Before using the expansion cards in my virtual chassis ( 3 x EX4600), i search documentation on juniper sites .... I found a document quite short, saying the cards have hot swap capabilities and no particuliar warning.
So I've inserted the cards (1 by switch) .... and the switches begin a reboot process stoping te full VC !
Is this the correct behavior ? if yes this should be indicated in the docs ....
Here is document for adding/removing the expansion cards.
However, there is a note mentioned as below:
The EX4600 is configured for the QFX-EM-4Q by default, but any combination of the two modules is supported. Expansion modules can be hot-inserted or hot-removed. However, when an EX4600-EM-8F is inserted instead of the default QFX-EM-4Q, the PFE reboots and all of the interfaces on the switch and expansion module temporarily go down. Likewise when an EX4600-EM-8F is running on the EX4600 and it is swapped with a QFX-EM-4Q, all of the interfaces temporarily go down, which can cause a short disruption in traffic.
Was this the case in your scenario ?
If this solves your problem, please consider to mark this post as "Accepted Solution".
Hi JL Oms,
I checked our documentation and this is expected behaviour.
Hope this helps.
Please mark "Accept as solution" if this answers your query.
Kudos are appreciated too!
there is always a difference in what is supported and what is working correctly. Hot-swapping a module is such a case, it CAN and SHOULD work with supported platforms, but depending on the stability of the code, sometimes it just does not work.
If you want to be safe, plan a maintenance window for this, halt the device, plug in the module(s) and reboot the device. This works all of the time.
Ok ... I have read too quickly the doc .... thanks for the answer.