Juniper ssg5 ha setup

Notify me of follow-up comments by email. Notify me of new posts by email. This is one of many VPN tutorials on my blog. NPU acceleration: encryption outbound decryption inbound. XAUTH status: 0. DPD seq local , peer DF bit: clear.

DSCP-mark : disabled. Leave a Reply Cancel reply Your email address will not be published. Leave this field empty.

This cookie contains no personal data and is discarded when you close your browser. When you log in, we will also set up several cookies to save your login information and your screen display choices. Cookies may be used to display advertisements or to collect statistics about the use of the Corelan website. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. If you disable this cookie, we will not be able to save your preferences.

This means that every time you visit this website you will need to enable or disable cookies again. You do not have to accept cookies to be able to use the publicly accessible parts of the Corelan Website. We may use third party cookies to show ads and to collect anonymous information such as the number of visitors to the site, and the most popular pages.

The ability to show ads is an important source of income to cover the hosting fees to keep this website alive. If you prevent ads from being displayed, this website will eventually disappear. Corelan Cybersecurity Research :: Knowledge is not an object, it's a flow Please follow us on Facebook corelanconsulting and Twitter corelanconsult. Free tool : Find out where your AD Users are logged on into ».

Use the same interface number on both devices. It makes no real sense to build a cluster if your switches are not redundant as well. Having a cluster on one switch will bring some redundancy, but the switch becomes a single point of failure. Just something to keep in mind. License : SSG5 devices require an additional license. If you set up a cluster, both devices run the same VSD. This means that they have the same configuration. To end users, traffic always uses the VSD, not one or another physical device.

This device monitors the state of the master and takes over when the master fails Initial : state of a VSD group member when it is being joined to the VSD group Ineligible : state assigned by an admin so it cannot particiate in the election process more info about this process later Inoperable : state of a member that cannot be joinged to the VSD because there is an internal problem or network connection problem.

If two devices have the same priority, the device that has the lowest mac address will win. But there may be a reason where you want to control the election.

The backup device takes control. Suppose the master device is broken and you need to replace it and the replacement unit has a lower mac address. So you reconfigure the new device with the same VSD information, same priority. You connect the master device back and all of a sudden both devices have an empty config. When you put the master device back, with the same priority, and a lower MAC, it will become master again… But it does not have the config yet.

So it pushes its empty config to the other device and the entire cluster is broken. This scenario can be avoided by setting different priorities, or by manually setting the node that has the entire config to preempt mode.

This will ensure that this node with preempt enabled will become the master even if the other node has a lower priority. So in the scenario where the previous master broke down and was replaced, I would put the active node the backup node at that point in preempt and then reconnect the new node into the cluster. The preempt holddown parameter specifies how long a device will wait for another device with higher priority to assume the master role before it takes over.

The default is 3 seconds. You can control how many ARP packets are sent upon failover. When in this state the VSD can either be prompted to master due to the old VSD disappearing or goes into an inoperable state. Inoperable — The VSD will go into this state if it detects a failure that stops it from passing traffic, when in this state the VSD isnt included in elections. Ineligible — This is an administratively down state of a VSD, of which is done manually.

Such as a router IP. This allows for failovers in the event of a Netscreen interface or switch port failing. If in the event of failure you required your traffic to take an alternative route, a configuration option would be to,. To enable RTO use the following commands,. With some insecure protocols you may wish to disable sessions created by a certain policy from being mirrored when dealing with DoS attacks.

To change this,. Split Brain is a situation where the HA link fails and in turn both devices believe the other device has failed and then promotes itself to master.