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checksum errors from internel vm NIC

asked 2014-09-05 14:17:34 -0500

XicoLoco gravatar image

updated 2014-09-08 17:06:56 -0500

anyone knows what this can be ? the vm not frozes just stucked waiting next tcp package ... mostly with ls /dev or top command

i already try to change NIC card driver and get errors too

checksum errors from internel vm NIC

root@compute1:~# tcpdump -i tapec1b492a-69 -vvv -XX | grep incorrect
tcpdump: WARNING: tapec1b492a-69: no IPv4 address assigned
tcpdump: listening on tapec1b492a-69, link-type EN10MB (Ethernet), capture size 65535 bytes

192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8947 (incorrect -> 0xab8a), seq 3787937642:3787939102, ack 2630473796, win 775, length 1460
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x20ba), seq 2112, ack 49, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x208a), seq 2112, ack 97, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x205a), seq 2112, ack 145, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x202a), seq 2112, ack 193, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1ffa), seq 2112, ack 241, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1fca), seq 2112, ack 289, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1f9a), seq 2112, ack 337, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1f6a), seq 2112, ack 385, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1f3a), seq 2112, ack 433, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1f0a), seq 2112, ack 481, win 775, length 0
192.168.1.115.ssh > 192.168.0.181.20948: Flags [.], cksum 0x8393 (incorrect -> 0x1eda), seq 2112, ack 529, win 775, length 0

its looks like a TAP problem because he is droping ... before TAP is normal

here is my nova.conf

    `    root@compute1:~# more /etc/nova/nova.conf
[DEFAULT]
dhcpbridge_flagfile=/etc/nova/nova.conf
dhcpbridge=/usr/bin/nova-dhcpbridge
logdir=/var/log/nova
state_path=/var/lib/nova
lock_path=/var/lock/nova
force_dhcp_release=True
iscsi_helper=tgtadm
libvirt_use_virtio_for_bridges=True
connection_type=libvirt
root_helper=sudo nova-rootwrap /etc/nova/rootwrap.conf
verbose=True
ec2_private_dns_show_ip=True
api_paste_config=/etc/nova/api-paste.ini
volumes_path=/var/lib/nova/volumes
enabled_apis=ec2,osapi_compute,metadata

auth_strategy = keystone

rpc_backend = rabbit
rabbit_host = controller
rabbit_password = tetudaTotosa

my_ip = 10.0.0.31
vnc_enabled = True
vncserver_listen = 0.0.0.0
vncserver_proxyclient_address = 10.0.0.31
novncproxy_base_url = http://controller:6080/vnc_auto.html

glance_host = controller

network_api_class = nova.network.neutronv2.api.API
neutron_url = http://network:9696
neutron_auth_strategy = keystone
neutron_admin_tenant_name = service
neutron_admin_username = neutron
neutron_admin_password = tetudaTotosa
neutron_admin_auth_url = http://controller:35357/v2.0
linuxnet_interface_driver = nova.network.linux_net.LinuxOVSInterfaceDriver
firewall_driver = nova.virt.firewall.NoopFirewallDriver
security_group_api = neutron

compute_driver = libvirt.LibvirtDriver
cpu_mode=host-passthrough ...
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have posted more info above but what info do you need ?

XicoLoco gravatar imageXicoLoco ( 2014-09-08 15:51:05 -0500 )edit

Edit the question, don't use the space for answers to provide more details. What version of openstack are you running? how did you install? are you using neutron? nova network? which plugins? which hypervisor? etc

smaffulli gravatar imagesmaffulli ( 2014-09-08 15:54:40 -0500 )edit

i just test with another two linux .... the ubuntu 12.04 have the same issue... but i have isntaled with the centos 6.5 and the issue just disapear ... any ideas ?

XicoLoco gravatar imageXicoLoco ( 2014-09-09 15:37:49 -0500 )edit

1 answer

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answered 2014-09-17 17:27:55 -0500

XicoLoco gravatar image

i have done another openstack icehouse install with debian 7 and there the issue dont exist ... so the problems looks like from ubuntu 12.04 and 14 ....

if anyone have any idea why please share ... its a terrible distro problem from ubuntu and anyone must know why ...

besides that i consider this answwered ...

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Asked: 2014-09-05 14:17:34 -0500

Seen: 472 times

Last updated: Sep 17 '14