Gary wrote:
I also noticed something weird. When I try to ping an IP, it returns a
"Destination Host Unreachable" from "127.0.0.1", instead of 9.3.110.132.
Do you mean that you reproduce my problem?
Yes, with the same procedure you described here.
After I had posted the message, I decided to read with wireshark the
network activity. I was surprised to see my ping (that does not work)
with a 0.0.0.0 source address.
Yes, mine too. But after some time, I found that my network traffic
stop going to the correct interface, and tcpdump stopped showing the
packets transmitted by my interface. Here is a snippet of tcpdump output:
06:45:05.081295 IP 0.0.0.0.32778 > 9.3.191.2.domain: 45893+ PTR?
210.191.3.9.in-addr.arpa. (42)
Here are some informations asked by Bernd:
io-burnet:~ # ping 9.3.191.1
PING 9.3.191.1 (9.3.191.1) 56(84) bytes of data.
From 127.0.0.1: icmp_seq=21 Destination Host Unreachable
...
--- 9.3.191.1 ping statistics ---
30 packets transmitted, 0 received, +4 errors, 100% packet loss, time
29096ms, pipe 3
io-burnet:~ # route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
9.3.191.0 0.0.0.0 255.255.255.0 U 0 0 0 eth3
9.3.110.0 0.0.0.0 255.255.255.0 U 0 0 0 eth3
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 9.3.191.1 0.0.0.0 UG 0 0 0 eth3
io-burnet:~ # ip route
9.3.191.0/24 dev eth3 scope link
9.3.110.0/24 dev eth3 proto kernel scope link src 9.3.110.132
127.0.0.0/8 dev lo scope link
default via 9.3.191.1 dev eth3
io-burnet:~ # arp -a
----------- Hang (I pressed ^C)
io-burnet:~ # arp -an
? (9.3.191.2) at 00:09:6B:6E:02:BC [ether] on eth3
? (9.3.191.8) at 00:0D:60:D4:9A:18 [ether] on eth3
? (9.3.191.4) at 00:0D:60:1C:53:18 [ether] on eth3
? (9.3.191.1) at 00:50:50:4D:6C:1C [ether] on eth3
io-burnet:~ # ip neigh
9.3.191.2 dev eth3 lladdr 00:09:6b:6e:02:bc REACHABLE
9.3.191.8 dev eth3 lladdr 00:0d:60:d4:9a:18 STALE
9.3.191.4 dev eth3 lladdr 00:0d:60:1c:53:18 STALE
9.3.191.1 dev eth3 lladdr 00:50:50:4d:6c:1c PROBE
io-burnet:~ # ip route
9.3.191.0/24 dev eth3 scope link
9.3.110.0/24 dev eth3 proto kernel scope link src 9.3.110.132
127.0.0.0/8 dev lo scope link
default via 9.3.191.1 dev eth3
io-burnet:~ # iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
io-burnet:~ # iptables-save
# Generated by iptables-save v1.3.5 on Wed Jan 23 06:54:58 2008
*filter
:INPUT ACCEPT [137:56270]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [371:60573]
COMMIT
# Completed on Wed Jan 23 06:54:58 2008
Linux io-burnet 2.6.16.57-0.5-ppc64 #1 SMP Wed Dec 5 09:02:21 UTC 2007
ppc64 ppc64 ppc64 GNU/Linux
Nothing wrong with the kernel log (dmesg), and netstat -s and ethtool -S
eth3 are attached.
Take care,
--
Breno Leitao <linux@xxxxxxxxxxxxxxxxxx>
io-burnet:~ # ethtool -S eth3
NIC statistics:
rx_packets: 7939
tx_packets: 635
rx_bytes: 790484
tx_bytes: 97084
rx_broadcast: 5520
tx_broadcast: 50
rx_multicast: 1939
tx_multicast: 13
rx_errors: 0
tx_errors: 0
tx_dropped: 0
multicast: 1939
collisions: 0
rx_length_errors: 0
rx_over_errors: 0
rx_crc_errors: 0
rx_frame_errors: 0
rx_no_buffer_count: 0
rx_missed_errors: 0
tx_aborted_errors: 0
tx_carrier_errors: 0
tx_fifo_errors: 0
tx_heartbeat_errors: 0
tx_window_errors: 0
tx_abort_late_coll: 0
tx_deferred_ok: 0
tx_single_coll_ok: 0
tx_multi_coll_ok: 0
tx_timeout_count: 0
tx_restart_queue: 0
rx_long_length_errors: 0
rx_short_length_errors: 0
rx_align_errors: 0
tx_tcp_seg_good: 0
tx_tcp_seg_failed: 0
rx_flow_control_xon: 0
rx_flow_control_xoff: 0
tx_flow_control_xon: 0
tx_flow_control_xoff: 0
rx_long_byte_count: 790484
rx_csum_offload_good: 2147
rx_csum_offload_errors: 0
rx_header_split: 0
alloc_rx_buff_failed: 0
tx_smbus: 0
rx_smbus: 0
dropped_smbus: 0
io-burnet:~ # netstat -s
Ip:
2006 total packets received
203 with invalid addresses
0 forwarded
0 incoming packets discarded
214 incoming packets delivered
483 requests sent out
Icmp:
19 ICMP messages received
0 input ICMP message failed.
ICMP input histogram:
destination unreachable: 13
echo requests: 3
echo replies: 3
120 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 117
echo replies: 3
Tcp:
5 active connections openings
1 passive connection openings
0 failed connection attempts
0 connection resets received
0 connections established
39 segments received
48 segments send out
0 segments retransmited
0 bad segments received.
0 resets sent
Udp:
14 packets received
105 packets to unknown port received.
0 packet receive errors
245 packets sent
TcpExt:
ArpFilter: 0
5 TCP sockets finished time wait in fast timer
1 delayed acks sent
18 packets header predicted
TCPPureAcks: 7
TCPHPAcks: 13
TCPRenoRecovery: 0
TCPSackRecovery: 0
TCPSACKReneging: 0
TCPFACKReorder: 0
TCPSACKReorder: 0
TCPRenoReorder: 0
TCPTSReorder: 0
TCPFullUndo: 0
TCPPartialUndo: 0
TCPDSACKUndo: 0
TCPLossUndo: 0
TCPLoss: 0
TCPLostRetransmit: 0
TCPRenoFailures: 0
TCPSackFailures: 0
TCPLossFailures: 0
TCPFastRetrans: 0
TCPForwardRetrans: 0
TCPSlowStartRetrans: 0
TCPTimeouts: 0
TCPRenoRecoveryFail: 0
TCPSackRecoveryFail: 0
TCPSchedulerFailed: 0
TCPRcvCollapsed: 0
TCPDSACKOldSent: 0
TCPDSACKOfoSent: 0
TCPDSACKRecv: 0
TCPDSACKOfoRecv: 0
TCPAbortOnSyn: 0
TCPAbortOnData: 0
TCPAbortOnClose: 0
TCPAbortOnMemory: 0
TCPAbortOnTimeout: 0
TCPAbortOnLinger: 0
TCPAbortFailed: 0
TCPMemoryPressures: 0
