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Re: [Xen-users] Re: Dom0 network restart required

On Wed, Dec 16, 2009 at 5:26 AM, Tanuj Bansal <bansal.tanuj83@xxxxxxxxx> wrote:
> 1. it is using static IP
> 2. we use routing to reach the server.

> xenbr3          8000.feffffffffff       no              vif4.1
>                                                         vif3.1
>                                                         peth3
>                                                         vif0.3

Do you know the difference between routing and bridged setup? From
that output it looks like you're using bridged setup.

> when I use arping -b -I eth0 gateway  on dom0, server became accesible.

Then it's just like I said:
>> However my guess is your switch/router/gateway simply don't cache your
>> dom0's arp entry.

> so where may be issue, network team says no issue there side.

When it comes to arp issue, they usually say that :D
Some alternatives:
- try to find out why your gateway/switches can't find your dom0 arp
entry. This can be ... complicated.
- put static arp entry on your gateway. This works, but not really
recommended, plus your network guys may not allow such setup
- setup dom0 to periodically send outgoing packets. A simple ping to
gateway in crontab should be enough. This will ensure that network
devices will keep up to date entry of dom0's MAC address.


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