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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Thanks for your feedback. As stated earlier I replaced the ER8411 with an old 1043ND and seems all issues went away.
There is nothing much in the environment as I disconnected everything. Except the laptop I'm using for testing , two cables (which I replaced two times already) , ER8411 and the modem.
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Is it normal behaviour that the ER8411 is sending broadcast messages continously like this?
Source MAC is 00:14:78:00:00:ff / 00:14:78:00:00:aa but there is no such device connected to the router (just one laptop). This MAC seems belongs to TP-LINK (vendor) but it is NOT the MAC of the router.
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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