Is this method interfering with my relationship? or some other problem?
I am assuming you are using PPPoE over DSL. I would answer most of the corruption cases that need to be detected at a given ATM layer (each AAL frame has one 32-bit CRC field, and each ATM cell has an 8-bit CRC). I’m not sure which Error detection or correction features are included in all DSL protocols.
However, a file corruption error can very well occur even before it reaches the circuit ATM. Or then your entire local network alone.
I think the question is, “how much is in the package?” If that could mean 300 errors on 300 million packets, this is probably not a problem. Obviously, if it’s 299 x 300, that’s the situation.
Other than that, I really had no idea what the “normal” error rate was. I will probably have to go a long way from TCP checksum offloading to actually determine this.
I would first search for the device using the pppoe daemon. Shouldn’t the ATM layer be error-handling? Therefore, if you see any errors above, it is very likely that a software / firmware / hardware incompatibility error has occurred somewhere. If it is definitely an IT gateway, I would try to run memtest on it, or try another policy solution and see if the same underlying problem occurs .
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I would like to watch this issue for a while, since we are seeing a similar problem at work (about 200 such errors per day), unfortunately I do not see it at home.
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According to this post: http: //plasma-gate.weizmann.a c.il/Linux/maillists/03/09/msg00067.html , the problem occurs because of the conflicting CLAMPMS setting between iptables or pppoe configuration.
Home if CLAMPMSS has disabled pppoe configuration and configured iptables. At work, the configuration is the same (set in pppoe, but disabled next to iptables).
When to drop a packet in TCP accept queue?
When the kernel receives a SYN from a client and the TCP receive queue is full, the kernel discards the SYN and adds 1 to TcpExtListenOverflows. At the same time, the kernel will also add 1 to the TcpExtListenDrops. When TCP socket is in LISTEN state but kernel needs to drop packet]
At some point, I might try changing the results in the setup screen and see if that helps.
I have a brand new DSL modem connected directly to my current Linux machine, so I’m pretty sure I shouldn’t have any conflicts as described in the paired post -ppp0 to learn how.
How do I know if I really need to install CLAMMSS =?
If the mtu of the ppi interface has a value of 1492 and / or lower and all hosts on the network are the same (or 1500 more), you will almost certainly need itbeats.
If you are using pppoe in kernel mode, the clamp option may need to be redundant, and you will need to use iptables to do this successfully. I don’t know why not use a kernel mode plugin that has been using a stable kernel for years and may very well have better performance.
CLAMPMSS = no
Why do I need this type of plugin? seems to work well, not enough? Does it have any features that seem to be worth it?
Why do I need this WordPress tool? Does it seem to work well unnecessarily?
Is there a client for PPPoE in Linux?
pppoe is another user-space point-to-point protocol (PPPoE, roughly Ethernet) client for Linux and other modern UNIX developments. pppoe works with any pppd PPP daemon to provide PPP over Ethernet communications as used by many ADSL service providers.
You don’t need it, but you have to look at things, whoever has it, it’s a little harsh.
I did some web surfing this weekend experimenting with my little DSL connection. I learned a thing or two about the tough challenges, so I figured the short blog post was in the hopes that someone else might buy time.
My internet connection has been a little slow lately. From time to timeand I noticed packet loss but didn’t take the time to figure out exactly where. The tests I ran this weekend were very sensitive to packet loss, so I had to look around.
There were such symptoms. The first was several starters like the following.
Apr 14, 12:03:21 pppoe Titan [26690]: Invalid TCP checksum 109cApr 19 12:10:35 PM Titan pppd [26689]: protocol denied for protocol requiring 0x0 supportApr 19 12:10:35 pm titan pppd [26689]: protocol rejected because protocol does not support 0x0Apr 19, 12:10:36 pm titan pppd [26689]: protocol rejection for unsupported protocol 0x0Apr 19 12:10:36 PM titan pppd [26689]: protocol rejected for 0x0 protocol requiring supportApr 19, 12:24:50 PM Titan pppoe [26690]: Invalid TCP 3821 checksumApr 19 12:31:54 PM pppoe Titan [26690]: Invalid TCP 9aeb checksumApr 19 12:33:22 pm titan pppd [26689]: protocol rejection for unsupported protocol 0x0Apr 19 12:33:49 pm titan pppd [26689]: protocol rejection for unsupported protocol 0xb00Apr 19 12:33:57 Titan pppd [26689]: protocol rejected for protocol requiring support 0x2fe5Apr 19 12:33:58 titan pppd [26689]: protocol rejected due to unsupportedThe settable protocol 0x0Apr 19, 12:34:01 pm titan pppd [26689]: protocol rejection for unsupported protocol 0x0Apr 14, 12:34:02 pm titan pppd [26689]: protocol rejected for protocol requiring 0x0 supportApr 19 12:34:12 pm titan pppd [26689]: protocol failure for unsupported process 0x58e6Apr 19 12:34:14 pm titan pppd [26689]: protocol rejection for unsupported protocol 0x0Apr 19 12:34:17 pm titan pppd [26689]: protocol rejection for unsupported protocol 0x0Apr 19 12:34:27 PM Titan pppd [26689]: protocol failure for a protocol that requires 0x0 support.Apr 19 12:34:29 pm titan pppd [26689]: protocol rejected due to unsupported protocol 0x0Apr 19, 12:34:30 pm titan pppd [26689]: protocol rejection for unsupported protocol 0xb00Apr 19 12:34:31 PM Titan pppd [26689]: protocol rejected for protocol requiring 0x800 supportApr 19 12:34:33 pm titan pppd [26689]: protocol rejected due to unsupported process 0x0Apr 19 12:34:36 pm titan pppd [26689]: protocol rejected for unsupported protocol 0x7768
Invalid TCP checksum entries indicate some kind of container corruption. However, I had no idea that in this case it was due to the sendingIncluded packages that may have been received. Since I don’t know how PPP works inherently as well as I would have liked, protocol rejection messages were harder to handle. I did a full root hijack of the ppp0 Ethernet interface to see PPP messages in Wireshark.
Suspicious PPP PPPoE message
My client sent a message with the protocol field set to 0. Wireshark doesn’t know what 0 should mean.
PPP Sex Refusal Message
And the remote PPPoE device sends a bounce-back message
