Dear all,
since several days i run Xen 4.1.2 Dom0 (Gentoo Linux x86_64) with several
Gentoo Linux (x86_64) and a "historic" NetBSD 5.99.39 (x86) DomU (guests) -
bridged setup.
I've set up a second bridge on Dom0 and gave each DomU a second network
interface connected to this bridge with a private subnet ip. The private subnet
has no gateway. Connectivity between the Linux hosts (DomU -> DomU and DomU ->
Dom0) works as expected, but communication from/to the NetBSD Domu did not work
properly with "crazy" effects:
I can ping (!) from / to the NetBSD DomU without packet loss, but if i try to
open any TCP connection (ssh, http, smtp) the connection just "hangs".
examples:
========
- If i try to connect a SMTP service at the DomU i get the SMTP banner and two
lines out, can put in i.e. QUIT or help but nothing more happens.
- If i try i.e. mysqlshow against the NetBSD DomU i get an answer if the output
is short - on longer requests i get a auth package error.
Alternatively i tried to set up a second (private) subnet as aliases on the
first interfaces / bridge with same effect.
The interesting thing is that exactly these had worked properly with an older
Dom0 setup with XEN 3.4.2 and 2.6.34-xen-r2 x86_64 kernel (Gentoo Linux).
Here is the config of the second netbsd DomU interface:
--- snip ---
xennet1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities=2800<TCP4CSUM_Tx,UDP4CSUM_Tx>
enabled=0
address: 00:0c:6e:40:38:b2
inet 10.10.10.2 netmask 0xffffff00 broadcast 10.10.10.255
inet6 fe80::20c:6eff:fe40:38b2%xennet1 prefixlen 64 scopeid 0x3
--- snap ---
And here the bridge configuration:
--- snip ---
xen ~ # brctl show
bridge name bridge id STP enabled interfaces
xenbr0 8000.001cc441f06a no eth1
vif1.0
vif10.0
vif4.0
vif5.0
xenint0 8000.001cc441f07e no eth0
vif10.1
vif4.1 (-> NetBSD DomU)
xen ~ # ifconfig xenint0
xenint0 Link encap:Ethernet HWaddr 00:1c:c4:41:f0:7e
inet addr:10.10.10.1 Bcast:10.10.10.255 Mask:255.255.255.0
inet6 addr: fe80::fc20:77ff:fee7:5fd6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2103 errors:0 dropped:0 overruns:0 frame:0
TX packets:3486 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:124835 (121.9 KiB) TX bytes:297380 (290.4 KiB)
--- snap ---
Is this a problem of the NetBSD DomU build or the newer Xen 4.1.2 software
version?
Any help or hint is welcome here?
Many thanks in advance.
best regards,
Niels.
--
---
Niels Dettenbach
Syndicat IT&Internet
http://www.syndicat.com/Attachment:
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