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18.1 Legacy Series / Strange Networkproblems
« on: February 05, 2018, 08:28:41 pm »
Here is my setup:
1 Port -> WAN (configured with DHCP)
2 Ports -> bridge0(LAN)
2 Ports -> bridge1(WIFI)
Wifi-Ports:
- igb8 connected to a NAS
- igb9 connected to an access-point
All devices in Wifi are configured with DHCP and have static arp entries.
Sometimes, Ports "die" on the WIFI-Interface. This means, the device connected on this NIC-port is not available. The NIC-Port is marked as UP on both sides but if i do a tcpdump on the firewall and on the device-connected on this port, and try to make an arp-scan from the firewall to the device, then i can see arp-packets goint to my device, on the device I see that it replies correctly. But I can't see any replies on the tcpdump of the firewall.
That is strange, because the device is connected via ethernet-cable(Yes i also tried another cable too). And the problem is fixed as soon as i disable the WIFI-Interface and enable it again. The problem doesn't always occur. Somedays it doesn't occur at all, sometimes it happens many times.
If a device "died" i tried out some things:
- disconnect the device from the firewall, and directly connect it to another device. no problems.
- disconnect the diveice from the firewall and connect another device on the same port. same problems
I have no idea how to fix this or even how to find out the source of this strange behaviour.
1 Port -> WAN (configured with DHCP)
2 Ports -> bridge0(LAN)
2 Ports -> bridge1(WIFI)
Wifi-Ports:
- igb8 connected to a NAS
- igb9 connected to an access-point
All devices in Wifi are configured with DHCP and have static arp entries.
Sometimes, Ports "die" on the WIFI-Interface. This means, the device connected on this NIC-port is not available. The NIC-Port is marked as UP on both sides but if i do a tcpdump on the firewall and on the device-connected on this port, and try to make an arp-scan from the firewall to the device, then i can see arp-packets goint to my device, on the device I see that it replies correctly. But I can't see any replies on the tcpdump of the firewall.
That is strange, because the device is connected via ethernet-cable(Yes i also tried another cable too). And the problem is fixed as soon as i disable the WIFI-Interface and enable it again. The problem doesn't always occur. Somedays it doesn't occur at all, sometimes it happens many times.
If a device "died" i tried out some things:
- disconnect the device from the firewall, and directly connect it to another device. no problems.
- disconnect the diveice from the firewall and connect another device on the same port. same problems
I have no idea how to fix this or even how to find out the source of this strange behaviour.