Hello, I've got a 3240 HA pair running 7.3.5. We are looking to enable cluster failover for network interface failures. I want to test this with 7.3.5 line of the simulator.
I can create a HA cluster with the simulator. The problem is that both nodes of the sim use the same interface on the underlying OS. I would like node1 of the sim to use eth1 and node2 of the sim to use eth2. That way I can simulate a network failure of just one of the nodes of the sim. I have not found a way to achieve this yet.
I tried creating 2 separate sim nodes (without clustering) on different interfaces, but after they are both up, the cluster interconnect is missing -- so enabling cf does nothing.
Any ideas on how I can do this with the sim?
I tried just doing an "ifconfig ns0 down" on one of the nodes of the cluster-- that disconnected the network from that node, but it didn't trigger the cluster failover, so I'm guessing that an ifdown is not the same as a nic failure (at least as far as triggering a takeover is concerned).
Thanks. Paul
With your current ifconfig down test, is “options cf.takeover.on_network_interface_failure” set applicably?
--Jordan
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Paul Letta Sent: Wednesday, September 11, 2013 10:19 AM To: toasters Subject: NetApp Simulator - Using different interfaces for each node of cluster?
Hello, I've got a 3240 HA pair running 7.3.5. We are looking to enable cluster failover for network interface failures. I want to test this with 7.3.5 line of the simulator.
I can create a HA cluster with the simulator. The problem is that both nodes of the sim use the same interface on the underlying OS. I would like node1 of the sim to use eth1 and node2 of the sim to use eth2. That way I can simulate a network failure of just one of the nodes of the sim. I have not found a way to achieve this yet.
I tried creating 2 separate sim nodes (without clustering) on different interfaces, but after they are both up, the cluster interconnect is missing -- so enabling cf does nothing.
Any ideas on how I can do this with the sim?
I tried just doing an "ifconfig ns0 down" on one of the nodes of the cluster-- that disconnected the network from that node, but it didn't trigger the cluster failover, so I'm guessing that an ifdown is not the same as a nic failure (at least as far as triggering a takeover is concerned).
Thanks. Paul
Hi Paul,
I may be mis-remembering, but don't you need to add "nfo" to the ifconfig lines in your rc file, so that OnTap knows to kick off a fail over if that particular interface fails?
On Sep 11, 2013, at 10:18 AM, Paul Letta letta@jlab.org wrote:
Hello, I've got a 3240 HA pair running 7.3.5. We are looking to enable cluster failover for network interface failures. I want to test this with 7.3.5 line of the simulator.
I can create a HA cluster with the simulator. The problem is that both nodes of the sim use the same interface on the underlying OS. I would like node1 of the sim to use eth1 and node2 of the sim to use eth2. That way I can simulate a network failure of just one of the nodes of the sim. I have not found a way to achieve this yet.
I tried creating 2 separate sim nodes (without clustering) on different interfaces, but after they are both up, the cluster interconnect is missing -- so enabling cf does nothing.
Any ideas on how I can do this with the sim?
I tried just doing an "ifconfig ns0 down" on one of the nodes of the cluster-- that disconnected the network from that node, but it didn't trigger the cluster failover, so I'm guessing that an ifdown is not the same as a nic failure (at least as far as triggering a takeover is concerned).
Thanks. Paul
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Sorry.. I should have provided that info,
I did set the interfaces to nfo and set:
options cf.takeover.on_network_interface_failure.policy any_nic
options cf.takeover.on_network_interface_failure on
For those of you that use these setting on real H/W.. does a "ifconfig down" trigger the failover? Or does the interface have to actually fail or be unplugged?
Thanks. Paul
-------
I may be mis-remembering, but don't you need to add "nfo" to the ifconfig lines in your rc file, so that OnTap knows to kick off a fail over if that particular interface fails?
--------
With your current ifconfig down test, is “options cf.takeover.on_network_interface_failure” set applicably?
Actually, sounds like no.
If we can believe this thread, administratively downing the interface in the sim will not work.
https://communities.netapp.com/thread/1734
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Paul Letta Sent: Wednesday, September 11, 2013 10:46 AM To: toasters Subject: Re: NetApp Simulator - Using different interfaces for each node of cluster?
Sorry.. I should have provided that info,
I did set the interfaces to nfo and set:
options cf.takeover.on_network_interface_failure.policy any_nic
options cf.takeover.on_network_interface_failure on
For those of you that use these setting on real H/W.. does a "ifconfig down" trigger the failover? Or does the interface have to actually fail or be unplugged?
Thanks. Paul
-------
I may be mis-remembering, but don't you need to add "nfo" to the ifconfig lines in your rc file, so that OnTap knows to kick off a fail over if that particular interface fails?
--------
With your current ifconfig down test, is “options cf.takeover.on_network_interface_failure” set applicably?
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Jordan Slingerland -
Paul Letta -
Scott Eno