sysctl命令用于运行时配置内核参数，这些参数位于/proc/sys目录下。sysctl配置与显示在/proc/sys目录中的内核参数．可以用sysctl来设置或重新设置联网功能，如IP转发、IP碎片去除以及源路由检查等。用户只需要编辑/etc/文件，即可手工或自动执行由sysctl控制的功能。
命令格式：
sysctl [-n] [-e] -w variable=value
sysctl [-n] [-e] -p <filename> (default /etc/)
sysctl [-n] [-e] -a
常用参数的意义：
-w 临时改变某个指定参数的值，如
sysctl -w net.ipv4.ip_forward=1
-a 显示所有的系统参数
-p 从指定的文件加载系统参数，如不指定即从/etc/中加载
如果仅仅是想临时改变某个系统参数的值，可以用两种方法来实现,例如想启用IP路由转发功能：
1) #echo 1 > /proc/sys/net/ipv4/ip_forward
2) #sysctl -w net.ipv4.ip_forward=1
以上两种方法都可能立即开启路由功能，但如果系统重启，或执行了
# service network restart
命令，所设置的值即会丢失，如果想永久保留配置，可以修改/etc/文件
将 net.ipv4.ip_forward=0改为net.ipv4.ip_forward=1
1, sysctl命令的作用
在运行时配置内核参数
2,用法举例:
-w 用此选项来改变一个sysctl设置
例:sysctl -w net.ipv4.ip_forward=1
-p 载入sysctl配置文件
如-p后未指定路径，则载入 /etc/
例: sysctl -p /etc/
001 |
了解这些内核参数的意义对于解决问题会很有帮助。 |
003 |
kernel.sched_child_runs_first = 0 |
004 |
kernel.sched_min_granularity_ns = 750000 |
005 |
kernel.sched_latency_ns = 6000000 |
006 |
kernel.sched_wakeup_granularity_ns = 1000000 |
007 |
kernel.sched_tunable_scaling = 1 |
008 |
kernel.sched_migration_cost = 500000 |
009 |
kernel.sched_nr_migrate = 32 |
010 |
kernel.sched_time_avg = 1000 |
011 |
kernel.sched_shares_window = 10000000 |
012 |
kernel.timer_migration = 1 |
013 |
kernel.sched_rt_period_us = 1000000 |
014 |
kernel.sched_rt_runtime_us = 950000 |
016 |
kernel.core_uses_pid = 0 |
017 |
kernel.core_pattern = core |
018 |
kernel.core_pipe_limit = 0 |
023 |
kernel.modules_disabled = 0 |
030 |
.read_wakeup_threshold = 64 |
031 |
.write_wakeup_threshold = 128 |
032 |
.boot_id = 9e7b0657-6f91-4e94-9c05-55c49dd99da9 |
033 |
= 309f03a1-28d0-47e0-9616-a390bb0349ba |
034 |
= 4294967295 4294967295 |
035 |
= 4294967295 4294967295 |
038 |
kernel.pid_max = 32768 |
039 |
kernel.panic_on_oops = 0 |
041 |
kernel.printk_ratelimit = 5 |
042 |
kernel.printk_ratelimit_burst = 10 |
043 |
kernel.printk_delay = 0 |
044 |
kernel.dmesg_restrict = 0 |
045 |
kernel.kptr_restrict = 0 |
046 |
kernel.ngroups_max = 65536 |
047 |
kernel.randomize_va_space = 1 |
048 |
kernel.max_lock_depth = 1024 |
049 |
kernel.poweroff_cmd = /sbin/poweroff |
050 |
kernel.blk_iopoll = 1 |
054 |
kernel.hostname= 1234
|
063 |
kernel.auto_msgmni = 1 |
066 |
vm.overcommit_memory = 0 |
068 |
vm.oom_kill_allocating_task = 0 |
069 |
vm.oom_dump_tasks = 1 |
070 |
vm.overcommit_ratio = 50 |
072 |
vm.dirty_background_ratio = 10 |
073 |
vm.dirty_background_bytes = 0 |
076 |
vm.dirty_writeback_centisecs = 500 |
077 |
vm.dirty_expire_centisecs = 3000 |
078 |
vm.nr_pdflush_threads = 0 |
080 |
vm.lowmem_reserve_ratio = 256 32 32 |
082 |
vm.min_free_kbytes = 2188 |
083 |
vm.min_free_order_shift = 1 |
084 |
vm.percpu_pagelist_fraction = 0 |
085 |
vm.max_map_count = 65530 |
088 |
vm.vfs_cache_pressure = 100 |
089 |
vm.mmap_min_addr = 4096 |
090 |
