projects / mirror_frr.git / blame
| Commit | Line | Data |
|---|---|---|
| 1ec46976 EP |
1 | # Useful Sysctl Settings |
| 2 | Sysctl on Linux systems can tweak many useful behaviors. When it comes to a routing protocol suite like FRRouting there are numerous values depending on your use case that make sense to optimize. | |
| 3 | ||
| 4 | The below sysctl values provide a logical set of defaults which can be further optimized. | |
| 5 | ||
| 6 | ||
| 7 | ``` | |
| 8 | # /etc/sysctl.d/99frr_defaults.conf | |
| 9 | # Place this file at the location above and reload the device. | |
| 10 | # or run the sysctl -p /etc/sysctl.d/99frr_defaults.conf | |
| 11 | ||
| 12 | # Enables IPv4/IPv6 Routing | |
| 13 | net.ipv4.ip_forward = 1 | |
| 14 | net.ipv6.conf.all.forwarding=1 | |
| 15 | ||
| 16 | # Routing | |
| 17 | net.ipv6.route.max_size=131072 | |
| 18 | net.ipv4.conf.all.ignore_routes_with_linkdown=1 | |
| 19 | net.ipv6.conf.all.ignore_routes_with_linkdown=1 | |
| 20 | ||
| 21 | # Best Settings for Peering w/ BGP Unnumbered | |
| 22 | # and OSPF Neighbors | |
| 23 | net.ipv4.conf.all.rp_filter = 0 | |
| 24 | net.ipv4.conf.default.rp_filter = 0 | |
| 25 | net.ipv4.conf.lo.rp_filter = 0 | |
| 26 | net.ipv4.conf.all.forwarding = 1 | |
| 27 | net.ipv4.conf.default.forwarding = 1 | |
| 28 | net.ipv4.conf.default.arp_announce = 2 | |
| 29 | net.ipv4.conf.default.arp_notify = 1 | |
| 30 | net.ipv4.conf.default.arp_ignore=1 | |
| 31 | net.ipv4.conf.all.arp_announce = 2 | |
| 32 | net.ipv4.conf.all.arp_notify = 1 | |
| 33 | net.ipv4.conf.all.arp_ignore=1 | |
| 34 | net.ipv4.icmp_errors_use_inbound_ifaddr=1 | |
| 35 | ||
| 36 | # Miscellaneous Settings | |
| 37 | ||
| 38 | # Keep ipv6 permanent addresses on an admin down | |
| 39 | net.ipv6.conf.all.keep_addr_on_down=1 | |
| 40 | ||
| 41 | # igmp | |
| 42 | net.ipv4.igmp_max_memberships=1000 | |
| 43 | net.ipv4.neigh.default.mcast_solicit = 10 | |
| 44 | ||
| 45 | # MLD | |
| 46 | net.ipv6.mld_max_msf=512 | |
| 47 | ||
| 48 | # Garbage Collection Settings for ARP and Neighbors | |
| 49 | net.ipv4.neigh.default.gc_thresh2=7168 | |
| 50 | net.ipv4.neigh.default.gc_thresh3=8192 | |
| 51 | net.ipv4.neigh.default.base_reachable_time_ms=14400000 | |
| 52 | net.ipv6.neigh.default.gc_thresh2=3584 | |
| 53 | net.ipv6.neigh.default.gc_thresh3=4096 | |
| 54 | net.ipv6.neigh.default.base_reachable_time_ms=14400000 | |
| 55 | ||
| 56 | # Use neigh information on selection of nexthop for multipath hops | |
| 57 | net.ipv4.fib_multipath_use_neigh=1 | |
| 58 | ||
| 59 | # Allows Apps to Work with VRF | |
| 60 | net.ipv4.tcp_l3mdev_accept=1 | |
| 61 | ``` |