On Thu, 2008-12-18 at 10:43 -0800, Larry Riedel wrote:
> Are those tcpdumps all from the host, or some from
> the guest? 

Its from the host.

>  It seems clear that ARP replies are not
> coming from the guests, but maybe they are not
> receiving them.  Is it possible that some other network
> interface on the host or guest is using 192.168.1.x, or

No. I have double/triple checked the possibility of a duplicate
interface.

> that some iptables rule is filtering the messages?

Not on the host..

r...@jd-laptop:~# sudo /sbin/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         
r...@jd-laptop:~# 


And the guests are bare installs.


>   It
> looks from the ifconfig like the guest kernel should be
> responding to arp requests if it sees them.
> 

Here is a full tcpdump just listening on the guest interface (in the
guest) while I try to apt-get:

j...@hardy:~$ sudo tcpdump -i eth0|grep 192.168.1.200
tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
03:23:18.364817 IP 192.168.1.200.ssh > 192.168.1.6.34976: P
1077782894:1077783006(112) ack 133016689 win 528 <nop,nop,timestamp
603691 20794158>
03:23:18.366587 IP 192.168.1.6.34976 > 192.168.1.200.ssh: . ack 112 win
501 <nop,nop,timestamp 20794192 603691>
03:23:18.369995 IP 192.168.1.6.34976 > 192.168.1.200.ssh: . ack 112 win
501 <nop,nop,timestamp 20794192 603691>
03:23:18.371727 IP 192.168.1.200.ssh > 192.168.1.6.34976: P 112:224(112)
ack 1 win 528 <nop,nop,timestamp 603691 20794192>
03:23:18.372476 IP 192.168.1.6.34976 > 192.168.1.200.ssh: . ack 224 win
501 <nop,nop,timestamp 20794194 603691>
03:23:18.373751 IP 192.168.1.6.34976 > 192.168.1.200.ssh: . ack 224 win
501 <nop,nop,timestamp 20794194 603691>
03:23:18.376991 IP 192.168.1.200.39359 > vnsc-bak.sys.gtei.net.domain:
52397+ PTR? 6.1.168.192.in-addr.arpa. (42)
03:23:18.377827 IP 192.168.1.200.39359 > vnsc-bak.sys.gtei.net.domain:
52397+ PTR? 6.1.168.192.in-addr.arpa. (42)
03:23:18.558495 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.558495 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.560048 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.560052 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.560056 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.560058 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566105 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566108 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566110 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566254 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566257 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566260 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566262 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566265 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566267 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566269 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)
03:23:18.566271 IP vnsc-bak.sys.gtei.net.domain > 192.168.1.200.39359:
52397 NXDomain 0/1/0 (119)



> 
> Larry
> 
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