vm.highmem_is_dirtyable = 0 |
091 |
vm.scan_unevictable_pages = 0 |
093 |
-state = 2145 0 0 0 0 0 0 |
094 |
fs.file-nr = 297 0 29469
|
097 |
-state = 2777 2184 45 0 0 0 |
101 |
fs.dir-notify-enable= 1
|
105 |
.max_user_instances = 128 |
106 |
.max_user_watches = 8192 |
107 |
.max_queued_events = 16384 |
108 |
.max_user_watches = 111805 |
116 |
.xfrm_aevent_etime = 10 |
117 |
.xfrm_aevent_rseqth = 2 |
118 |
.xfrm_larval_drop = 1 |
119 |
.xfrm_acq_expires = 30 |
122 |
.wmem_default = 108544 |
123 |
.rmem_default = 108544 |
125 |
.netdev_max_backlog = 1000 |
126 |
.netdev_tstamp_prequeue = 1 |
132 |
net..gc_thresh = 4096 |
133 |
net..max_size = 65536 |
134 |
net..gc_min_interval = 0 |
135 |
net..gc_min_interval_ms = 500 |
136 |
net..gc_timeout = 300 |
137 |
net..gc_interval = 60 |
138 |
net..redirect_load = 4 |
139 |
net..redirect_number = 9 |
140 |
net..redirect_silence = 4096 |
141 |
net..error_cost = 200 |
142 |
net..error_burst = 1000 |
143 |
net..gc_elasticity = 8 |
144 |
net..mtu_expires = 600 |
146 |
net..min_adv_mss = 256 |
147 |
net..mcast_solicit = 3 |
148 |
net..ucast_solicit = 3 |
150 |
net..retrans_time = 100 |
151 |
net..base_reachable_time = 30 |
152 |
net..delay_first_probe_time = 5 |
153 |
net..gc_stale_time = 60 |
156 |
net..anycast_delay = 100 |
157 |
net..proxy_delay = 80 |
159 |
net..retrans_time_ms = 1000 |
160 |
net..base_reachable_time_ms = 30000 |
161 |
net..gc_interval = 30 |
162 |
net..gc_thresh1 = 128 |
163 |
net..gc_thresh2 = 512 |
164 |
net..gc_thresh3 = 1024 |
165 |
net..mcast_solicit = 3 |
166 |
net..ucast_solicit = 3 |
168 |
net..retrans_time = 100 |
169 |
net..base_reachable_time = 30 |
170 |
net..delay_first_probe_time = 5 |
171 |
net..gc_stale_time = 60 |
174 |
net..anycast_delay = 100 |
175 |
net..proxy_delay = 80 |
177 |
net..retrans_time_ms = 1000 |
178 |
net..base_reachable_time_ms = 30000 |
179 |
net..eth0.mcast_solicit = 3 |
180 |
net..eth0.ucast_solicit = 3 |
181 |
net..eth0.app_solicit = 0 |
182 |
net..eth0.retrans_time = 100 |
183 |
net..eth0.base_reachable_time = 30 |
184 |
net..eth0.delay_first_probe_time = 5 |
185 |
net..eth0.gc_stale_time = 60 |
186 |
net..eth0.unres_qlen = 3 |
187 |
net..eth0.proxy_qlen = 64 |
188 |
net..eth0.anycast_delay = 100 |
189 |
net..eth0.proxy_delay = 80 |
191 |
net..eth0.retrans_time_ms = 1000 |
192 |
net..eth0.base_reachable_time_ms = 30000 |
193 |
net..sit0.mcast_solicit = 3 |
194 |
net..sit0.ucast_solicit = 3 |
195 |
net..sit0.app_solicit = 0 |
196 |
net..sit0.retrans_time = 100 |
197 |
net..sit0.base_reachable_time = 30 |
198 |
net..sit0.delay_first_probe_time = 5 |
199 |
net..sit0.gc_stale_time = 60 |
200 |
net..sit0.unres_qlen = 3 |
201 |
net..sit0.proxy_qlen = 64 |
202 |
net..sit0.anycast_delay = 100 |
203 |
net..sit0.proxy_delay = 80 |
205 |
net..sit0.retrans_time_ms = 1000 |
