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...y understanding this confirms DHCP request of guest / domain: ld4004:~ # tcpdump -r /tmp/virbr0.pcap reading from file /tmp/virbr0.pcap, link-type EN10MB (Ethernet) 17:10:31.433263 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 1 group record(s), length 28 17:10:31.434772 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 52:54:00:31:dd:59 (oui Unknown), length 300 17:10:31.435007 IP 192.168.100.1.bootps > 192.168.100.52.bootpc: BOOTP/DHCP, Reply, length 313 17:10:31.513284 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), lengt...

...0.0.5.187 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on virbr1, link-type EN10MB (Ethernet), capture size 96 bytes 17:57:29.809278 IP 10.0.5.50 > 10.0.5.187: ICMP echo request, id 189, seq 0, length 28 17:57:30.181841 IP 10.0.5.50.bootps > 10.0.5.187.bootpc: BOOTP/DHCP, Reply, length: 300 17:57:32.744740 IP 10.0.5.187.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 00:95:12:7e:ee:71 (oui Unknown), length: 548 17:57:32.755528 IP 10.0.5.50.bootps > 10.0.5.187.bootpc: BOOTP/DHCP, Reply, length: 300 17:57:32.782129 arp who-has 10.0.5.25 te...

...idge works perfecly (so I think the problem is not OpenVPN-related). If I start a DHCPd on the server and I configure the remote client to get the IP from it, something strange happens: if I "sniff" on the br0 interface, I can see the DHCP requests coming from the client (from 0.0.0.0.bootpc to 255.255.255.bootps) and the DHCPd answers going back from ip.of.the.server.bootps to 255.255.255.255.bootpc; also sniffing on eth0 gives the same result, but if I sniff on the tap0 interface, I don't see the replies! So the client never get its own IP. What I'm doing wrong? To add so...

----- Original Message ----- From: Gene Cumm <gene.cumm at gmail.com> > It's been a while since I used Yahoo but I didn't think I had > that issue.? GMail does default to top-posting Doing it manually... didn't find that option. > Perhaps also try -o 43.x=01:04:0a:d7:90:3c:ff (which will set the > mtftp option) in addition to -W. Tried it but still the same error.

...,linux,Linux install # tftpd base dir tftpdbase=/tftpboot # domain name domain=robonet.at And under /home/clients is installed a full distribution. The boot process is as follows: Client: DHCP Discover Server: DHCP Offer Client: DHCP Request Server: DHCP ACK Client: ARP Server: ARP Client: UDP bootpc->4011 (PXE - The packet seems to be ok.) Server: UDP 4011->bootpc (PXE - The packet seems to be ok.) And just here the boot process hangs. The client repeats the pxe-requests 2 times then it repeats the dhcp-requests and then it repeats the pxe-requests... What's wrong with my configu...

This is what I'm seeing on my DHCP server: # tcpdump -i eth0 -vvv -s 1500 '(port 67 or port 68)' tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1500 bytes 13:24:05.679950 IP (tos 0x0, ttl? 20, id 0, offset 0, flags [none], proto: UDP (17), length: 576) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:24:54:d9:d4:2f (oui Unknown), length 548, xid 0x55d9d42f, secs 4, Flags [ Broadcast ] (0x8000) ????????? Client-Ethernet-Address 00:24:54:d9:d4:2f (oui Unknown) ????????? Vendor-rfc1048 Extensions ??????????? Magic Cookie 0x63825...

...96 Nov 11 15:15 pxelinux.cfg /tftpboot/pxelinux.cfg/default # Perform local boot by default default local # Always prompt prompt 1 # Display boot message display pxeboot.msg # Boot after 30 seconds timeout 300 label local kernel linux localboot 0 tcpdump -i eth0 16:05:14.643828 0.0.0.0.bootpc > 255.255.255.255.bootps: xid:0x4c34d1a secs:4 flags:0x8000 vend-rfc1048 DHCP:DISCOVER PR:SM+DG+DG+IEN+NS+RL+HN+BS+DN+SS+RP+EP+VO+SID+VC+BF+T-128+T-127+T-126+T-125 +T-124+T-123+T-122+T-121 MSZ:1260 GUID:0.153.126.147.29.61.6.213.17.168.0.172.205.241.234.57.29 ARCH:0 NDI:1.2.1 VC:80.88.69.67.108...

