Fortinet cli failover

fortinet cli failover

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Using diagnose sys ha set-as-master enable command on an unit will make it the primary unit until it is rebooted. Fortinet Community. Help Sign In. Fortinet Forum. The Forums are a place to find answers on a range of Fortinet products from peers and product experts. Triggering an HA failover? Specifically, how does one go about trigger a failback to the cluster member with the highest weight? All forum topics Previous Topic Next Topic. Thanks for your reply, Austin.

What do you mean " shut down the monitored interface from the CLI"? Do you mean the heartbeat interface? The diag command will simply eliminate the age of the cluster members as a criterion for choosing the primary unit. To shut down an interface via CLI would mean to put it ' administratively down'. If you' re in a test environment that might work. Pulling the cable is quicker though. Ede "Kernel panic: Aiee, killing interrupt handler! Thanks Ede. I am not in a test environment. Therefore, I will simply use diag sys ha reset-uptime.

Thanks Selective. However, all sessions inside the SSL VPN tunnel that were running before the failover are stopped and have to be restarted. For example, file transfers that were in progress would have to be restarted. So the cluster does not specifically support failover of these packets.

Some UDP traffic can continue to flow through the cluster after a failover. This can happen if, after the failover, a UDP packet that is part of an already established communication stream matches a security policy. Then a new session will be created and traffic will flow.

So after a short interruption, UDP sessions can appear to have failed over. However, this may not be reliable for the following reasons:. The limitation on packets continuing to flow is that there has to be a security policy to accept the packets. For example, if the FortiOS Carrier unit has an internal to external security policy, GTP UDP sessions using an established tunnel that are received by the internal interface are accepted by the security policy and can continue to flow.

However, GTP UDP packets for an established tunnel that are received at the external interface cannot flow until packets from the same tunnel are received at the internal interface. If you have bi-directional policies that accept GTP UDP sessions then traffic in either direction that uses an established tunnel can continue to flow after a failover without interruption.

A c t i ve — ac t i v e HA subordinate units sessions can resume after a failover. In an active-active cluster, subordinate units process sessions. After a failover, all cluster units that are still operating may be able to continue processing the sessions that they were processing before the failover. These sessions are maintained because after the failover the new primary unit uses the HA session table to continue to send session packets to the cluster units that were processing the sessions before the failover.

Cluster units maintain their own information about the sessions that they are processing and this information is not affected by the failover. In this way, the cluster units that are still operating can continue processing their own sessions without loss of data.

The cluster keeps processing as many sessions as it can. But some sessions can be lost. Depending on what caused the failover, sessions can be lost in the following ways:. Save my name, email, and website in this browser for the next time I comment.

Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed. From the CLI enter: config system ha set session-pickup enable end To support session failover, when E n a b l e Session Pick-up is selected, the FGCP maintains an HA session table for most TCP communication sessions being processed by the cluster and synchronizes this session table with all cluster units.

If session pickup is enabled, you can use the following command to also enable UDP and ICMP session failover: config system ha set session-pickup-connectionless enable end You must enable session pickup for session failover protection. Some sessions may resume after a failover whether or not enable session pick-up is selected: UDP, ICMP, multicast and broadcast packet session failover on page FortiOS Carrier GTP session failover on page Active-active HA subordinate units sessions can resume after a failover on page Im p r o v i n g session synchronization performance Two HA configuration options are available to reduce the performance impact of enabling session pickup.

R e du c i n g the number of sessions that are synchronized Enable the session-pickup-delay CLI option to reduce the number of sessions that are synchronized by synchronizing sessions only if they remain active for more than 30 seconds. Use the following command to enable a 30 second session pickup delay: config system ha set session-pickup-delay enable end Enabling session pickup delay means that if a failover occurs more sessions may not be resumed after a failover.

U s i n g multiple FortiGate interfaces for session synchronization Using the session-sync-dev option you can select one or more FortiGate interfaces to use for synchronizing sessions as required for session pickup. S ess i o n failover not supported for all sessions Most of the features applied to sessions by FortiGate security profile functionality require the FortiGate unit to maintain very large amounts of internal state information for each session.

See Active-active HA subordinate units sessions can resume after a failover on page for details. TCP sessions for a protocol for which security profile features have not been enabled resume after a failover even if they are accepted by a security policy with security profile features enabled.

For example, if you have not enabled any antivirus or content archiving settings for FTP, FTP sessions resume after a failover. Sessions being scanned by IPS resume after a failover. After a failover; however, IPS can only perform packet-based inspection of resumed sessions; reducing the number of vulnerabilities that IPS can detect.

This limitation only applies to in-progress resumed sessions. Application control does not affect session failover. Sessions that are being monitored by application control resume after a failover. Logging enabled form security profile features does not affect session failover. Logging does not enable features that would prevent sessions from being failed over, logging just reports on the activities of enabled features.

For example: Sessions being scanned by IPS and also being virus scanned do not resume after a failover. Sessions that are being monitored by application control and that are being DLP archived or virus scanned will not resume after a failover. However, this may not be reliable for the following reasons: UDP packets in the direction of the security policy must be received before reply packets can be accepted. So, if a user connects from an internal network to the Internet and starts receiving UDP packets from the Internet for example streaming media , after a failover the user will not receive any more UDP packets until the user re-connects to the Internet site.

So only traffic for UDP protocols that can handle the source port changing during a session will continue to flow. A c t i ve — ac t i v e HA subordinate units sessions can resume after a failover In an active-active cluster, subordinate units process sessions. Depending on what caused the failover, sessions can be lost in the following ways: A cluster unit fails the primary unit or a subordinate unit.

All sessions that were being processed by that cluster unit are lost. A link failure occurs. All sessions that were being processed through the network interface that failed are lost. This mechanism for continuing sessions is not the same as session failover because: Only the sessions that can be maintained are maintained.

The sessions are maintained on the same cluster units and not re-distributed. Sessions that cannot be maintained are lost. Mike Posts. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's.

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