206 |
net..sit0.base_reachable_time_ms = 30000 |
207 |
net.ipv4.tcp_timestamps = 1 |
208 |
net.ipv4.tcp_window_scaling = 6 |
209 |
net.ipv4.tcp_sack = 1 |
210 |
net.ipv4.tcp_retrans_collapse = 1 |
211 |
net.ipv4.ip_default_ttl = 64 |
212 |
net.ipv4.ip_no_pmtu_disc = 0 |
213 |
net.ipv4.ip_nonlocal_bind = 0 |
214 |
net.ipv4.tcp_syn_retries = 5 |
215 |
net.ipv4.tcp_synack_retries = 5 |
216 |
net.ipv4.tcp_max_orphans = 8192 |
217 |
net.ipv4.tcp_max_tw_buckets = 8192 |
218 |
net.ipv4.ip_dynaddr = 0 |
219 |
net.ipv4.tcp_keepalive_time = 7200 |
220 |
net.ipv4.tcp_keepalive_probes = 9 |
221 |
net.ipv4.tcp_keepalive_intvl = 75 |
222 |
net.ipv4.tcp_retries1 = 3 |
223 |
net.ipv4.tcp_retries2 = 15 |
224 |
net.ipv4.tcp_fin_timeout = 60 |
225 |
net.ipv4.tcp_tw_recycle = 0 |
226 |
net.ipv4.tcp_abort_on_overflow = 0 |
227 |
net.ipv4.tcp_stdurg = 0 |
228 |
net.ipv4.tcp_rfc1337 = 0 |
229 |
net.ipv4.tcp_max_syn_backlog = 128 |
230 |
net.ipv4.ip_local_port_range = 32768 61000 |
231 |
net.ipv4.ip_local_reserved_ports = |
232 |
net.ipv4.igmp_max_memberships = 20 |
233 |
net.ipv4.igmp_max_msf = 10 |
234 |
net.ipv4.inet_peer_threshold = 65664 |
235 |
net.ipv4.inet_peer_minttl = 120 |
236 |
net.ipv4.inet_peer_maxttl = 600 |
237 |
net.ipv4.inet_peer_gc_mintime = 10 |
238 |
net.ipv4.inet_peer_gc_maxtime = 120 |
239 |
net.ipv4.tcp_orphan_retries = 0 |
240 |
net.ipv4.tcp_fack = 1 |
241 |
net.ipv4.tcp_reordering = 3 |
243 |
net.ipv4.tcp_dsack = 1 |
244 |
net.ipv4.tcp_mem = 7014 9354 14028 |
245 |
net.ipv4.tcp_wmem = 4096 16384 299328 |
246 |
net.ipv4.tcp_rmem = 4096 87380 299328 |
247 |
net.ipv4.tcp_app_win = 31 |
248 |
net.ipv4.tcp_adv_win_scale = 2 |
249 |
net.ipv4.tcp_tw_reuse = 0 |
250 |
net.ipv4.tcp_frto = 2 |
251 |
net.ipv4.tcp_frto_response = 0 |
252 |
net.ipv4.tcp_low_latency = 0 |
253 |
net.ipv4.tcp_no_metrics_save = 0 |
254 |
net.ipv4.tcp_moderate_rcvbuf = 1 |
255 |
net.ipv4.tcp_tso_win_divisor = 3 |
256 |
net.ipv4.tcp_congestion_control = cubic |
258 |
net.ipv4.tcp_mtu_probing = 0 |
259 |
net.ipv4.tcp_base_mss = 512 |
260 |
net.ipv4.tcp_workaround_signed_windows = 0 |
261 |
net.ipv4.tcp_slow_start_after_idle = 1 |
262 |
net.ipv4.tcp_available_congestion_control = cubic reno |
263 |
net.ipv4.tcp_allowed_congestion_control = cubic reno |
264 |
net.ipv4.tcp_max_ssthresh = 0 |
265 |
net.ipv4.tcp_cookie_size = 0 |
266 |
net.ipv4.tcp_thin_linear_timeouts = 0 |
267 |
net.ipv4.tcp_thin_dupack = 0 |
268 |
net.ipv4.udp_mem = 7014 9354 14028 |
269 |
net.ipv4.udp_rmem_min = 4096 |
270 |
net.ipv4.udp_wmem_min = 4096 |
272 |
net..mc_forwarding = 0 |
273 |
net..accept_redirects = 1 |
274 |
net..secure_redirects = 1 |
275 |
net..shared_media = 1 |
277 |
net..send_redirects = 1 |
278 |
net..accept_source_route = 0 |
279 |
net..accept_local = 0 |
280 |