...ch type of linux). I'm trying to boot the system from the network and it seems to be getting to downloading pxelinux.0 but then nothing happens after that.... I'm using ISC dhcpd V3.0pl2, tftp-hpa 0.34 and pxelinux 2.04. Here is a tcpdump of what's happening: 21:59:14.792397 0.0.0.0.bootpc > 255.255.255.255.bootps: xid:0x64c4edbb secs:4 flags:0x8000 [|bootp] 21:59:14.793743 sole2.bootps > 255.255.255.255.bootpc: xid:0x64c4edbb secs:4 fl ags:0x8000 Y:musica S:sole2 [|bootp] [tos 0x10] 21:59:16.795384 0.0.0.0.bootpc > 255.255.255.255.bootps: xid:0x64c4edbb secs:4 flags:0x80...

...lso connects to adept the DHCP (172.16.1.7). This net (172.16.1.0) shall be connected to 172.16.2.0 using the other NIC 172.16.2.1 (eth0, not in DNS). Attached to it is my WLAN access point (ymir, 172.16.2.12). And this is what happens: #> dhcrelay -i eth0 adept.mgr #> tcpdump -i any port bootpc or port bootps 09:42:09.996479 172.16.1.12.bootpc > 255.255.255.255.bootps: xid:0x960f0000 flags:0x8000 [|bootp] 09:42:09.997009 surtur.mgr.bootps > adept.mgr.bootps: (request) xid:0x960f0000 flags:0x8000 G:172.16.2.1 ether 0:9:5b:68:19:fb [|bootp] (DF) 09:42:09.997603 adept.mgr.bootps &g...

...ere''s no general networking problem. I use the xen 3.2 packages for CentOS on CentOS 5.1. There was a public IP address on eth0 and a private IP address on eth0:0. I changed that around after I discovered with tcpdump that dhcpd was replying on eth0 like publicip.bootps -> privateip.bootpc. This isn''t a problem for all other packets, but apparently for DHCP. Bridging is setup with the standard Xen 3.2 network-bridge script by xend like this: bridge name bridge id STP enabled interfaces eth0 8000.000c6e101f84 no vif3.0...

...d it works. Now when I try to load pxelinux.0 with the Acer PXE client I get the following error: Missing mode. Here is the packet trace ... [xserve:/usr/libexec] yves% sudo tcpdump -i en0 -s 0 -X host 192.168.1.10 tcpdump: listening on en0 10:42:49.273193 192.168.1.1.bootps > 192.168.1.10.bootpc: xid:0x40ab183f flags:0x8000 Y:192.168.1.10 S:192.168.1.1 sname "xserve" vend-rfc1048 DHCP:OFFER SID:192.168.1.1 LT:3564 SM:255.255.255.0 DG:192.168.1.1 NS:192.168.1.1 DN:"" BF:"/private/tftpboot/pxelinux.0" 0x0000 4500 014e e4d4 0000 ff11 526e c0a8 0101...

Hi Guys, i have a problem with PXE/UEFI Boot. Legacy PXE Boot is working fine. I use Dnsmasq with integrated tftp. As Mentioned above, legacy pxe boot is working fine, tcpdump shows: --- start tcpdump legacy pxe boot --- 13:44:16.589197 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from f8:ca:b8:06:7d:ed (oui Unknown), length 548 13:44:20.543910 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from f8:ca:b8:06:7d:ed (oui Unknown), length 548 13:44:20.570008 ARP, Request who-has dhcp.localdomain tell 172.22.135...

