[j-nsp] Junos: snapshot ?

[Julien Goodwin]

On 04/03/14 20:39, R S wrote:
> A customer of mine runs MX960 (dual RE), SRX5800 and SRX3600 (cluster with dual RE), EX8200 (dual RE) and EX4200 (in VC), in the weekend will run a disaster recovery test powering off those devices.
> I’d like to avoid any problem with files corruptions, which is the safer command to use to save current file systems of those devices family ?
> 
> request system snapshot  <enter>

Snapshots won't help this. Snapshots aid recovery, they don't prevent
corruption.

> Can I ask to run this command in production time on all the mentioned devices ?

Sure, on the EXen it can be a little slow, but should be 100% safe.
Remember to run it on both RE's on dual-RE platforms.

You may need "slice alternate" on the end of the command for the EXen,
and the exact command depends on JunOS release.

> Any additional suggestion ?

Make sure you actually have matching JunOS on all RE's in a
chassis/cluster/VC.

Ditto any scripts commit, event, etc.

If you're using fxp0 ensure both RE's have it patched.

Ensure "system commit synchronise" is set on all dual-re platforms.

Make sure rancid (or your equivalent) is actually working and has
current configs for all devices, sadly there's still a good chance of
corruption needing a rebuild on EX[34]200 after power loss.

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