Description of problem: During load on ppp interface (using PPPoE), various Protocol-Rejects are seen in log. Version-Release number of selected component (if applicable): ppp-2.4.4-2 rp-pppoe-3.8-1.fc7 How reproducible: On more or less high ppp load every 10 to 30 seconds, sometimes more often Actual results: ppp0 Link encap:Point-to-Point Protocol inet addr:**** P-t-P:***** Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:435216 errors:438196 dropped:0 overruns:0 frame:0 TX packets:346143 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:489546292 (466.8 MiB) TX bytes:120732542 (115.1 MiB) Example from log: Feb 16 18:04:10 * pppd[*]: Protocol-Reject for unsupported protocol 0xb8db Feb 16 18:04:26 * pppd[*]: Protocol-Reject for unsupported protocol 0x9a9a Feb 16 18:04:41 * pppd[*]: Protocol-Reject for unsupported protocol 0xaf Feb 16 18:04:42 * pppd[*]: Protocol-Reject for unsupported protocol 0xa0cd Feb 16 18:05:08 * pppd[*]: Protocol-Reject for unsupported protocol 0xe7 Feb 16 18:05:11 * pppd[*]: Protocol-Reject for unsupported protocol 0xb22e Expected results: No such errors. Additional info: I'm more or less stumped, what's going on. I've captured some packets on the Ethernet inteface and found, that the packets (where also tcpdump claims about unknown ppp protocol) did not contain IP payload. The related ethernet interface (8139too module) do not show any link error, so it looks like that at least layer 2 from NIC to DSL modem is ok. Are there any hints available what can causing this problem? I found only rare results on Google.
Looks like this is not a bug. Please search /usr/share/doc/ppp-2.4.4/FAQ for "Protocol-Reject". Closing as NOTABUG.
Thank you for your comment, just for information, after switching the pppoe daemon back to asynchronos, such messages no longer appear, also, the error counter of the ppp interface stays 0 now. /etc/sysconfig/network-scripts/ifcfg-ppp0: .. #SYNCHRONOUS=yes SYNCHRONOUS=no ...