We have a new environment with an opensolaris snv_67 box and several linux
debian etch systems all connected via 1GbE (e1000 nics) on the same cisco
switch. Unfortunately, ping (and other) requests from the linux systems to the
opensolaris system fails because arp resolution fails on the linux system(s).
This problem is intermittent in that it does not happen from the same nodes
each time after the cache is cleared.
node4:~# ping 10.0.10.21
PING 10.0.10.21 (10.0.10.21) 56(84) bytes of data.
>From 10.0.10.104 icmp_seq=2 Destination Host Unreachable
>From 10.0.10.104 icmp_seq=3 Destination Host Unreachable
>From 10.0.10.104 icmp_seq=4 Destination Host Unreachable
If I initiate a ping from the opensolaris node to the failing linux node,
everything clears up.
What can I do to diagnose the cause of this problem?
On the failing linux system(s):
node4:~# arp -a
nms-internap.alertlogic.net (10.0.10.10) at 00:30:48:89:33:12 [ether] on eth0
monster-solaris-head.alertlogic.net (10.0.10.20) at <incomplete> on eth0
node4:~# uname -a
Linux node4 2.6.18-4-amd64 #1 SMP Fri May 4 00:37:33 UTC 2007 x86_64 GNU/Linux
node4:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:30:48:7A:DD:56
inet addr:10.0.10.104 Bcast:10.0.10.255 Mask:255.255.255.0
inet6 addr: fe80::230:48ff:fe7a:dd56/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
RX packets:2324744 errors:0 dropped:0 overruns:0 frame:0
TX packets:618227 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2375113839 (2.2 GiB) TX bytes:44921182 (42.8 MiB)
Base address:0x2000 Memory:da000000-da020000
node4:~# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.0.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 10.0.10.1 0.0.0.0 UG 0 0 0 eth0
On the opensolaris system:
-bash-3.00# uname -a
SunOS solaris-head 5.11 snv_67 i86pc i386 i86pc
-bash-3.00# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232
index 1
inet 127.0.0.1 netmask ff000000
e1000g0: flags=1201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS,FIXEDMTU> mtu
9000 index 2
inet 10.0.10.20 netmask ffffff00 broadcast 10.0.10.255
ether 0:30:48:79:f2:12
lo0: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu 8252
index 1
inet6 ::1/128
-bash-3.00# netstat -rn
Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ---------- ---------
default 10.0.10.1 UG 1 9
10.0.10.0 10.0.10.20 U 1 30 e1000g0
224.0.0.0 10.0.10.20 U 1 0 e1000g0
127.0.0.1 127.0.0.1 UH 1 13 lo0
--
paul
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