arp: Failed. Host is not on a directly attached subnet.

[S_AJAY1988]

Hi,

We are getting the below error message on our SAN controller repeatedly. What may be the root cause for this error and how to rectify the same?

Error message for your reference: arp: Failed. Host is not on a directly attached subnet.

[GTNDADABO]

SAYJAY,

If you run storage show acp are any of your modules inactive?  i.e.:

1c.06.B           000          255.255.255.2     01.20        IOM3         inactive (initializing)

[pedro_rocha]

Hi,

I had this issue and it was caused by bad ACP cabling and configuration. After reviewing cabling, I reconfigured ACP and it is all good (modules status were suppressed by me):

Alternate Control Path:  Enabled

Ethernet Interface:      e0P

ACP Status:              Active

ACP IP Address:          192.168.1.153

ACP Domain:              192.168.1.0

ACP Netmask:             255.255.255.0

ACP Connectivity Status: Full Connectivity

Alternate Control Path:  Enabled

Ethernet Interface:      e0P

ACP Status:              Active

ACP IP Address:          192.168.1.26

ACP Domain:              192.168.1.0

ACP Netmask:             255.255.255.0

ACP Connectivity Status: Full Connectivity

Regards,

Pedro Rocha.

[VKALVEMULA]

Hi Pedro

did you unplug and plug the ACP cable back ?

i see as

Alternate Control Path:  Enabled

Ethernet Interface:      e0P

ACP Status:              Active

ACP IP Address:          192.168.0.114

ACP Subnet:              192.168.0.0

ACP Netmask:             255.255.255.0

ACP Connectivity Status: Partial Connectivity

3d.10.A           000          192.168.2.18    02.04        IOM6         inactive (initializing)

3d.10.B           000          192.168.3.218   02.04        IOM6         inactive (initializing)

my 3d loop got struck in inactive state.

i did unplug and plug the ACP cables and rebooted . but no use.

can you please let me know how did you resolve this issue.

thanks

vijay

[pedro_rocha]

Hello Vijay,

My issue was caused by bad cabling. Have you checked if yours is all good? ACP cabling is sometimes confusing when dealing with several disk shelf stacks.

After correcting the cables I run through the acp configuration wizard and everything was ok.

Kind regards,

Pedro.

[patpac1]

Hi I'm having exactly the same error as discribed by Vijay as you can see in the file attached. Also I'm attaching a drawing of my actual ACP cabling. I also replaced the whole set of Ethernet cables CAT 6 with brand new ones. Thank you in advanced