net..src_valid_mark = 0 |
284 |
net..log_martians = 0 |
287 |
net..arp_announce = 0 |
291 |
net..proxy_arp_pvlan = 0 |
292 |
net..disable_xfrm = 0 |
293 |
net..disable_policy = 0 |
294 |
net..force_igmp_version = 0 |
295 |
net..promote_secondaries = 0 |
297 |
net..mc_forwarding = 0 |
298 |
net..accept_redirects = 1 |
299 |
net..secure_redirects = 1 |
300 |
net..shared_media = 1 |
302 |
net..send_redirects = 1 |
303 |
net..accept_source_route = 1 |
304 |
net..accept_local = 0 |
305 |
net..src_valid_mark = 0 |
309 |
net..log_martians = 0 |
312 |
net..arp_announce = 0 |
316 |
net..proxy_arp_pvlan = 0 |
317 |
net..disable_xfrm = 0 |
318 |
net..disable_policy = 0 |
319 |
net..force_igmp_version = 0 |
320 |
net..promote_secondaries = 0 |
322 |
net..mc_forwarding = 0 |
323 |
net..accept_redirects = 1 |
324 |
net..secure_redirects = 1 |
325 |
net..shared_media = 1 |
327 |
net..send_redirects = 1 |
328 |
net..accept_source_route = 1 |
329 |
net..accept_local = 0 |
330 |
net..src_valid_mark = 0 |
334 |
net..log_martians = 0 |
337 |
net..arp_announce = 0 |
341 |
net..proxy_arp_pvlan = 0 |
342 |
net..disable_xfrm = 1 |
343 |
net..disable_policy = 1 |
344 |
net..force_igmp_version = 0 |
345 |
net..promote_secondaries = 0 |
347 |
net..eth0.mc_forwarding = 0 |
348 |
net..eth0.accept_redirects = 1 |
349 |
net..eth0.secure_redirects = 1 |
350 |
net..eth0.shared_media = 1 |
351 |
net..eth0.rp_filter = 0[ 2414.137398] process `sysctl' is using deprecated sysctl (syscall) net..retrans_time; Use net..retrans_time_ms instead. |
353 |
net..eth0.send_redirects = 1 |
354 |
net..eth0.accept_source_route = 1 |
355 |
net..eth0.accept_local = 0 |
356 |
net..eth0.src_valid_mark = 0 |
357 |
net..eth0.proxy_arp = 0 |
358 |
net..eth0.medium_id = 0 |
359 |
net..eth0.bootp_relay = 0 |
360 |
net..eth0.log_martians = 0 |
362 |
net..eth0.arp_filter = 0 |
363 |
net..eth0.arp_announce = 0 |
364 |
net..eth0.arp_ignore = 0 |
365 |
net..eth0.arp_accept = 0 |
366 |
net..eth0.arp_notify = 0 |
367 |
net..eth0.proxy_arp_pvlan = 0 |
368 |
net..eth0.disable_xfrm = 0 |
369 |
net..eth0.disable_policy = 0 |
370 |
net..eth0.force_igmp_version = 0 |
371 |
net..eth0.promote_secondaries = 0 |
373 |
net..sit0.mc_forwarding = 0 |
374 |
net..sit0.accept_redirects = 1 |
375 |
net..sit0.secure_redirects = 1 |
376 |
net..sit0.shared_media = 1 |
377 |
net..sit0.rp_filter = 0 |
378 |
net..sit0.send_redirects = 1 |
379 |
net..sit0.accept_source_route = 1 |
380 |
net..sit0.accept_local = 0 |
381 |
net..sit0.src_valid_mark = 0 |
382 |
net..sit0.proxy_arp = 0 |
383 |
net..sit0.medium_id = 0 |
384 |
net..sit0.bootp_relay = 0 |
385 |
net..sit0.log_martians = 0 |
387 |
net..sit0.arp_filter = 0 |
388 |
net..sit0.arp_announce = 0 |
389 |
net..sit0.arp_ignore = 0 |
390 |
net..sit0.arp_accept = 0 |
391 |
