[CentOS] ethernet outages C5.4

[JohnS]

On Fri, 2010-05-14 at 12:39 -0700, Dave Stevens wrote:
> Hello All,
> 
> I don't have any reason to believe CENTOS (5.4) is underlying my  
> difficulties but it's what I've got to work with so here's the setup:
> 
> I have a 2P motherboard with 2 Opteron 2376s and two ethernet ports.  
> The setup is fully virtualized, with Dom0, dom4 and Dom1 up and  
> running. dom4 is attached to a dhcp service on eth0 and has no problems.
> 
> I've recently connected dom1 to eth1. eth1 is connected to a dsl modem  
> (no router) and to the ISP's dsl signal It has a static IP address,  
> 204.174.35.205. At intervals of a few hours the dom1 service on eth1  
> became inaccessible, not responding for either web or ssh access. eth0  
> on another provider's network remains up at this time. I can fix the  
> availability issue by ssh'ing to the eth0 side, then ssh from there to  
> dom1 (at 192.168.0.117) and then from the inside out ping any external  
> address, it doesn't seem to matter which one. Then the connections get  
> through and all is well for a while.
> 
> I have a workaround in place with this command:
> 
> watch -n 60 ping -c 1 uniserve.com

Effectively your telling it to KeepAlive.
Is the router/modem going to sleep?
Preston seems to think like me also I just read his reply to you.


John