Re: [CentOS] Network broke for a while when libvirtd start
Never mind, I have found the reason. When libvirtd started, it will create bridge virbr0 and then write 1 to /proc/sys/net/ipv4/ip_forward (0 in default). Set ip_forward from 0 to 1 will cause ixgbe driver reset NIC, so the network broke for a while. > -Original Messages- > From: "Genghuang Wang" > Sent Time: 2018-02-24 14:34:16 (Saturday) > To: "CentOS mailing list" > Cc: > Subject: Re: [CentOS] Network broke for a while when libvirtd start > > Hello > > > When start service libvirtd by > > > > service libvirtd start > > > > > OS: CentOS 6.5 > > libvirt: libvirt-daemon-1.2.5-1.mira1.x86_64 > > https://www.redhat.com/mailman/listinfo/libvirt-users > is the official mailing list for the libvirt daemon, maybe you can ask > in there and get better support. > > > Does anyone know the reason? > > This mailing list is for the general usage of the CentOS system, I am > afraid that not many experts about libvert could be found here. > > If you ask in the most appropriate mailing list, you may get the > quickest and the most helpful assistance. > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Network broke for a while when libvirtd start
Hello > When start service libvirtd by > > service libvirtd start > > OS: CentOS 6.5 > libvirt: libvirt-daemon-1.2.5-1.mira1.x86_64 https://www.redhat.com/mailman/listinfo/libvirt-users is the official mailing list for the libvirt daemon, maybe you can ask in there and get better support. > Does anyone know the reason? This mailing list is for the general usage of the CentOS system, I am afraid that not many experts about libvert could be found here. If you ask in the most appropriate mailing list, you may get the quickest and the most helpful assistance. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] Network broke for a while when libvirtd start
When start service libvirtd by service libvirtd start the network will broke for a while and then reconnected. Following is /var/log/messages: Feb 24 13:28:51 node-0 kernel: lo: Dropping TSO features since no CSUM feature. Feb 24 13:28:51 node-0 kernel: lo: Disabled Privacy Extensions Feb 24 13:28:51 node-0 kernel: virbr0: Dropping TSO features since no CSUM feature. Feb 24 13:28:51 node-0 kernel: virbr0: Dropping TSO6 features since no CSUM feature. Feb 24 13:28:51 node-0 kernel: device virbr0-nic entered promiscuous mode Feb 24 13:28:51 node-0 kernel: virbr0: starting userspace STP failed, starting kernel STP Feb 24 13:28:51 node-0 kernel: ip_tables: (C) 2000-2006 Netfilter Core Team Feb 24 13:28:51 node-0 kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max) Feb 24 13:28:51 node-0 kernel: virbr0: topology change detected, propagating Feb 24 13:28:51 node-0 kernel: virbr0: port 1(virbr0-nic) entering forwarding state Feb 24 13:28:51 node-0 kernel: 8021q: adding VLAN 0 to HW filter on device virbr0 Feb 24 13:28:51 node-0 kernel: ixgbe :02:00.0: eth2: detected SFP+: 3 Feb 24 13:28:52 node-0 kernel: ixgbe :02:00.1: eth3: detected SFP+: 4 Feb 24 13:28:52 node-0 kernel: bonding: bond0: link status definitely down for interface eth2, disabling it Feb 24 13:28:52 node-0 kernel: virbr0: port 1(virbr0-nic) entering disabled state Feb 24 13:28:52 node-0 kernel: bonding: bond0: link status definitely down for interface eth3, disabling it Feb 24 13:28:53 node-0 kernel: ixgbe :02:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX Feb 24 13:28:53 node-0 kernel: bond0: link status definitely up for interface eth2, 1 Mbps full duplex. Feb 24 13:28:53 node-0 kernel: ixgbe :02:00.1: eth3: NIC Link is Up 10 Gbps, Flow Control: RX/TX Feb 24 13:28:53 node-0 kernel: bond0: link status definitely up for interface eth3, 1 Mbps full duplex. OS: CentOS 6.5 libvirt: libvirt-daemon-1.2.5-1.mira1.x86_64 Does anyone know the reason? ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
