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No LAN traffic since changing interface to a lag

Hi,

After changing an single interface (int 1) for the LAN network to a double interface LAG (int 3+7) on my XG135, the seems to be no routing.

However dhcp is being send out over the LAG but we can’t ping the XG and there is no route to the WAN.

But the strange thing is that the WAN is also changed from an single interface (int 8) to an LAG (int 4+8) and the XG is reachable from the WAN side. So i’m sure the LACP is configured correctly, also since we are getting an ip adres from the dhcp server.

What am i forgetting to change?

Looking forward to solve the issues with you guys!

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0 tragikcomic over 6 years ago

If your trying to connect from a different network then what the interface is actually on, and you don't use a dynamic routing protocol then you will have to update any static routes you have to use the LAG interface now.
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0 Mvz040 over 6 years ago in reply to tragikcomic

Thanks for your reply,

i haven't got any static routes configured, also no dynamic routing protocol.

This is the old setup

And this is the new one.

i'm able to reach 192.168.10.1 without any problems now but when i unplug Port8, than i've got no possibility to reach the XG. So it seems that all traffic still passes through Port 8.

What am i missing here?
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0 LuCar Toni over 6 years ago in reply to Mvz040

Which LACP Mode do you use?

https://community.sophos.com/kb/en-us/123100
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0 Mvz040 over 6 years ago in reply to LuCar Toni

Thanks for your reply!

I'm using an LACP (802.3ad), the same configuration on the switch as for the WAN side. When i virtually unplug each one of my WAN connections, the LACP WAN LAG stays online so that works.

Thanks again!
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0 rfcat_vk over 6 years ago in reply to Mvz040

Hi,

why is your LAG using DHCP, where does it obtain its IP address from?

Ian
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0 Mvz040 over 6 years ago in reply to rfcat_vk

Hi Ian,

The LAG is not using an IP address, because it has all vlan tagged and none untagged.

As for Port 8 which i currently use for bypassing this issue. This interface also is on DHCP and has no issues.
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0 LuCar Toni over 6 years ago in reply to Mvz040

Please consider to use a Dummy IP instead of DHCP on the physical IP.

Nevertheless you should start to tcpdump this.

https://serverfault.com/questions/810649/how-does-one-diagnose-linux-lacp-issues-at-the-kernel-level
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