Sujata wrote: > Bernd, > Can you give more information about how these two hosts are connected with the network? Are they stand alone PC ? Not much idea about KVM guests, > but hope they both have different mac addresses configured. > Some info i could find > http://pic.dhe.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaat%2Fliaatkvmsecbridge.htm I will check this out. > If there is a loop you will observe loss in the connectivity because there are too many packets, and it can even bring your network down. This loop can > be because of actually someone connecting the cable unknowingly to create loop or could be because of mac address misconfiguration. Hi, this is host 1: pc60181:~ # ifconfig br0 Link encap:Ethernet HWaddr 54:04:A6:94:F4:93 inet addr:10.35.23.36 Bcast:10.35.23.0 Mask:255.255.255.0 inet6 addr: fe80::5604:a6ff:fe94:f493/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:96577377 errors:0 dropped:984324 overruns:0 frame:0 TX packets:2850316 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4759340379 (4538.8 Mb) TX bytes:2572455294 (2453.2 Mb) eth0 Link encap:Ethernet HWaddr 54:04:A6:94:F4:93 inet6 addr: fe80::5604:a6ff:fe94:f493/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:679910674 errors:0 dropped:143234 overruns:0 frame:0 TX packets:21189328 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:95708623626 (91274.8 Mb) TX bytes:6925373212 (6604.5 Mb) Interrupt:58 Base address:0x6000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:6302223 errors:0 dropped:0 overruns:0 frame:0 TX packets:6302223 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4358763975 (4156.8 Mb) TX bytes:4358763975 (4156.8 Mb) vnet0 Link encap:Ethernet HWaddr FE:54:00:37:92:A0 inet6 addr: fe80::fc54:ff:fe37:92a0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:256480 errors:0 dropped:0 overruns:0 frame:0 TX packets:94996736 errors:0 dropped:0 overruns:76039 carrier:0 collisions:0 txqueuelen:500 RX bytes:23357891 (22.2 Mb) TX bytes:5963949911 (5687.6 Mb) and this is the guest from host 1: vm59093-4:~ # ifconfig eth0 Link encap:Ethernet HWaddr 52:54:00:37:92:A0 inet addr:10.35.23.37 Bcast:10.35.23.0 Mask:255.255.255.0 inet6 addr: fe80::5054:ff:fe37:92a0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:95009948 errors:0 dropped:1035015 overruns:0 frame:0 TX packets:256503 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5965018596 (5688.6 Mb) TX bytes:23359469 (22.2 Mb) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2173318 errors:0 dropped:0 overruns:0 frame:0 TX packets:2173318 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:262781653 (250.6 Mb) TX bytes:262781653 (250.6 Mb) The bridge on the host connects the network adpater from the vm and eth from the host to the network. Using this configuration you can directly access the guest from the network. host 2: sunhb58820:~ # ifconfig bond0 Link encap:Ethernet HWaddr 68:B5:99:C2:4A:36 inet6 addr: fe80::6ab5:99ff:fec2:4a36/64 Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:905267861 errors:0 dropped:295560887 overruns:0 frame:68 TX packets:170715934 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:96074047195 (91623.3 Mb) TX bytes:11282104398 (10759.4 Mb) br0 Link encap:Ethernet HWaddr 68:B5:99:C2:4A:36 inet addr:146.107.235.132 Bcast:146.107.235.255 Mask:255.255.255.0 inet6 addr: fec0::c:6ab5:99ff:fec2:4a36/64 Scope:Site inet6 addr: 2002:926b:eb6d:c:6ab5:99ff:fec2:4a36/64 Scope:Global inet6 addr: fe80::6ab5:99ff:fec2:4a36/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:375609426 errors:0 dropped:9802456 overruns:0 frame:0 TX packets:1339407 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:29593812134 (28222.8 Mb) TX bytes:404876888 (386.1 Mb) eth0 Link encap:Ethernet HWaddr 68:B5:99:C2:4A:36 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:609403504 errors:0 dropped:1341840 overruns:0 frame:64 TX packets:170679495 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:66365552270 (63291.1 Mb) TX bytes:11279463931 (10756.9 Mb) Interrupt:16 eth1 Link encap:Ethernet HWaddr 68:B5:99:C2:4A:36 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:295864357 errors:0 dropped:294081414 overruns:0 frame:4 TX packets:36439 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:29708494925 (28332.2 Mb) TX bytes:2640467 (2.5 Mb) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4909474 errors:0 dropped:0 overruns:0 frame:0 TX packets:4909474 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1011946434 (965.0 Mb) TX bytes:1011946434 (965.0 Mb) vnet0 Link encap:Ethernet HWaddr FE:54:00:37:92:AA inet6 addr: fe80::fc54:ff:fe37:92aa/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4244104 errors:0 dropped:0 overruns:0 frame:0 TX packets:89645671 errors:0 dropped:0 overruns:517 carrier:0 collisions:0 txqueuelen:500 RX bytes:285274656 (272.0 Mb) TX bytes:17771059319 (16947.8 Mb) and the guest from host 2: vm58820-1:~ # ifconfig eth2 Link encap:Ethernet HWaddr 52:54:00:37:92:AA inet addr:10.35.23.45 Bcast:10.35.23.0 Mask:255.255.255.0 UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27714408 errors:0 dropped:0 overruns:0 frame:0 TX packets:4244063 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14087082668 (13434.4 Mb) TX bytes:285283904 (272.0 Mb) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2423627 errors:0 dropped:0 overruns:0 frame:0 TX packets:2423627 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:657301795 (626.8 Mb) TX bytes:657301795 (626.8 Mb) vmnet1 Link encap:Ethernet HWaddr 00:50:56:C0:00:01 inet addr:172.16.151.1 Bcast:172.16.151.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vmnet8 Link encap:Ethernet HWaddr 00:50:56:C0:00:08 inet addr:192.168.156.1 Bcast:192.168.156.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) All guests and hosts can easily access the network. Bernd Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH) Ingolstädter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe Geschäftsführer: Prof. Dr. Günther Wess Dr. Nikolaus Blum Dr. Alfons Enhsen Registergericht: Amtsgericht München HRB 6466 USt-IdNr: DE 129521671
