Hi,
For days now I am trying to find the cause for packet loss on my own lan to any other IP on the lan, also the router/gateway IP. I am running debian 12 os on a poweredge r420 server. I run mtr 192.168.178.1 and ghet a 15% packet loss which can also be noticed in the games which are served by the server to the internet. I have no idea what top trouble shoot next. There is a xen-bridge on the nic.
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my /etc/network/interfaces is this:
auto eno1
iface eno1 inet dhcp (no cable is connected to eno1)
iface eno2 inet manual
auto xenbr0
iface xenbr0 inet dhcp
-----------------------
ip link shows
ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether f0:1f:af:e8:bc:7b brd ff:ff:ff:ff:ff:ff
altname enp2s0f0
3: eno2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master xenbr0 state UP group default qlen 1000
link/ether f0:1f:af:e8:bc:7c brd ff:ff:ff:ff:ff:ff
altname enp2s0f1
4: xenbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 62:59:16:4a:b5:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.178.80/24 brd 192.168.178.255 scope global dynamic xenbr0
valid_lft 519321sec preferred_lft 519321sec
5: vif1.0-emu: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master xenbr0 state UNKNOWN group default qlen 1000
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
6: vif1.0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master xenbr0 state DOWN group default qlen 1000
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
10: vif3.0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master xenbr0 state UP group default qlen 1000
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
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ip route shows
default via 192.168.178.1 dev xenbr0
192.168.178.0/24 dev xenbr0 proto kernel scope link src 192.168.178.80
------------------------------------------------
lsof -i shows
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
avahi-dae 886 avahi 12u IPv4 33868 0t0 UDP *:mdns
avahi-dae 886 avahi 13u IPv6 33869 0t0 UDP *:mdns
avahi-dae 886 avahi 14u IPv4 33870 0t0 UDP *:37540
avahi-dae 886 avahi 15u IPv6 33871 0t0 UDP *:50366
dhclient 987 root 7u IPv4 25652 0t0 UDP *:bootpc
dhclient 1184 root 7u IPv4 24719 0t0 UDP *:bootpc
glances 1234 root 4u IPv4 12433 0t0 TCP localhost:61209 (LISTEN)
sshd 1272 root 3u IPv4 34897 0t0 TCP *:ssh (LISTEN)
sshd 1272 root 4u IPv6 34899 0t0 TCP *:ssh (LISTEN)
apache2 1303 root 3u IPv4 41041 0t0 TCP *:http (LISTEN)
master 1718 root 13u IPv4 12475 0t0 TCP *:smtp (LISTEN)
master 1718 root 14u IPv6 12476 0t0 TCP *:smtp (LISTEN)
xen-qemu- 2052 root 11u IPv4 37129 0t0 TCP localhost:5900 (LISTEN)
apache2 4842 www-data 3u IPv4 41041 0t0 TCP *:http (LISTEN)
apache2 4844 www-data 3u IPv4 41041 0t0 TCP *:http (LISTEN)
apache2 4845 www-data 3u IPv4 41041 0t0 TCP *:http (LISTEN)
cupsd 4901 root 7u IPv4 82038 0t0 TCP localhost:ipp (LISTEN)
sshd 10134 root 4u IPv4 97733 0t0 TCP DsrvSKYNET:ssh->98-155-210-87.ftth.glasoperator.nl:35868 (ESTABLISHED)
sshd 10165 sunyata 4u IPv4 97733 0t0 TCP DsrvSKYNET:ssh->98-155-210-87.ftth.glasoperator.nl:35868 (ESTABLISHED)
WSServer- 13149 soulmask 15u IPv4 143397 0t0 TCP localhost:44989 (LISTEN)
WSServer- 13149 soulmask 19u IPv4 143399 0t0 UDP *:27017
WSServer- 13149 soulmask 23u IPv4 140915 0t0 TCP localhost:18888 (LISTEN)
