As @egarro stated, all [most] newer products support [only] the newer and improved TVP archietcure.  QFX5100 was only product in QFX family that was caught with support for 2 archiectures.  To keep backwards, as well as forward, compatiabilty for mixed VC and VCF, for the QFX5110 (the Spine in VCF) 5e is explicately called out as "informational".  Reason is:

You can not mixed in the QFX5100/5110 family a 5e and a non-5e in any mixed VCF/VC.  QFX5110 will call out 5e explicately for this reason, while all [at least most] other products supporting the newer TVP archiecture will not.

Once you convert any QFX5100 to 5e TVP archiecture, that switch can now ONLY be used with other 5e switches, in a VC or VCF, and return to non-5e is not supported.  This is all informational [warning?] so that [only] QFX5100 customers do not run into issues.

The details of the archiecture are Juniper propritary as is the SW archectuture for Junos or newer EVO.

HTH

Thanks egarro 🙂 

Kind regards,

Pawel