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 Lin

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: >> >>> 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 disc

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, wrote: > Devin Reade wrote: > > > 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 swi

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: > >> 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

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

2012-02-10 Thread m . roth
Devin Reade wrote: > 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 sw

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 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. Redundancy is cool. Re

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 dele

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 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 > while I am aslee

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 w

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 st

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.

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 c

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

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,

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 wrote: > >

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 Dennis Jacobfeuerborn
On 02/10/2012 11:18 AM, Tony Mountifield wrote: > In article<4f345cd3.4060...@bobhoffman.com>, > 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 point

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 bridgi

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 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...

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

2012-02-09 Thread Bob Hoffman
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...!!! entire ip block went out. when I called datacenter they told me the ro