WSServer- 13149 soulmask 35u IPv4 122628 0t0 UDP *:7784
WSServer- 13149 soulmask 37u IPv4 140916 0t0 TCP *:27020 (LISTEN)
WSServer- 13149 soulmask 45u IPv4 143412 0t0 TCP DsrvSKYNET:37253->185.25.182.52:27037 (ESTABLISHED)
xen-qemu- 13906 root 11u IPv4 149739 0t0 TCP localhost:5901 (LISTEN)
sshd 15664 root 4u IPv4 163974 0t0 TCP DsrvSKYNET:ssh->98-155-210-87.ftth.glasoperator.nl:52162 (ESTABLISHED)
sshd 15672 sunyata 4u IPv4 163974 0t0 TCP DsrvSKYNET:ssh->98-155-210-87.ftth.glasoperator.nl:52162 (ESTABLISHED)
--------------------------------------------------------------
netstat -s shows
Ip:
Forwarding: 2
1261245 total packets received
9 with invalid headers
4 with invalid addresses
0 forwarded
0 incoming packets discarded
1248166 incoming packets delivered
837064 requests sent out
240 dropped because of missing route
Icmp:
8288 ICMP messages received
6 input ICMP message failed
ICMP input histogram:
destination unreachable: 315
timeout in transit: 519
echo requests: 47
echo replies: 7407
9757 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 297
echo requests: 9413
echo replies: 47
IcmpMsg:
InType0: 7407
InType3: 315
InType8: 47
InType11: 519
OutType0: 47
OutType3: 297
OutType8: 9413
Tcp:
2515 active connection openings
44 passive connection openings
1175 failed connection attempts
3 connection resets received
3 connections established
947497 segments received
658901 segments sent out
2599 segments retransmitted
1 bad segments received
1847 resets sent
Udp:
211857 packets received
8 packets to unknown port received
0 packet receive errors
169041 packets sent
0 receive buffer errors
0 send buffer errors
IgnoredMulti: 79823
UdpLite:
TcpExt:
992 TCP sockets finished time wait in fast timer
7 packets rejected in established connections because of timestamp
2037 delayed acks sent
1 delayed acks further delayed because of locked socket
Quick ack mode was activated 42 times
39832 packet headers predicted
16467 acknowledgments not containing data payload received
40030 predicted acknowledgments
TCPSackRecovery: 144
TCPDSACKUndo: 77
56 congestion windows recovered without slow start after partial ack
TCPLostRetransmit: 24
TCPSackFailures: 2
300 fast retransmits
377 retransmits in slow start
TCPTimeouts: 398
TCPLossProbes: 1683
TCPLossProbeRecovery: 614
TCPSackRecoveryFail: 3
TCPBacklogCoalesce: 2861
TCPDSACKOldSent: 179
TCPDSACKOfoSent: 49
TCPDSACKRecv: 654
301 connections reset due to unexpected data
2 connections reset due to early user close
1 connections aborted due to timeout
TCPDSACKIgnoredNoUndo: 358
TCPSackShifted: 91
TCPSackMerged: 123
TCPSackShiftFallback: 536
TCPRcvCoalesce: 538691
TCPOFOQueue: 6110
TCPOFOMerge: 49
TCPChallengeACK: 2
TCPSYNChallenge: 1
TCPSpuriousRtxHostQueues: 3
TCPAutoCorking: 16873
TCPFromZeroWindowAdv: 3
TCPToZeroWindowAdv: 3
TCPSynRetrans: 18
TCPOrigDataSent: 75702
TCPHystartTrainDetect: 2
TCPHystartTrainCwnd: 46
TCPHystartDelayDetect: 2
TCPHystartDelayCwnd: 87
TCPACKSkippedPAWS: 3
TCPKeepAlive: 2
TCPDelivered: 77072
TCPAckCompressed: 4842
TcpTimeoutRehash: 397
TCPDSACKRecvSegs: 654
IpExt:
InMcastPkts: 1260
OutMcastPkts: 814
InBcastPkts: 79829
InOctets: 4851330675
OutOctets: 114849976
InMcastOctets: 97650
OutMcastOctets: 43656
InBcastOctets: 22505209
InCsumErrors: 9
InNoECTPkts: 3794573
InECT0Pkts: 1
im out of idea's to investigate, please help ?
