Well, your vlan interface on this system looks non-standard: "vlan1292@enc1000"
I assume you configured that yourself after the installation?
It's supposed to look like this: "enc1000@1292" - like on the other installation.
Nevertheless, it might work - and looks like it works in your case.
But that let's me assume that there is an issue in the network environment itself, maybe in the switch configuation and/or routing for vlan 1300.
And I do not see/find any indication of a qeth recovery in the logs, which is good.
So something is definitely different - and actually better.
Well, your vlan interface on this system looks non-standard: "vlan1292@enc1000"
I assume you configured that yourself after the installation?
It's supposed to look like this: "enc1000@1292" - like on the other installation.
Nevertheless, it might work - and looks like it works in your case.
But that let's me assume that there is an issue in the network environment itself, maybe in the switch configuation and/or routing for vlan 1300.
And I do not see/find any indication of a qeth recovery in the logs, which is good.
So something is definitely different - and actually better.