network bridge wonkiness

[Lonni J Friedman]

Yea, I sorted it out.  It was PEBCAK.  I never setup the static IP
address inside the VM that I thought I did.

On Sat, Aug 10, 2013 at 10:54 AM, David A. Bandel
<david.bandel at gmail.com> wrote:
> Hey Lonnie,
>
> Just saw this.  Did you get this figured out?  If not, what does tcpdump on
> the bridge interface show?  Can you see packets from external hosts coming
> in?  If so, are they being answered?  Are you sure you don't have an IP or
> MAC address collision anywhere?
>
> David-
>
>
> On Tue, Aug 6, 2013 at 4:07 PM, Lonni J Friedman <netllama at gmail.com> wrote:
>>
>> I'm attempting to get several virtual machines setup on a Fedora19
>> host system, with the traditional bridge network devices (br0, br1,
>> etc).   I've done this many times before with older versions of Fedora
>> (16, 14, etc), and it just works.  However, for reasons that I cannot
>> figure out, the bridge doesn't seem to be working in Fedora19.  While
>> I can successfully connect to the outside world (local network +
>> internet) from inside a VM, nothing can communicate with the VM from
>> outside (local network).  I'm referring to something as trivial as
>> pinging.  From inside the VM, I can ping anything successfully (0%
>> packet loss).  However, from outside the VM (on the host, or any other
>> system on the same network), I see 100% packet loss when pinging the
>> IP address of the VM.
>>
>> My first question is simply, does anyone else have this working
>> successfully in F19?  And if so, what steps did you need to follow?
>>
>> I'm not using NetworkManager at all, its all the network service.
>> There are no firewalls involved anywhere (iptables & firewall services
>> are currently disabled).  Here's the current host configuration:
>>
>>     # brctl show
>>     bridge name    bridge id        STP enabled    interfaces
>>     br0        8000.38eaa792efe5    no        em2
>>                                 vnet1
>>     br1        8000.38eaa792efe6    no        em3
>>     br2        8000.38eaa792efe7    no        em4
>>                                 vnet0
>>     virbr0        8000.525400db3ebf    yes        virbr0-nic
>>
>>     # more /etc/sysconfig/network-scripts/ifcfg-em2
>>     TYPE=Ethernet
>>     BRIDGE="br0"
>>     NAME=em2
>>     DEVICE="em2"
>>     UUID=aeaa839e-c89c-4d6e-9daa-79b6a1b919bd
>>     ONBOOT=yes
>>     HWADDR=38:EA:A7:92:EF:E5
>>     NM_CONTROLLED="no"
>>
>>     # more /etc/sysconfig/network-scripts/ifcfg-br0
>>     TYPE=Bridge
>>     NM_CONTROLLED="no"
>>     BOOTPROTO=dhcp
>>     NAME=br0
>>     DEVICE="br0"
>>     ONBOOT=yes
>>
>>     # ifconfig em2 ;ifconfig br0
>>     em2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>>             inet6 fe80::3aea:a7ff:fe92:efe5  prefixlen 64  scopeid
>> 0x20<link>
>>             ether 38:ea:a7:92:ef:e5  txqueuelen 1000  (Ethernet)
>>             RX packets 100093  bytes 52354831 (49.9 MiB)
>>             RX errors 0  dropped 0  overruns 0  frame 0
>>             TX packets 25321  bytes 15791341 (15.0 MiB)
>>             TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>             device memory 0xf7d00000-f7e00000
>>
>>     br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>>             inet 10.31.99.226  netmask 255.255.252.0  broadcast
>> 10.31.99.255
>>             inet6 fe80::3aea:a7ff:fe92:efe5  prefixlen 64  scopeid
>> 0x20<link>
>>             ether 38:ea:a7:92:ef:e5  txqueuelen 0  (Ethernet)
>>             RX packets 19619  bytes 1963328 (1.8 MiB)
>>             RX errors 0  dropped 0  overruns 0  frame 0
>>             TX packets 11  bytes 1074 (1.0 KiB)
>>             TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>
>> Relevant section from /etc/libvirt/qemu/foo.xml (one of the VMs with
>> this problem):
>>
>>     <interface type='bridge'>
>>           <mac address='52:54:00:26:22:9d'/>
>>           <source bridge='br0'/>
>>           <model type='virtio'/>
>>           <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
>> function='0x0'/>
>>     </interface>
>>
>> I can provide additional information, if requested.  thanks!
>> _______________________________________________
>> Linux-users mailing list
>> Linux-users at linux-sxs.org
>> http://mailman.celestial.com/mailman/listinfo/linux-users
>
>
>
>
> --
> Two things are infinite: the universe and human stupidity; and I'm not sure
> about the the universe. -- Albert Einstein
> Visit my web page at: http://david.bandel.us/
>
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>



-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama at gmail.com
LlamaLand                       https://netllama.linux-sxs.org