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Active/Standby, failover unable to contact firewall

Hi,

I have a pair og SG650 in Active/Standby, the Master works perfectly, but if I initiate a failover to the slave, either via a takeover from CLI or a reboot of the primary etc. I am unable to contact the new primary (previous slave) via Eth1.

Both devices are connected to from Eth1 into a single switch which has the most basic config on those corresponding interfaces. They're both in the same vlan.

I've updated the devices to the latest fitmware, but didn't expect that to resolve the issue.

It's as if the slave never picks up the primary's IP address.

I'm pretty new to the Sophos lineup, but know CISCO ASA failover config really well, I figured it's be similar whereby the secondary/slave unit takes over the primary address, but in this instance this doesn't seem to be occuring.

Any ideas as to what the cause could be? I've ruled out faulty NIC's on the switch.

Cheers

Rich

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0 PhilippRusch over 3 years ago

Hello Rich,

you didn't put the "HA" interface(s) into a switch, did you?

This has to be a direct cabling, nothing between the both SG-devices.

Do you have a message "unlinked" in the display?

Mit freundlichem Gruß, best regards from Germany,

Philipp Rusch

New Vision GmbH, Germany
Sophos Silver-Partner

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0 Richard Priest1 over 3 years ago in reply to PhilippRusch

No the HA interface is a direct connection between Master and Slave. when checking the status they show as Active and Ready
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0 PhilippRusch over 3 years ago in reply to Richard Priest1

Hello Rich,

stills sounds like an ARP cache problem, like Emmanuel already suspects.

You write about a virtual MAC, you don't mean you configured one at the switches?

Mit freundlichem Gruß, best regards from Germany,

Philipp Rusch

New Vision GmbH, Germany
Sophos Silver-Partner

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0 Richard Priest1 over 3 years ago in reply to PhilippRusch

Within the UTM config you can set a virtual MAC address for each individual interface, rather than using the BIA of the physical interface.

via the webgui, Interfaces>Hardware>edit

Cheers
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0 PhilippRusch over 3 years ago in reply to Richard Priest1

Yes, I know that, I was just stumbling over your wording.

What, if you'd remove that virtual MAC for a test cycle?

Mit freundlichem Gruß, best regards from Germany,

Philipp Rusch

New Vision GmbH, Germany
Sophos Silver-Partner

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0 Richard Priest1 over 3 years ago in reply to PhilippRusch

apologies, wasn't trying to teach you to suck eggs

I'll try removing the virtual MAC and get back to you

Cheers
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0 dirkkotte over 3 years ago in reply to Richard Priest1

If you lost the connection after failover ... what happens if the ports on the switch are swapped? (or simply short pulled)
I saw quite a lot there: defective ports / cables, switch features, misconfiguration, etc.
I would switch off the slave for this time.

Dirk

Systema Gesellschaft für angewandte Datentechnik mbH // Sophos Platinum Partner
Sophos Solution Partner since 2003
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0 dirkkotte over 3 years ago in reply to Richard Priest1

If you lost the connection after failover ... what happens if the ports on the switch are swapped? (or simply short pulled)
I saw quite a lot there: defective ports / cables, switch features, misconfiguration, etc.
I would switch off the slave for this time.

Dirk

Systema Gesellschaft für angewandte Datentechnik mbH // Sophos Platinum Partner
Sophos Solution Partner since 2003
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