Greetings Laine, > You haven't said which distro, nor what is the libvirt exact libvirt > version (probably won't matter in this case, but in general "libvirt > x.y.z" is more useful than "latest stable libvirt"). you are correct, the previous os was debian 10 with libvirt 3, the new os is gentoo with libvirt 6.2.0 > > If you have full connectivity

Adding -kd to extra line drops me to kmdb :- root@ServerJaunty:/home/boris/nevada# xm create -c osol.install Using config file "./osol.install". Started domain osol.install (id=4) Loading kmdb... Welcome to kmdb Loaded modules: [ unix krtld genunix ] [0]> I want patch kernel like it happens when adding to /etc/system:- set xnf:xnf_cksum_offload = 0

...on the current master everything is working fine. This was with tested against 26d37f75aff50879795692728dbeb8ca57a8a226. We're not using uefi for this test. (The machine is actually a KVM instance in OpenStack.) I've captured the following DHCP ACK: 10.141.20.1.bootps > 10.141.20.2.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 399, xid 0xf0eb955a, secs 14, Flags [none] (0x0000) Your-IP 10.141.20.2 Server-IP 10.141.255.254 Client-Ethernet-Address fa:16:3e:08:31:b9 Vendor-rfc1048 Extensions Magic Cookie 0x63825363...

...e > > DHCP server). Once you find the point that the packet is blocked, you'll > > be better able to determine why. > > > > > > alright, I'll try that, thanks. > I've ran tcpdump on the vm's tap device, here is what I see: 01:42:15.404754 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 52:54:00:5a:4c:8c (oui Unknown), length 548 01:42:15.405075 IP Broadcom.Home.bootps > 10.0.0.40.bootpc: BOOTP/DHCP, Reply, length 300 01:42:15.735893 STP 802.1d, Config, Flags [none], bridge-id 8000.52:54:00:6b:1b:92.8003, length 35 01:42:17....

Summary: if you have C5 guests with dhclient "bad udp checksum" issues then this entry on the host will fix it: iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill Detail: If anyone else is seeing this... Feb 11 19:22:11 mercury dhclient: DHCPREQUEST on eth0 to 255.255.255.255 port 67 (xid=0x63be132a) Feb 11 19:22:56 mercury last message repeated 3 times Feb 11 19:23:12 mercury dhclient: DHCPREQUEST on eth0 to 255.255.255.255 po...

On 2015-09-12 04:58, Gene Cumm wrote: >> I've captured the following DHCP ACK: >> >> 10.141.20.1.bootps > 10.141.20.2.bootpc: [udp sum ok] BOOTP/DHCP, Reply, >> length 399, xid 0xf0eb955a, secs 14, Flags [none] (0x0000) >> Your-IP 10.141.20.2 >> Server-IP 10.141.255.254 >> Client-Ethernet-Address fa:16:3e:08:31:b9 >> Vendor-rfc1048 Extensions >&...

Hi. I spawned a thread last week about the failure of bridged networking and I have gotten a little further. Turns out that I _do_ have network connectivity from inside the domains, but I cannot get the network to come up when I boot. I have to login and start up the network manually. E.g. after installing Debian Sarge according to the debootstrap method outlined in the users manual, I created a

...DROP) target???? prot opt source?????????????? destination???????? ACCEPT???? all? --? anywhere???????????? anywhere??????????? state RELATED,ESTABLISHED In_RULE_0? all? --? anywhere???????????? 172.16.2.14???????? In_RULE_2? udp? --? 192.168.57.1???????? anywhere??????????? udp multiport dports bootpc,bootps state NEW Chain FORWARD (policy DROP) target???? prot opt source?????????????? destination???????? ACCEPT???? all? --? anywhere???????????? anywhere??????????? state RELATED,ESTABLISHED Chain OUTPUT (policy DROP) target???? prot opt source?????????????? destination???????? ACCEPT???? a...