Xen users - May 2009 - Can''t ping gateway (SOLVED !!!!)

HI again,

This is the solution to my problem, hope it helps someone in the future.

First of all, thanks to Ramachandran Radhakrishnan for helping me with this.

The problem was my NIC: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI
Express Gigabit Ethernet controller (rev 01)

What happens, is that the NIC''s driver sets the HWADRRESS =
FE:FF:FF:FF:FF:FF, and that''s the same address used in xenbr0

What you need to do, is set the address manually. in Centos you can do this by
setting /etc/sysconfig/network-scripts/ifcfg-eth0

you need to set MACADDR=00:00:de:50:f1:45 (just an example)

be sure you set MACADDR and not HWADDR




and that''s it !!!!  thanks, to everyone... now i can continue my
virtualization process...




>Hi, I''m trying to install xen with this configuration:
>
>   dom0 -> Centos 5.3 
>    dom1 -> Fedora 10
>    dom2 -> Fedora 10
>
>    Centos kernel = (2.6.18-128.1.10.el5.centos.plusxen)
>    XEN Version =   3.0.3
>
>
> I''m
having some problems trying to install xen on my mychine, but i''ve been
able to solve all of them but one: i can''t reach my gateway from
dom0.
>
> With the normal kernel i CAN ping the gateway, but when i switch to
kernel-xen i CAN''T.
>
> - I''m using the default xen configuration, with only 1 NIC. I
haven''t modified any script.
>
> - I have these interfaces: eth0, lo, peth0, vif0.0, virbr0, xenbr0
>
>- My Eth0: (I set this manually with ''setup'' command)
>
>                Address - 192.168.2.8 
>                Mask - 255.255.255.0
 >               Gateway - 192.168.2.1 (I can´t ping
here)
>
>- Also, I''m getting this message
>
>  "vif0.0: received packet with own address as source address"
>
>- route -n
>
>   Destination         Gateway         Genmask             Flags  Metric  
Ref   Use   Iface
>   192.168.2.0         0.0.0.0           255.255.255.0       U       0      
0      0      eth0
>   192.168.122.0      0.0.0.0           255.255.255.0       U       0       
0       0      virbr0
>   169.254.0.0         0.0.0.0           255.255.255.0       U       0      
0      0       eth0
>   0.0.0.0                192.168.2.1     0.0.0.0                UG     0   
0     0       eth0
>
>
> i''ve been troubleshooting this for several days, but i''m
about to give up...
>
> i will appreciate any help... 
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from:
http://www.centos.org/modules/newbb/print.php?form=1&topic_id=19489&forum=40&order=ASC&start=0

"I just found out that there is setting in the BIOS which is Realtek LAN
Boot ROM. It is not enabled and therefore the MAC address is kept on
overwritten. After setting it to enabled, I got my real MAC address back and
xen works as per normal."

Confirmed the above, and networking working again as normal.

/mark
2.6.18-128.el5xen

----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 27 May 2009 16:53:27 +0000
> From: "Jk ." <jankarlitos@hotmail.com>
> Subject: [Xen-users] Can''t ping gateway (SOLVED !!!!)
> To: <xen-users@lists.xensource.com>
> Message-ID: <COL107-W1E891CCBF89E84CEB0FC6BF530@phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
> HI again,
>
> This is the solution to my problem, hope it helps someone in the future.
>
> First of all, thanks to Ramachandran Radhakrishnan for helping me with
> this.
>
> The problem was my NIC: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI
> Express Gigabit Ethernet controller (rev 01)
>
> What happens, is that the NIC''s driver sets the HWADRRESS >
FE:FF:FF:FF:FF:FF, and that''s the same address used in xenbr0
>
> What you need to do, is set the address manually. in Centos you can do this
> by setting /etc/sysconfig/network-scripts/ifcfg-eth0
>
> you need to set MACADDR=00:00:de:50:f1:45 (just an example)
>
> be sure you set MACADDR and not HWADDR
>
>
>
>
> and that''s it !!!!  thanks, to everyone... now i can continue my
> virtualization process...
>
>
>

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