TCP/IP resets and retransmissions on ER8411
Hello,
Since yesterday we have an unstable internet connectivity. The router is connected to an ISP modem which is in bridge mode. The router WAN port is receiving the WAN IP with DHCP.
We face with intermittent TCP IP connectivity resets. If I directly connect to the ISP device with the laptop there are no TCP resets. If the connectivity is via the router there are random TCP/IP resets, retransmissions based on the wireshark output.
A good example was to try to download firefox installer :-), but it is always dsconnecting.
Any idea what can cause the problem?
I checked different ports on the router , same problem.
Thanks.
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you should upgrade to the latest firmware, the one you have is old and a lot has been fixed in the last year
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ok, yes then it seems strange, I have an ER8411 myself but haven't had the same problem, have you tried changing the network cable?
I use SFP+ WAN1 for internet but have previously used WAN/LAN4 for internet.
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I can see some interesting broadcast messages around the TCP resets/retransmissions. Not sure if this is related.
13:19:49.193496 00:14:78:00:00:ff (oui Unknown) > Broadcast, ethertype Unknown (0x88b5), length 258:
0x0000: 0100 00f0 0100 00ec 0011 2850 0000 0000 ..........(P....
0x0010: 0000 0000 0a35 0180 0a10 7b82 0000 0000 .....5....{.....
0x0020: 0000 0000 0000 0000 0808 0404 0000 0000 ................
0x0030: 0000 0000 0000 0000 d8dd 0000 0000 0035 ...............5
0x0040: 0000 0000 e4fa c490 4ad9 78af 08bf 4e74 ........J.x...Nt
0x0050: 1100 0000 0100 0000 0808 0404 0000 0000 ................
0x0060: 0000 0000 0000 0000 54e0 31fc 0000 0000 ........T.1.....
0x0070: 0000 0000 0000 0000 0035 0000 0000 d8dd .........5......
0x0080: 0000 0000 e4fa c490 4add 541f 8d09 21bd ........J.T...!.
0x0090: 1700 0000 0100 0000 0000 4052 0000 0000 ..........@R....
0x00a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x00e0: 0010 0100 1100 0000 1700 0000 0000 0000 ................
0x00f0: 0000 0000 ....
The MAC address looks a TP-LINK one but not of my devices. I can see this even if everything is disconnected from the router.
It is a kind of continous message with different content/length, but from the same MAC to broadcast MAC
14:01:39.353345 00:14:78:00:00:aa > ff:ff:ff:ff:ff:ff, ethertype Unknown (0x88b5), length 60:
0x0000: 0100 0008 0700 0004 9703 0000 0000 0000 ................
0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
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That doesn't tell me anything, but are you using a controller or is it stand alone? Either way, you can try a factory reset of the router, if it is stand alone, you can take a backup first if you have an advanced configuration and restore after reset to default.
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OK , I did factory reset. Then test without any specific settings. Same problem.
restored config , same problem.
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I don't really know what it could be, is it possible to remove the ISP modem and connect the router directly to the internet? I have done that so I get internet directly on the ER8411
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