Fred Oliver wrote: > I'm running a nevada b99 guest on a nevada b99 host. The guest is > configured as a dhcp client. > > When I snoop in dom0 while the guest boots, Which interface are you snooping in dom0? The VNIC, or the interface underlying it? I think if you snooped the VNIC, you should be only seeing one packet, so what you described could be a bug. But, if you snooped the interface underlying the VNIC, you will actually see the packet twice: The first one is the packet sent out from domU The other one is the packet received by the interface you are snooping since it is a broadcast packet.
Max > I see two back-to-back > DHCPREQUEST packets issued by the guest. The first of the two packets > has an empty UDP checksum; otherwise they seem identical. > > Is this a bug? > > Fred Oliver > > > ETHER: ----- Ether Header ----- > ETHER: > ETHER: Packet 246 arrived at 16:27:44.20927 > ETHER: Packet size = 342 bytes > ETHER: Destination = ff:ff:ff:ff:ff:ff, (broadcast) > ETHER: Source = 0:16:3e:1e:87:45, > ETHER: Ethertype = 0800 (IP) > ETHER: > IP: ----- IP Header ----- > IP: > IP: Version = 4 > IP: Header length = 20 bytes > IP: Type of service = 0x00 > IP: xxx. .... = 0 (precedence) > IP: ...0 .... = normal delay > IP: .... 0... = normal throughput > IP: .... .0.. = normal reliability > IP: .... ..0. = not ECN capable transport > IP: .... ...0 = no ECN congestion experienced > IP: Total length = 328 bytes > IP: Identification = 15661 > IP: Flags = 0x4 > IP: .1.. .... = do not fragment > IP: ..0. .... = last fragment > IP: Fragment offset = 0 bytes > IP: Time to live = 255 seconds/hops > IP: Protocol = 17 (UDP) > IP: Header checksum = 3d78 > IP: Source address = 0.0.0.0, OLD-BROADCAST > IP: Destination address = 255.255.255.255, BROADCAST > IP: No options > IP: > UDP: ----- UDP Header ----- > UDP: > UDP: Source port = 68 > UDP: Destination port = 67 (BOOTPS) > UDP: Length = 308 > UDP: Checksum = 0000 (no checksum) > UDP: > DHCP: ----- Dynamic Host Configuration Protocol ----- > DHCP: > DHCP: Hardware address type (htype) = 1 (Ethernet (10Mb)) > DHCP: Hardware address length (hlen) = 6 octets > DHCP: Relay agent hops = 0 > DHCP: Transaction ID = 0x58c771d > DHCP: Time since boot = 0 seconds > DHCP: Flags = 0x0000 > DHCP: Client address (ciaddr) = 0.0.0.0 > DHCP: Your client address (yiaddr) = 0.0.0.0 > DHCP: Next server address (siaddr) = 0.0.0.0 > DHCP: Relay agent address (giaddr) = 0.0.0.0 > DHCP: Client hardware address (chaddr) = 00:16:3E:1E:87:45 > DHCP: > DHCP: ----- (Options) field options ----- > DHCP: > DHCP: Message type = DHCPREQUEST > DHCP: Requested IP Address = 192.168.2.111 > DHCP: IP Address Lease Time = -1 seconds > DHCP: Maximum DHCP Message Size = 1472 bytes > DHCP: Client Class Identifier = "SUNW.i86xpv" > DHCP: Requested Options: > DHCP: 1 (Subnet Mask) > DHCP: 3 (Router) > DHCP: 6 (DNS Servers) > DHCP: 12 (Client Hostname) > DHCP: 15 (DNS Domain Name) > DHCP: 28 (Broadcast Address) > DHCP: 43 (Vendor Specific Options) > > ETHER: ----- Ether Header ----- > ETHER: > ETHER: Packet 247 arrived at 16:27:44.20928 > ETHER: Packet size = 342 bytes > ETHER: Destination = ff:ff:ff:ff:ff:ff, (broadcast) > ETHER: Source = 0:16:3e:1e:87:45, > ETHER: Ethertype = 0800 (IP) > ETHER: > IP: ----- IP Header ----- > IP: > IP: Version = 4 > IP: Header length = 20 bytes > IP: Type of service = 0x00 > IP: xxx. .... = 0 (precedence) > IP: ...0 .... = normal delay > IP: .... 0... = normal throughput > IP: .... .0.. = normal reliability > IP: .... ..0. = not ECN capable transport > IP: .... ...0 = no ECN congestion experienced > IP: Total length = 328 bytes > IP: Identification = 15661 > IP: Flags = 0x4 > IP: .1.. .... = do not fragment > IP: ..0. .... = last fragment > IP: Fragment offset = 0 bytes > IP: Time to live = 255 seconds/hops > IP: Protocol = 17 (UDP) > IP: Header checksum = 3d78 > IP: Source address = 0.0.0.0, OLD-BROADCAST > IP: Destination address = 255.255.255.255, BROADCAST > IP: No options > IP: > UDP: ----- UDP Header ----- > UDP: > UDP: Source port = 68 > UDP: Destination port = 67 (BOOTPS) > UDP: Length = 308 > UDP: Checksum = A129 > UDP: > DHCP: ----- Dynamic Host Configuration Protocol ----- > DHCP: > DHCP: Hardware address type (htype) = 1 (Ethernet (10Mb)) > DHCP: Hardware address length (hlen) = 6 octets > DHCP: Relay agent hops = 0 > DHCP: Transaction ID = 0x58c771d > DHCP: Time since boot = 0 seconds > DHCP: Flags = 0x0000 > DHCP: Client address (ciaddr) = 0.0.0.0 > DHCP: Your client address (yiaddr) = 0.0.0.0 > DHCP: Next server address (siaddr) = 0.0.0.0 > DHCP: Relay agent address (giaddr) = 0.0.0.0 > DHCP: Client hardware address (chaddr) = 00:16:3E:1E:87:45 > DHCP: > DHCP: ----- (Options) field options ----- > DHCP: > DHCP: Message type = DHCPREQUEST > DHCP: Requested IP Address = 192.168.2.111 > DHCP: IP Address Lease Time = -1 seconds > DHCP: Maximum DHCP Message Size = 1472 bytes > DHCP: Client Class Identifier = "SUNW.i86xpv" > DHCP: Requested Options: > DHCP: 1 (Subnet Mask) > DHCP: 3 (Router) > DHCP: 6 (DNS Servers) > DHCP: 12 (Client Hostname) > DHCP: 15 (DNS Domain Name) > DHCP: 28 (Broadcast Address) > DHCP: 43 (Vendor Specific Options) > > > _______________________________________________ > xen-discuss mailing list > [email protected] > _______________________________________________ xen-discuss mailing list [email protected]
