- Network > Virtual Routers > Router Settings > ECMP
Use the following fields to configure Equal-Cost Multiple Path settings.
Enabling, disabling, or changing ECMP requires that you restart the firewall, which might cause sessions to be terminated.
(Optional) Select Symmetric Return to cause return packets to egress out the same interface on which the associated ingress packets arrived. That is, the firewall will use the ingress interface on which to send return packets, rather than use the ECMP interface, so the Symmetric Return setting overrides load balancing. This behavior occurs only for traffic flows from the server to the client.
Select the maximum number of equal-cost paths: (2, 3, or 4) to a destination network that can be copied from the RIB to the FIB. Default is 2.
Choose one of the following ECMP load-balancing algorithms to use on the virtual router. ECMP load balancing is done at the session level, not at the packet level. This means that the firewall (ECMP) chooses an equal-cost path at the start of a new session, not each time a packet is received.
Configure ECMP on a Virtual Router
Configure ECMP on a Virtual Router Use the following procedure to enable ECMP on a virtual router. The prerequisites are to: Specify the interfaces that ...
ECMP Load-Balancing Algorithms
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ECMP Network > Virtual Routers > Router Settings > ECMP Equal Cost Multiple Path (ECMP) processing is a networking feature that enables the firewall to ...
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ECMP in Active/Active HA Mode
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Enable ECMP for Multiple BGP Autonomous Systems
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Egress Path and Symmetric Return
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Virtual Routers The firewall uses virtual routers to obtain routes to other subnets by you manually defining static routes or through participation in one or ...