Asus AC87U ARP requests waking Synology NAS

[vanq69er]

Hi all,

After much investigation I have found that my AC87U is waking my DS413 NAS every hour with an ARP broadcast;

5689 60.171866 AsustekC_92:d3:20 Broadcast ARP 60 Who has 192.168.1.113? Tell 192.168.1.1

Apparently the NAS is hardcoded to wake and reply however, I was wondering if it is possible to change the ARP broadcast timing to say 4 hours or disable it for the NAS IP/MAC?

The NAS has a static IP and is outside the DHCP addressing. What is the ARP broadcast for?

Thanks, any help is much appreciated!

 

[vanq69er]

Forgot to mention I am running Merlin Firmware 380.57.

 

[vanq69er]

I have set a static arp for the NAS but it still wakes

 

[sfx2000]

After much investigation I have found that my AC87U is waking my DS413 NAS every hour with an ARP broadcas

a) why is your NAS sleeping - either on-line or off-line - make a decision here...

b) this is normal for all clients - the main router is asking who is what...

 

[vanq69er]

its sleeping because im sleeping! its not in use overnight so to save drive wear and power usage I let it hibernate. Is this unusual for a home NAS?

yeah I understand but it has a static ARP entry so is it possible for it to skip the NAS IP?

 

[sfx2000]

its sleeping because im sleeping! its not in use overnight so to save drive wear and power usage I let it hibernate. Is this unusual for a home NAS?

Idle drives use little power, and the failure point for them is the spin-up/spin-down cycles... so...

There was an issue with Synology where updates on the network side (DHCP/ARP) would cause a file to be written on the disks, hence the spin-up... the work-around there was to set a static IP on the NAS box, rather than DHCP...

 

[vanq69er]

Yeah unfortunately its in my room so I like it being quiet overnight but yeah the hourly hdd power ups and down will kill the drive life.

yeah it has a static IP outside of the DHCP allocation range. still tries to respond to the ARP broadcast.

 

[sfx2000]

I like it being quiet overnight but yeah the hourly hdd power ups and down will kill the drive life.

spinners/rust drives are pretty quiet when they're idle.... it's the access stuff that makes them noisy...

 

[vanq69er]

yeah its the damn fans that make all the noise, I have tweaked the fan control file but my room is fairly warm

 

[vanq69er]

Synology support says the only solution is to tweak the ARP broadcast interval. Is this possible with the Merlin firmware on the AC87U

 

[vanq69er]

Downgraded to 378.54_2 and it sleeps like a baby!

 

[PhilipJD]

I also downgraded to 378.54_2 and it seems to be working.