Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-13 Thread Gordon Messmer
On 02/10/2012 05:54 AM, Bob Hoffman wrote: Yea, I gave up on bonding, ended up just using eth1. But every tutorial I found had added eth0 and eth1 as interfaces to br0, thus sharing the bridge so to speak. Those tutorials were documenting the manner in which you can set up a transparent Linux

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Tony Mountifield
In article 4f345cd3.4060...@bobhoffman.com, Bob Hoffman b...@bobhoffman.com wrote: so I gave up on bonding. I found about 300 posts showing eth0 and eth1 both pointing to br0 (bridge) as interfaces. I followed them correctly, or so I thought. I pointed both ethx to the bridge, restarted

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Dennis Jacobfeuerborn
On 02/10/2012 12:54 AM, Bob Hoffman wrote: so I gave up on bonding. I found about 300 posts showing eth0 and eth1 both pointing to br0 (bridge) as interfaces. I followed them correctly, or so I thought. I pointed both ethx to the bridge, restarted network and bam...!!! Bonding and bridging

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Dennis Jacobfeuerborn
On 02/10/2012 11:18 AM, Tony Mountifield wrote: In article4f345cd3.4060...@bobhoffman.com, Bob Hoffmanb...@bobhoffman.com wrote: so I gave up on bonding. I found about 300 posts showing eth0 and eth1 both pointing to br0 (bridge) as interfaces. I followed them correctly, or so I thought. I

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Bob Hoffman
- Dennis Jacobfeuerborn wrote /Fri Feb 10 06:47:22 EST 2012/ On 02/10/2012 12:54 AM, Bob Hoffman wrote: / so I gave up on bonding. // I found about 300 posts showing eth0 and eth1 both pointing to br0 (bridge) // as interfaces. // I

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Janez Kosmrlj
i have several centos 5.x servers with bonding enabled. And none of them have any problems. I used this tutorial: http://www.howtoforge.com/network_card_bonding_centos I use mode=6. On Fri, Feb 10, 2012 at 2:54 PM, Bob Hoffman b...@bobhoffman.com wrote:

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread m . roth
Bob Hoffman wrote: Dennis Jacobfeuerborn wrote /Fri Feb 10 06:47:22 EST 2012/ On 02/10/2012 12:54 AM, Bob Hoffman wrote: / so I gave up on bonding. // I found about 300 posts showing eth0 and eth1 both pointing to br0 (bridge) // as interfaces. // I followed them correctly, or so I

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Dennis Jacobfeuerborn
On 02/10/2012 02:54 PM, Bob Hoffman wrote: - Dennis Jacobfeuerborn wrote /Fri Feb 10 06:47:22 EST 2012/ On 02/10/2012 12:54 AM, Bob Hoffman wrote: / so I gave up on bonding. // I found about 300 posts showing eth0 and eth1 both

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Bob Hoffman
/ = Dennis Jacobfeuerborn wrote // Yea, I gave up on bonding, ended up just using eth1. But every tutorial // I found had added eth0 and eth1 as interfaces to br0, thus sharing the // bridge so to speak. // All the tutorials were for debian though, all the

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Dennis Jacobfeuerborn
On 02/10/2012 04:25 PM, Bob Hoffman wrote: / = Dennis Jacobfeuerborn wrote // Yea, I gave up on bonding, ended up just using eth1. But every tutorial // I found had added eth0 and eth1 as interfaces to br0, thus sharing the // bridge so to speak. // All

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Bob Hoffman
/ = // Dennis Jacobfeuerborn wrote// // Nothing at all to do with bonding. Not at all. // eth1 to br0 , eth0 to br0that's all. // If that is possible, I see no reason for a bond at all. // I just want to make sure if an NIC fails, the other one is still

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Devin Reade
Bob, I'd suggest you do some more reading on the purpose behind bonding and bridging. It *sounds* like what you functionally need is to have a server with a single route upstream, not acting as a gateway, but where you want to be able to take a failure on one of the upstream network connections

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Les Mikesell
On Fri, Feb 10, 2012 at 9:25 AM, Bob Hoffman b...@bobhoffman.com wrote: Nothing at all to do with bonding. Not at all. eth1 to br0 , eth0 to br0that's all. If that is possible, I see no reason for a bond at all. I just want to make sure if an NIC fails, the other one is still working

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Lamar Owen
On Feb 9, 2012, at 6:54 PM, Bob Hoffman wrote: entire ip block went out. when I called datacenter they told me the router was under attack and I was like 'uh oh' and told them to just shut off my computer I would be there to fix it. They did not believe me. An hour later I was there and

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Devin Reade
--On Friday, February 10, 2012 01:49:05 PM -0600 Les Mikesell lesmikes...@gmail.com wrote: I suppose it is possible for a NIC to fail, but I can't recall actually ever seeing it. I've seen lots of complicated failover schemes introduce new problems and their own failure modes [...] +1.

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread m . roth
Devin Reade wrote: snip I do have clusters where bonding is in use but those have helped not so much in avoiding NIC failures as they do in allowing the machines to continue operating as the network team brings down part of the redundant switch network for maintenance (or to replace a failed

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Devin Reade
--On Friday, February 10, 2012 04:40:59 PM -0500 m.r...@5-cent.us wrote: Devin Reade wrote: snip or when some fool decides that they can unplug a network cable briefly so that they can move other cables around). Now wait a minute - I would dearly love to disconnect some cables we have in

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread Les Mikesell
On Fri, Feb 10, 2012 at 3:40 PM, m.r...@5-cent.us wrote: Devin Reade wrote: snip I do have clusters where bonding is in use but those have helped not so much in avoiding NIC failures as they do in allowing the machines to continue operating as the network team brings down part of the

Re: [CentOS] oops, or how to bring a datacenter router down with one setting

2012-02-10 Thread m . roth
Devin Reade wrote: --On Friday, February 10, 2012 04:40:59 PM -0500 m.r...@5-cent.us wrote: Devin Reade wrote: snip or when some fool decides that they can unplug a network cable briefly so that they can move other cables around). Now wait a minute - I would dearly love to disconnect some