RE: Bridging - cannot ping other DomU hosts

["Doug Sampson" <dougs%dawnsign.com@localhost>]

> I just tried with a win2003 domU. With the e1000 emulation I
> can't ping another
> domU on the same domain, but this works with the rtl8139
> emulation it works.
> 
> Did you try to tcpdump both tap interfaces when tring to ping ?
> tcpdump -e -vv may be needed to see all interesting parameters.
> 

Pinging win2003cert from win2003dc:

xen# tcpdump -e -vv host win2003cert and win2003dc
tcpdump: listening on wm0, link-type EN10MB (Ethernet), capture size 96
bytes
15:00:30.196144 00:16:3e:00:00:14 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003cert.dawnsign.com tell
win2003dc.dawnsign.com
15:00:35.485855 00:16:3e:00:00:14 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003cert.dawnsign.com tell
win2003dc.dawnsign.com
15:00:40.985944 00:16:3e:00:00:14 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003cert.dawnsign.com tell
win2003dc.dawnsign.com
15:00:46.486107 00:16:3e:00:00:14 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003cert.dawnsign.com tell
win2003dc.dawnsign.com
^C
4 packets captured
288590 packets received by filter
0 packets dropped by kernel
xen#


When pinging win2003dc from win2003cert, tcpdump output as follows:

xen# tcpdump -e -vv host win2003cert and win2003dc
tcpdump: listening on wm0, link-type EN10MB (Ethernet), capture size 96
bytes
15:08:13.500213 00:16:3e:00:00:13 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003dc.dawnsign.com tell
win2003cert.dawnsign.com
15:08:18.646704 00:16:3e:00:00:13 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003dc.dawnsign.com tell
win2003cert.dawnsign.com
15:08:24.147708 00:16:3e:00:00:13 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003dc.dawnsign.com tell
win2003cert.dawnsign.com
15:08:29.646873 00:16:3e:00:00:13 (oui Unknown) > Broadcast, ethertype
ARP (0x0806), length 42: arp who-has win2003dc.dawnsign.com tell
win2003cert.dawnsign.com
^C
4 packets captured
288590 packets received by filter
0 packets dropped by kernel
xen#

Win2003dc has vif model set to 'rtl8139' while win2003cert does *not*
have vif model set.

Do I need to refine the network interface further on the Xen host?

~Doug