net..sit0.arp_notify = 0 |
392 |
net..sit0.proxy_arp_pvlan = 0 |
393 |
net..sit0.disable_xfrm = 0 |
394 |
net..sit0.disable_policy = 0 |
395 |
net..sit0.force_igmp_version = 0 |
396 |
net..sit0.promote_secondaries = 0 |
397 |
net.ipv4.ip_forward = 0 |
398 |
net.ipv4.xfrm4_gc_thresh = 32768 |
399 |
net.ipv4.ipfrag_high_thresh = 262144 |
400 |
net.ipv4.ipfrag_low_thresh = 196608 |
401 |
net.ipv4.ipfrag_time = 30 |
402 |
net.ipv4.icmp_echo_ignore_all = 0 |
403 |
net.ipv4.icmp_echo_ignore_broadcasts = 1 |
404 |
net.ipv4.icmp_ignore_bogus_error_responses = 1 |
405 |
net.ipv4.icmp_errors_use_inbound_ifaddr = 0 |
406 |
net.ipv4.icmp_ratelimit = 1000 |
407 |
net.ipv4.icmp_ratemask = 6168 |
408 |
net.ipv4.rt_cache_rebuild_count = 4 |
409 |
net.ipv4.ping_group_range = 1 0 |
410 |
net.ipv4.ipfrag_secret_interval = 600 |
411 |
net.ipv4.ipfrag_max_dist = 64 |
412 |
net..mcast_solicit = 3 |
413 |
net..ucast_solicit = 3 |
415 |
net..retrans_time = 200 |
416 |
net..base_reachable_time = 30 |
417 |
net..delay_first_probe_time = 5 |
418 |
net..gc_stale_time = 60 |
421 |
net..anycast_delay = 100 |
422 |
net..proxy_delay = 80 |
424 |
net..retrans_time_ms = 1000 |
425 |
net..base_reachable_time_ms = 30000 |
426 |
net..gc_interval = 30 |
427 |
net..gc_thresh1 = 128 |
428 |
net..gc_thresh2 = 512 |
429 |
net..gc_thresh3 = 1024 |
430 |
net..mcast_solicit = 3 |
431 |
net..ucast_solicit = 3 |
433 |
net..retrans_time = 200 |
434 |
net..base_reachable_time = 30 |
435 |
net..delay_first_probe_time = 5 |
436 |
net..gc_stale_time = 60 |
439 |
net..anycast_delay = 100 |
440 |
net..proxy_delay = 80 |
442 |
net..retrans_time_ms = 1000 |
443 |
net..base_reachable_time_ms = 30000 |
444 |
net..eth0.mcast_solicit = 3 |
445 |
net..eth0.ucast_solicit = 3 |
446 |
net..eth0.app_solicit = 0 |
447 |
net..eth0.retrans_time = 200 |
448 |
net..eth0.base_reachable_time = 30 |
449 |
net..eth0.delay_first_probe_time = 5 |
450 |
net..eth0.gc_stale_time = 60 |
451 |
net..eth0.unres_qlen = 3 |
452 |
net..eth0.proxy_qlen = 64 |
453 |
net..eth0.anycast_delay = 100 |
454 |
net..eth0.proxy_delay = 80 |
456 |
net..eth0.retrans_time_ms = 1000 |
457 |
net..eth0.base_reachable_time_ms = 30000 |
458 |
net..sit0.mcast_solicit = 3 |
459 |
net..sit0.ucast_solicit = 3 |
460 |
net..sit0.app_solicit = 0 |
461 |
net..sit0.retrans_time = 200 |
462 |
net..sit0.base_reachable_time = 30 |
463 |
net..sit0.delay_first_probe_time = 5 |
464 |
net..sit0.gc_stale_time = 60 |
465 |
net..sit0.unres_qlen = 3 |
466 |
net..sit0.proxy_qlen = 64 |
467 |
net..sit0.anycast_delay = 100 |
468 |
net..sit0.proxy_delay = 80 |
470 |
net..sit0.retrans_time_ms = 1000 |
471 |
net..sit0.base_reachable_time_ms = 30000 |
472 |
net.ipv6.xfrm6_gc_thresh = 1024 |
477 |
net..accept_redirects = 1 |
479 |
net..dad_transmits = 1 |
480 |
