Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2013-01-04 Thread Gavin Henry
Couldn't get this to work so had to disable it. On 26 December 2012 19:47, Gavin Henry gavin.he...@gmail.com wrote: First things first... Can you confirm that those are still the values in place? cat /proc/sys/net/ipv4/conf/eth0/arp_filter cat /proc/sys/net/ipv4/conf/eth0/arp_ignore cat

[CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gavin Henry
Dear all, Has anyone experienced this whilst running DRBD over eth1 between two CentOS 5.7 servers? eth1 is a private IP address, unroutable. eth0 is the public address. CentOS will reply sometimes once every 3 days or every 14mins~ saying My public IP is on eth1 to arp requests when it's not,

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Mike Burger
-- Mike Burger http://www.bubbanfriends.org It's always suicide-mission this, save-the-planet that. No one ever just stops by to say 'hi' anymore. --Colonel Jack O'Neill, SG1 Dear all, Has anyone experienced this whilst running DRBD over eth1 between two CentOS 5.7 servers? eth1 is a

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gordon Messmer
On 12/26/2012 02:06 AM, Gavin Henry wrote: # For the dual interface - 06.12.12 net.ipv4.conf.eth0.arp_filter = 1 net.ipv4.conf.eth0.arp_ignore = 1 net.ipv4.conf.eth1.arp_filter = 1 net.ipv4.conf.eth1.arp_ignore = 1 net.ipv4.conf.all.arp_filter = 1 First things first... Can you confirm that

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gordon Messmer
On 12/26/2012 04:33 AM, Mike Burger wrote: 169.xxx.xxx.xxx is most certainly a routable IP block, as far as internet standards go. Most of 169/8 is, but presumably he meant 169.254.0.0/16. The only non-routable (i.e. reserved for private networks) IP blocks are: The list is slightly longer

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Mike Burger
On 12/26/2012 04:33 AM, Mike Burger wrote: 169.xxx.xxx.xxx is most certainly a routable IP block, as far as internet standards go. Most of 169/8 is, but presumably he meant 169.254.0.0/16. The only non-routable (i.e. reserved for private networks) IP blocks are: The list is slightly

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread SilverTip257
On Wed, Dec 26, 2012 at 12:25 PM, Mike Burger mbur...@bubbanfriends.orgwrote: On 12/26/2012 04:33 AM, Mike Burger wrote: 169.xxx.xxx.xxx is most certainly a routable IP block, as far as internet standards go. Most of 169/8 is, but presumably he meant 169.254.0.0/16. The only

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gavin Henry
We're having to shut eth1 down and bring it up for sync at night. To what type of equipment are your ethernet devices connected? I'm asking now. Are they both connected to the same device? Same VLAN, not sure about same device yet. Checking. I've seen some devices (particularly 2Wire)

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gavin Henry
Most of 169/8 is, but presumably he meant 169.254.0.0/16. The only non-routable (i.e. reserved for private networks) IP blocks are: The list is slightly longer than that: http://en.wikipedia.org/wiki/Reserved_IP_addresses#Reserved_IPv4_addresses No, Mike was right. 169.x.x.x which is wrong,

Re: [CentOS] CentOS 5.7 eth0, eth1 and arpwatch flip flops

2012-12-26 Thread Gavin Henry
First things first... Can you confirm that those are still the values in place? cat /proc/sys/net/ipv4/conf/eth0/arp_filter cat /proc/sys/net/ipv4/conf/eth0/arp_ignore cat /proc/sys/net/ipv4/conf/eth1/arp_filter cat /proc/sys/net/ipv4/conf/eth1/arp_ignore cat