Ask Your Question

tardis's profile - activity

2015-04-30 13:23:20 -0500 received badge  Famous Question (source)
2014-11-19 03:01:43 -0500 received badge  Famous Question (source)
2014-08-02 14:17:19 -0500 received badge  Notable Question (source)
2014-08-02 14:17:19 -0500 received badge  Popular Question (source)
2014-05-19 04:54:17 -0500 received badge  Notable Question (source)
2014-05-16 00:34:55 -0500 received badge  Popular Question (source)
2014-05-15 22:16:10 -0500 commented answer Why do not need set promiscuous mode of data nic in OpenStack vlan?

Thanks from the reply. My question is why do not need? In no-promiscuous mode, the nic will filter the data package that have not the same mac as physical nic, and so I think the vm have different mac would not receive the data package through the physical nic.

2014-05-15 20:30:17 -0500 asked a question Why do not need set promiscuous mode of data nic in OpenStack vlan?

Why do not need set promiscuous mode of data nic in OpenStack vlan? If this, will the nic not filter the data packages that haven't the same mac as physical nic?

2013-12-16 20:50:33 -0500 asked a question OpenStack Havana Vlan Config problem

My environment is Centos6.4 with OpenStack Havana and vlan network. It runs correctly when I use L2 switch of Intel which doesn't support vlan tag. But when I change the switch to Cisco3560 which is L3 and can support vlan tag, it doesn't work at first. I also set all the interfaces in the switch to trunk and the vlan range is 2-1001.

But strange thing happened, when I set a switch interface to access, and assign it the vlan id that is the tenant external vlan id(not internal), the network works now.

I am totally confused. who can explain it and give me a solution?

Best wishes

2013-12-16 20:33:44 -0500 received badge  Supporter (source)
2013-12-16 20:33:38 -0500 received badge  Scholar (source)
2013-12-12 07:34:35 -0500 received badge  Famous Question (source)
2013-12-12 02:29:57 -0500 received badge  Notable Question (source)
2013-12-07 14:45:57 -0500 received badge  Popular Question (source)
2013-12-04 02:01:09 -0500 asked a question Havana neutron gre slow performance

I have a problem about vm connectivity using GRE tunnel and my environment is CentOS6.4 and OpenStack Havana. It is very slow between vm connectivity, but not between vm and internet.

I try

ethtool -K eth0 gro off

But it is only helpful to vm and internet. And I also try to edit l3_agent.ini and dhcp_agent.ini to set the ovs_use_veth=true, but it is unuseful for me.

2013-09-09 18:27:24 -0500 received badge  Student (source)
2013-08-30 11:51:18 -0500 received badge  Famous Question (source)
2013-08-26 00:06:20 -0500 received badge  Notable Question (source)
2013-08-10 05:33:32 -0500 received badge  Popular Question (source)
2013-08-08 01:42:12 -0500 asked a question External network Cannot ping vm successfully

My environment is ubuntu 13.04 64bit server and openstack grizzly, single node with OpenVSwitch. Here is my config:


# The loopback network interface
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static

# The primary network interface
auto eth1
iface eth1 inet manual
        up ifconfig $IFACE up
        down ifconfig $IFACE down

auto br-ex
iface br-ex inet static
        # dns-* options are implemented by the resolvconf package, if installed


#Under the database section
sql_connection = mysql://quantumUser:quantumPass@

#Under the OVS section
tenant_network_type = gre
tunnel_id_ranges = 1:1000
integration_bridge = br-int
tunnel_bridge = br-tun
local_ip =
enable_tunneling = True

#Firewall driver for realizing quantum security group function
firewall_driver = quantum.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

I have two vms, and of floatingip, and of internal ip. In vm, I can ping both floatingip and internal ip succcessfully, but the vm cannot reach external network and either external network. I cannot ping successfully that is the router gateway.