net..router_solicitations = 3 |
481 |
net..router_solicitation_interval = 4 |
482 |
net..router_solicitation_delay = 1 |
483 |
net..force_mld_version = 0 |
484 |
net..max_addresses = 16 |
485 |
net..accept_ra_defrtr = 1 |
486 |
net..accept_ra_pinfo = 1 |
488 |
net..accept_source_route = 0 |
489 |
net..disable_ipv6 = 1 |
496 |
net..accept_redirects = 1 |
498 |
net..dad_transmits = 1 |
499 |
net..router_solicitations = 3 |
500 |
net..router_solicitation_interval = 4 |
501 |
net..router_solicitation_delay = 1 |
502 |
net..force_mld_version = 0 |
503 |
net..max_addresses = 16 |
504 |
net..accept_ra_defrtr = 1 |
505 |
net..accept_ra_pinfo = 1 |
507 |
net..accept_source_route = 0 |
508 |
net..disable_ipv6 = 1 |
515 |
net..accept_redirects = 1 |
517 |
net..dad_transmits = 1 |
518 |
net..router_solicitations = 3 |
519 |
net..router_solicitation_interval = 4 |
520 |
net..router_solicitation_delay = 1 |
521 |
net..force_mld_version = 0 |
522 |
net..max_addresses = 16 |
523 |
net..accept_ra_defrtr = 1 |
524 |
net..accept_ra_pinfo = 1 |
526 |
net..accept_source_route = 0 |
527 |
net..disable_ipv6 = 1 |
531 |
net..eth0.hop_limit = 64 |
533 |
net..eth0.accept_ra = 1 |
534 |
net..eth0.accept_redirects = 1 |
536 |
net..eth0.dad_transmits = 1 |
537 |
net..eth0.router_solicitations = 3 |
538 |
net..eth0.router_solicitation_interval = 4 |
539 |
net..eth0.router_solicitation_delay = 1 |
540 |
net..eth0.force_mld_version = 0 |
541 |
net..eth0.max_addresses = 16 |
542 |
net..eth0.accept_ra_defrtr = 1 |
543 |
net..eth0.accept_ra_pinfo = 1 |
544 |
net..eth0.proxy_ndp = 0 |
545 |
net..eth0.accept_source_route = 0 |
546 |
net..eth0.disable_ipv6 = 1 |
547 |
net..eth0.accept_dad = 1 |
548 |
net..eth0.force_tllao = 0 |
550 |
net..sit0.hop_limit = 64 |
552 |
net..sit0.accept_ra = 1 |
553 |
net..sit0.accept_redirects = 1 |
555 |
net..sit0.dad_transmits = 1 |
556 |
net..sit0.router_solicitations = 3 |
557 |
net..sit0.router_solicitation_interval = 4 |
558 |
net..sit0.router_solicitation_delay = 1 |
559 |
net..sit0.force_mld_version = 0 |
560 |
net..sit0.max_addresses = 16 |
561 |
net..sit0.accept_ra_defrtr = 1 |
562 |
net..sit0.accept_ra_pinfo = 1 |
563 |
net..sit0.proxy_ndp = 0 |
564 |
net..sit0.accept_source_route = 0 |
565 |
net..sit0.disable_ipv6 = 1 |
566 |
net..sit0.accept_dad = -1 |
567 |
net..sit0.force_tllao = 0 |
568 |
net.ipv6.ip6frag_high_thresh = 262144 |
569 |
net.ipv6.ip6frag_low_thresh = 196608 |
570 |
net.ipv6.ip6frag_time = 60 |
571 |
net..gc_thresh = 1024 |
573 |
net..gc_min_interval = 0 |
575 |
net..gc_interval = 30 |
576 |
net..gc_elasticity = 9 |
577 |
net..mtu_expires = 600 |
578 |
net..min_adv_mss = 1220 |
579 |
net..gc_min_interval_ms = 500 |
581 |
net.ipv6.bindv6only = 0 |
582 |
net.ipv6.ip6frag_secret_interval = 600 |
583 |
net.ipv6.mld_max_msf = 64 |
