Microservers disconnect after installing gigabit switch

joey1211

joey1211

joey1211

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I've replaced a 10/100 hub with a Netgear Gigabit Switch. I have two HP microservers running Synology DSM 4.2.

When I ping them from my pc only one of them is accessible at any time and this for only a few seconds until it times out and for the other to reply. Another few seconds and they swop over again.

Any ideas?
 
Manually. The only change is the new switch. Taking either one off the network means the other works as normal.

Putting the old hub back in place and everything works.
 
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Yes, the MAC addresses are the same. Is it hard written into the software on the USB stick?
 
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Isn't the MAC address embedded in the NIC in the factory?

Or does everyone running DSM on their microserver have the same MAC address?
 
The conflict has resurfaced but I have not changed anything on the boot usb stick. Here are the contents of both conf files. I let one microserver boot using one conf file and then rename it as grubb, and rename the other conf to grub when I boot thesecond microserver. Any ideas?

-------------------------------------------------------------------
grub.conf

#serial --unit=0 --speed=115200
#terminal serial
default 1
timeout 3
hiddenmenu
fallback 0

title SYNOLOGY_1
root (hd0,0)
kernel /zImage root=/dev/md0 ihd_num=5 netif_num=4 syno_hw_version=DS3612xs
initrd /rd.gz

title SYNOLOGY_2
root (hd0,1)
# cksum /grub_cksum.syno
vender /vender show
# hw_model
kernel /zImage root=/dev/md0 ihd_num=5 netif_num=4 syno_hw_version=DS3612xs
initrd /rd.gz
------------------------------------------------------------
grubb.conf

#serial --unit=0 --speed=115200
#terminal serial
default 1
timeout 3
hiddenmenu
fallback 0

title SYNOLOGY_1
root (hd0,0)
kernel /zImage root=/dev/md0 ihd_num=5 netif_num=4 syno_hw_version=DS3612xs
initrd /rd.gz

title SYNOLOGY_2
root (hd0,1)
# cksum /grub_cksum.syno
# vender /vender show
# hw_model
kernel /zImage root=/dev/md0 ihd_num=5 netif_num=4 syno_hw_version=DS3612xs mac1=00113205

-------------------------------------------------------
 
It's been running fine for the last 3.5 years. The only major change being that we have upgraded to fibre broadband and have a new router. Both microservers have static IP adresses so I can't see that being an issue.
 
I changed the default subnet/dhcp that came with the router to suit my environment.

Though it's probably worth putting the old router back in place to see if it makes any difference.

Edit: Same problem with the old router.
 
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