[CentOS] CentOS 6 - VM network bridge issue (SOLVED)

Emmett Culley emmett at webengineer.com
Wed Jul 20 14:23:44 UTC 2011

On 07/20/2011 01:24 AM, James Hogarth wrote:
>>> Initial thought is a routing issue particularly with multiple NICs.
>>> What does 'ip r s' reveal?
>> That was it!  ip r s showed that I had the local facing NIC (eth1) as the gateway, which caused all outgoing packets to be routed to the local network DUH!.
> Yup been there before.....
> So long as the local NIC doesn't need to hit any other internal
> subnets you'll be fine... otherwise don't forget to add the
> appropriate RFC1918 static routes to go out that interface with the
> default being the external one....
> Also another thing to watch out for is asymmetric routing. If it is
> possible to get to a destination via either interface and due to
> routing issues elsewhere the packet does not return to the same
> interface through the same gateway you can get odd behaviour.... In
> which case you would need to set up policy routing rules to ensure
> stuff enters/leaves the right way... but dont' worry about that for
> now - just remember it for later if you get odd network behaviour....
Thanks James,

I keep it in mind, but by the time it happens I'll need Google again to find this thread :-)

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