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Re: [Xen-users] new xen guest cannot communicate with the network

  • To: Wei Liu <wei.liu2@xxxxxxxxxx>
  • From: simon ben <guy20034u@xxxxxxxxx>
  • Date: Wed, 12 Feb 2014 00:51:37 -0800 (PST)
  • Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Wed, 12 Feb 2014 08:52:59 +0000
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  • List-id: Xen user discussion <xen-users.lists.xen.org>

Dear Guys,
please excuse me and take it as a new post
I was a little worked up so i decide i start right from scratch and since this are new Cisco Blade servers and not yet in procduction i had the liberty to play around

Now i do face a issue again which i feel is quite weird..
let me explain..
I did install centos 6.5 and xen as per the docs below and everything went smooth
now the server has 2 NIC and I can reach the server from out entire network..
xm info shows the below
[root@xenserver1 scripts]# xm info
host                   : xenserver1.baladia.gov.kw
release                : 3.10.29-11.el6.centos.alt.x86_64
version                : #1 SMP Tue Feb 11 22:00:02 UTC 2014
machine                : x86_64
nr_cpus                : 24
nr_nodes               : 2
cores_per_socket       : 6
threads_per_core       : 2
cpu_mhz                : 2000
hw_caps                : bfebfbff:2c100800:00000000:00003f40:17bee3ff:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 32698
free_memory            : 30222
free_cpus              : 0
xen_major              : 4
xen_minor              : 2
xen_extra              : .3-27.el6
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
xen_commandline        : dom0_mem=2048M,max:3072M loglvl=all guest_loglvl=all
cc_compiler            : gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
cc_compile_by          : mockbuild
cc_compile_domain      : centos.org
cc_compile_date        : Fri Jan 24 20:49:25 UTC 2014
xend_config_format     : 4
to enable multiple guest network bridges to use multiple network cards i followed the link below


but when i run brctl show it only shows me

bridge name     bridge id               STP enabled     interfaces
virbr0          8000.000000000000       yes


where could I be going wrong .. is there any debugging i can do and which logs will help me
i tried looking at /var/log/xen/ directory but nothing much

Thanks and regards

i really would appreciate your help and response
will start with guest VM once this issue is sorted

On Monday, February 10, 2014 1:37 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
On Fri, Feb 07, 2014 at 11:27:58AM -0800, sbdcunha wrote:
> dear wei,
> Thanks for the reply
> but sorry or my delay..
> from the xen dom0 i can ping the gateway perfectly and not only that i can
> reach any host on our network
> but from the xen guest that is domU i cannot ping the gateway neither any
> hosts on the same network or other  but only xen dom0
> appreciate your kind help and advice

Have you tried to make your sysctl look like mine? I don't see any Xen
specific problem here so you should probably consult your local network
administrators / experts, as this problem might be related to your local
network setup.


> regards
> simon
> --
> View this message in context: http://xen.1045712.n5.nabble.com/new-xen-guest-cannot-communicate-with-the-network-tp5721108p5721189.html
> Sent from the Xen - User mailing list archive at Nabble.com.
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> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxx
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