# settings > This menu allows you to configure various IPv6-related kernel and system-wide network parameters. These settings control how the operating system handles IP traffic and network communications. ----------- ## ipv6/settings **Type:** Settings Directory This menu allows you to configure various IPv6-related kernel and system-wide network parameters. These settings control how the operating system handles IP traffic and network communications. :::note Changing IPv6 settings does not dynamically remove an existing SLAAC configuration, a router reboot is required. ::: Disable or enable IPv6 system-wide. When disabled, prevents link-local address generation. Enable or disable packet forwarding between interfaces. Specify the IPv6 hash policy for [ECMP](../../user-guides/routing-and-networking-protocols/routing-decision.md#multipath-ecmp-routes) routing: - l3 - Layer-3 hashing of source IP, destination IP, flow label, and IP protocol. - l3-inner - Layer-3 hashing or inner layer-3 hashing if available. - l4 - Layer-4 hashing of source IP, destination IP, IP protocol, source port, and destination port. Accept or reject ICMP redirect messages. Enable on hosts and disable on routers. Control acceptance of router advertisement (RA) messages. When enabled, the router obtains addresses using [stateless address configuration](../../system-information-and-utilities/neighbor-discovery.md). Specify which interfaces to listen for incoming router advertisements (RAs). Disable automatic link-local address generation for non-VPN interfaces. Use this when you need manually configured link-local addresses. Set the interval at which the system checks stale IPv6 neighbor entries and probes them to verify reachability. Timeout duration after which stale IPv6 neighbor entries are purged. Set the minimum number of IPv6 neighbor entries for which the device must allocate memory. Set the expected maximum number of IPv6 neighbor entries the system should handle. Set the maximum number of IPv6 neighbor entries. As of RouterOS version 7.1, the default value depends on installed RAM: - 1024 for 64 MiB - 2048 for 128 MiB - 4096 for 256 MiB - 8192 for 512 MiB - 16384 for 1024 MiB or higher Setting a value higher than the default increases the risk of out-of-memory conditions. Enable [Fast Path](../../firewall-and-quality-of-service/packet-flow-in-routeros#fast-path) for IPv6 traffic. Fasttrack and fastpath values are cumulative since the feature was last enabled or since the system restarted. Indicates whether the IPv6 fast path feature is currently active. Total number of packets that have been processed through the IPv6 fast path. Total number of bytes that have been processed through the IPv6 fast path. Indicates whether the IPv6 fasttrack feature is currently active. Total number of packets that have been processed through IPv6 fasttrack. Total number of bytes that have been processed through IPv6 fasttrack.