Duplicate address msg

[Pericynthion]

Me again - just poking around in the logs and I keep seeing these for both the wireless interfaces (eth1 and eth2);

Apr 3 21:34:40 kernel: eth2: received packet with own address as source address

STP is enabled, but I've no idea whats generating any packets with the same MAC (unless of course this is just an artifact of the switch BR0 config?)


eth1 Link encap:Ethernet HWaddr 60:A4:4C:69C:68
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:551651 errors:0 dropped:0 overruns:0 frame:113555
TX packets:360545 errors:8 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:675977570 (644.6 MiB) TX bytes:78702502 (75.0 MiB)
Interrupt:3 Base address:0x8000

eth2 Link encap:Ethernet HWaddr 60:A4:4C:69C:6C
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:12982820 errors:0 dropped:0 overruns:0 frame:20886
TX packets:2120867 errors:45 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1805487248 (1.6 GiB) TX bytes:878853768 (838.1 MiB)
Interrupt:5 Base address:0x8000


Thanks in advance for any pointers..

 

[RMerlin]

I would check to ensure you don't have a device that is connected both with Ethernet and wireless at the same time.

 

[ScottW]

Apr 3 21:34:40 kernel: eth2: received packet with own address as source address

I see this message pretty frequently.

I have a N66U at one end of the house in router mode, providing routing and wireless access. I have a second N66U at the other end of the house in AP mode, providing wireless access at that end of the house. (The AP N66U is wired from the router N66U, via a gigabit switch. Both router and AP use the same SSID's on different channels).

For me, the message seems to get logged when portable devices (iphones, ipads, laptops) move from one end of the house to the other -- and thus disconnect from one wireless and connect to the other. I have chalked it up to some confusion in the switch when a device's MAC that was actively talking on one interface suddenly shows up on another interface, but that is just speculation on my part.

If that is the case, I suppose it could also occur when a device moves between the 2.4G and 5G interfaces on the same device?

 

[varakiro]

I have the same messages on AC68R and my setup and network is as simple as it can get, Motorola SB6141 cable modem to ac68r which I use in wireless router mode and is the ONLY router at home.
However I carried the same name for ssid from my old wrt54gs, is that why maybe?




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[cyborgpunte]

Kinda same setup as @ScottW

Disconnected my old LAN-port-wired router from power outlet.
This router acting as an AP/switch in the other end of thehouse.

Still receiving these messages on my main router rt-ac68u.

rt-ac68u same SSID's on both 2.4G and 5G.

So I have to dig deeper

BR

 

[jlake]

Kinda same setup as @ScottW

Disconnected my old LAN-port-wired router from power outlet.
This router acting as an AP/switch in the other end of thehouse.

Still receiving these messages on my main router rt-ac68u.

rt-ac68u same SSID's on both 2.4G and 5G.

So I have to dig deeper

BR

It's not acting as an AP/switch. It's acting as an AP/bridge. If it was just a dumb switch, you wouldn't get those errors in log. I'm pretty sure the errors are harmless. But I can't say for sure. I'm not bridge savvy enough to even attempt to articulate exactly what's happening. Asus would probably be the best source for an explanation. It you want the errors to go away, then use unique SSIDs.

An Asus in AP mode is the exact same thing as a Linksys in Bridge Mode.
Read the instructions for linksys bridge mode. At the bottom "Quick Tips", it talks about SSID.

http://kb.linksys.com/Linksys/GetAr...tting_up_the_Linksys_E4200_in_bridge_mode.xml

 

[cyborgpunte]

OK,
So your opinion is that my hardwired devices to "router2" is bridged.

I thought my LANports was switched not repeated as in a dumb HUB.
and with the hardwired connection between routers connected to LANport on router2.

http://en.wikipedia.org/wiki/OSI_model

and with those messages percisting after powerdownded router2 as I wrote

you recomandation is 2 different SSID names on my 2 band on rt-ac66u ???

It's not acting as an AP/switch. It's acting as an AP/bridge. If it was just a dumb switch, you wouldn't get those errors in log. I'm pretty sure the errors are harmless. But I can't say for sure. I'm not bridge savvy enough to even attempt to articulate exactly what's happening. Asus would probably be the best source for an explanation. It you want the errors to go away, then use unique SSIDs.

An Asus in AP mode is the exact same thing as a Linksys in Bridge Mode.
Read the instructions for linksys bridge mode. At the bottom "Quick Tips", it talks about SSID.

http://kb.linksys.com/Linksys/GetAr...tting_up_the_Linksys_E4200_in_bridge_mode.xml

 

[jlake]

OK,
So your opinion is that my hardwired devices to "router2" is bridged.

I thought my LANports was switched not repeated as in a dumb HUB.
and with the hardwired connection between routers connected to LANport on router2.

http://en.wikipedia.org/wiki/OSI_model

and with those messages percisting after powerdownded router2 as I wrote

you recomandation is 2 different SSID names on my 2 band on rt-ac66u ???

Yes, 4 different SSIDs. Or 4 unique SSIDs. Whichever word works for you.

http://en.wiktionary.org/wiki/unique

 

[jlake]

Bridge, Bridged, Bridges, Bridging all have different meanings depending on who you talk to. You're probably going to have to talk to a network engineer. I'm not a network engineer.

The main advantage of Linksys' bridge mode and Asus' AP mode over the old school LAN to LAN cascade, is you can now forward a port to a client connected to the AP. There's other little advantages like correct time on AP..and probably more that I'm not aware of.

The main disadvantage is not being able to use same SSIDs like in a traditional LAN to LAN cascade or LAN to WAN cascade without getting conflicts like you see in your log. Probably harmless conflicts because they happen so quick, but I just don't know. I suppose if you had a bunch of ports forwarded to a roaming mobile device/laptop, the conflicts could be not so harmless.

 

[cyborgpunte]

You refer a load to Asus
why not ask them about the checkbox
that copy settings from 2.4GHz to 5GHz settings including SSID.

BR
TIA

Bridge, Bridged, Bridges, Bridging all have different meanings depending on who you talk to. You're probably going to have to talk to a network engineer. I'm not a network engineer.

The main advantage of Linksys' bridge mode and Asus' AP mode over the old school LAN to LAN cascade, is you can now forward a port to a client connected to the AP. There's other little advantages like correct time on AP..and probably more that I'm not aware of.

The main disadvantage is not being able to use same SSIDs like in a traditional LAN to LAN cascade or LAN to WAN cascade without getting conflicts like you see in your log. Probably harmless conflicts because they happen so quick, but I just don't know. I suppose if you had a bunch of ports forwarded to a roaming mobile device/laptop, the conflicts could be not so harmless.

 

[varakiro]

I paid attention to the logs and in my case this message appears when my laptop wakes up from standby or when the browser quits on a website that does not work.




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[kfp]

If that is the case, I suppose it could also occur when a device moves between the 2.4G and 5G interfaces on the same device?

That looks like what is happening. The messages appear whenever a device is resumed from a suspended state, the device will hop from one band to the other frequency (2.4 to 5 or vice versa).

Not only does this fill up the logs, but it actually delays some push notifications on mobile devices. Anyone is having similar issues?