Re: [libvirt-users] SSH from host to domain using hostname

19. Juli 2017 17:12, c.monty(a)web.de schrieb: > 19. Juli 2017 16:36, "Michal Privoznik" <mprivozn(a)redhat.com&gt; schrieb: > >> On 07/19/2017 04:27 PM, c.monty(a)web.de wrote: >> >>> <snip/> >>> >>> Guest OS is Debian 9 with this network configuration: >>> thomas@vm02-fai:~$ cat /etc/network/interfaces >>> # This file describes the network interfaces available on your system >>> # and how to activate them. For more information, see interfaces(5). >>> >>> source /etc/network/interfaces.d/* >>> >>> # The loopback network interface >>> auto lo >>> iface lo inet loopback >>> >>> # The primary network interface >>> allow-hotplug ens3 >>> iface ens3 inet dhcp >>> >>> # The secondary network interface >>> allow-hotplug ens8 >>> iface ens8 inet static >>> address 192.168.33.250/25 >>> >>> So, to answer your question: yes, 1st interface is doing DHCP. >> >> Well, this doesn't prove it. ens3 might actually be the one that's >> connected to the 'internal' network. What's the output of 'ip a a s' ran >> from within the guest? What's the output of 'virsh domifaddr --source >> agent $domain'? >> >> BTW: if you sniff on virbr0 while the domain is starting up do you see >> any DHCP traffic? >> >> Michal > > Hm... 'ip a a s' is not working. Do you mean 'ip addr'? > root@vm02-fai:/home/thomas# ip a a s > Error: inet prefix is expected rather than "s". > > root@vm02-fai:/home/thomas# ip addr > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > inet 127.0.0.1/8 scope host lo > valid_lft forever preferred_lft forever > inet6 ::1/128 scope host > valid_lft forever preferred_lft forever > 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen > 1000 > link/ether 52:54:00:31:dd:59 brd ff:ff:ff:ff:ff:ff > inet 192.168.100.52/24 brd 192.168.100.255 scope global ens3 > valid_lft forever preferred_lft forever > inet6 fe80::5054:ff:fe31:dd59/64 scope link > valid_lft forever preferred_lft forever > 3: ens8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen > 1000 > link/ether 52:54:00:9e:23:26 brd ff:ff:ff:ff:ff:ff > inet 192.168.33.250/25 brd 192.168.33.255 scope global ens8 > valid_lft forever preferred_lft forever > inet6 fe80::5054:ff:fe9e:2326/64 scope link > valid_lft forever preferred_lft forever > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users Update: I have captured packets on virbr0 using tcpdump. The saved packets are attached in file virbr0.pcap to this email. In my 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