Review sysctl settings #829
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troglobit
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These changes are based on the sysctl recommendations by Frr [1]. Not all recommendations have been incorporated, e.g., ip forwarding is not enabled per interface, because in Infix this is an opt-in feature. A readme.txt has been added, documenting the various settings. New for IPv4: - Adjust IGMP max memberships: 20 -> 1000 - Use neighbor information on nexthop selection - Use inbound interface address on ICMP errors - Ignore routes with link down - Disable rp_filter ARP settings have been changed to better fit routers, i.e., systems with multiple interfaces: - Always use best local address when sending ARP - Only reply to ARP if target IP is on the inbound interface - Generate ARP requests when device is brought up or HW address changes New for IPv6: - Keep static global addresses on link down - Ignore routes with link down Fixes #829 [1]: https://github.com/FRRouting/frr/blob/master/doc/user/Useful_Sysctl_Settings.md Signed-off-by: Joachim Wiberg <[email protected]>
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troglobit
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Dec 3, 2024
These changes are based on the sysctl recommendations by Frr [1]. Not all recommendations have been incorporated, e.g., ip forwarding is not enabled per interface, because in Infix this is an opt-in feature. A readme.txt has been added, documenting the various settings. New for IPv4: - Adjust IGMP max memberships: 20 -> 1000 - Use neighbor information on nexthop selection - Use inbound interface address on ICMP errors - Ignore routes with link down - Disable rp_filter ARP settings have been changed to better fit routers, i.e., systems with multiple interfaces: - Always use best local address when sending ARP - Only reply to ARP if target IP is on the inbound interface - Generate ARP requests when device is brought up or HW address changes New for IPv6: - Keep static global addresses on link down - Ignore routes with link down Fixes #829 [1]: https://github.com/FRRouting/frr/blob/master/doc/user/Useful_Sysctl_Settings.md Signed-off-by: Joachim Wiberg <[email protected]>
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mDNS currently runs on all layer-3 interfaces when enabled. The Styx board has 28 ports, with many set up as L3 interfaces we get the following error:
This is caused by the Linux sysctl
net.ipv4.igmp_max_membershipsdefault limit of 20.While researching the topic the following links popped up:
sysctl.confhttps://gist.github.com/ericpulvino/48405354a6d417a1375b49d4f4545408sysctl.confrecommendations for routing: https://github.com/FRRouting/frr/blob/master/doc/user/Useful_Sysctl_Settings.mdMost of the changes are very relevant also for Infix. We need to investigate and update at least
net.ipv4.igmp_max_memberships.The text was updated successfully, but these errors were encountered: