Re: [Xen-users] no network traffic between domUs

["Gabriel Gunderson" <ggundy@xxxxxxxxx>]

On 8/3/06, Justin R Findlay <justin@xxxxxxxxxxx> wrote:

UPDATE: Just before sending this email I noticed that traffic between
the two domUs starts flowing as expected only after I ping the client
from the server, however I'm still mystified as to what is really going
on.

I'm working with Justin on this and wanted to add a few details.  As he said, if you try to ping the client DomU from the gateway/firewall/router server DomU, then (after 5 or 6 seconds) the traffic will start flowing.  Only *after* doing this can the client DomU then ping the gateway (or beyond).  I'm 99.9% sure that the networking is setup correctly and *should* be working.

I believe it's a Xen or NIC kernel module problem.  We are testing a setup like it and it *seems* to work well for us on different hardware.  This box is a Dell PowerEdge with Broadcom chips (e1000).  Ever heard of this type of behavior?  Any ideas?

Thanks,
Gabe

P.S.  Additional info:

It's running Ubuntu 6.06 LTS Server (updated) with the official Xen 3.0.2 kernel.

# lspci | grep Ether
Intel Corporation 82544EI Gigabit Ethernet Controller (Copper) (rev 02)
Intel Corporation 82544EI Gigabit Ethernet Controller (Copper) (rev 02)

P.P.S.  D'oh!  I just noticed all of these dropped packets shown below (vif0.0, vif12.0, vif12.1, vif12.2, vif13.0).   Now I have to figure out what that means.

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:89084 errors:0 dropped:0 overruns:0 frame:0
          TX packets:110727 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:24713772 (23.5 MiB)  TX bytes:18362931 (17.5 MiB)
          Base address:0xdce0 Memory:feb60000-feb80000

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:79852 errors:0 dropped:0 overruns:0 frame:0
          TX packets:60698 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:13187315 (12.5 MiB)  TX bytes:10060245 (9.5 MiB)

vif12.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3856 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5290 errors:0 dropped:224 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:471277 (460.2 KiB)  TX bytes:1723434 (1.6 MiB)

vif12.1   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1030 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1817 errors:0 dropped:223 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1230197 (1.1 MiB)  TX bytes:132427 (129.3 KiB)

vif12.2   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:1484 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif13.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4850 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2441 errors:0 dropped:97 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:842701 (822.9 KiB)  TX bytes:1314526 (1.2 MiB)

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4470 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:202946 (198.1 KiB)  TX bytes:468 (468.0 b)

-- 
Gabriel Gunderson
http://gundy.org
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