Index: sys/netinet/igmp.c
===================================================================
--- sys/netinet/igmp.c
+++ sys/netinet/igmp.c
@@ -60,7 +60,6 @@
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
 #include <sys/socket.h>
-#include <sys/protosw.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
 #include <sys/sysctl.h>
@@ -93,6 +92,10 @@
 #define KTR_IGMPV3 KTR_INET
 #endif
 
+#define	IGMP_SLOWTIMER_DELAY	(SBT_1MS * 200)		/* 200 ms */
+#define	IGMP_FASTTIMER_DELAY	(SBT_1MS * 500)		/* 500 ms */
+#define	IGMP_RESPONSE_BURST_INTERVAL	(IGMP_FASTTIMER_DELAY / 2)
+
 static struct igmp_ifsoftc *
 		igi_alloc_locked(struct ifnet *);
 static void	igi_delete_locked(const struct ifnet *);
@@ -201,8 +204,8 @@
 /*
  * VIMAGE-wide globals.
  *
- * The IGMPv3 timers themselves need to run per-image, however,
- * protosw timers run globally (see tcp).
+ * The IGMPv3 timers themselves need to run per-image, however, for
+ * historical reasons, timers run globally.  This needs to be improved.
  * An ifnet can only be in one vimage at a time, and the loopback
  * ifnet, loif, is itself virtualized.
  * It would otherwise be possible to seriously hose IGMP state,
@@ -816,7 +819,7 @@
 		case IGMP_AWAKENING_MEMBER:
 			inm->inm_state = IGMP_REPORTING_MEMBER;
 			inm->inm_timer = IGMP_RANDOM_DELAY(
-			    IGMP_V1V2_MAX_RI * PR_FASTHZ);
+			    IGMP_V1V2_MAX_RI * IGMP_FASTTIMER_DELAY);
 			V_current_state_timers_running = 1;
 			break;
 		case IGMP_LEAVING_MEMBER:
@@ -886,7 +889,7 @@
 
 	igmp_set_version(igi, IGMP_VERSION_2);
 
-	timer = igmp->igmp_code * PR_FASTHZ / IGMP_TIMER_SCALE;
+	timer = igmp->igmp_code * IGMP_FASTTIMER_DELAY / IGMP_TIMER_SCALE;
 	if (timer == 0)
 		timer = 1;
 
@@ -1026,7 +1029,7 @@
 		     (IGMP_EXP(igmpv3->igmp_qqi) + 3);
 	}
 
-	timer = maxresp * PR_FASTHZ / IGMP_TIMER_SCALE;
+	timer = maxresp * IGMP_FASTTIMER_DELAY / IGMP_TIMER_SCALE;
 	if (timer == 0)
 		timer = 1;
 
@@ -1655,11 +1658,14 @@
  * Fast timeout handler (global).
  * VIMAGE: Timeout handlers are expected to service all vimages.
  */
-void
-igmp_fasttimo(void)
+static struct callout igmpfast_callout;
+static void
+igmp_fasttimo(void *arg __unused)
 {
+	struct epoch_tracker et;
 	VNET_ITERATOR_DECL(vnet_iter);
 
+	NET_EPOCH_ENTER(et);
 	VNET_LIST_RLOCK_NOSLEEP();
 	VNET_FOREACH(vnet_iter) {
 		CURVNET_SET(vnet_iter);
@@ -1667,6 +1673,10 @@
 		CURVNET_RESTORE();
 	}
 	VNET_LIST_RUNLOCK_NOSLEEP();
+	NET_EPOCH_EXIT(et);
+
+	callout_reset(&igmpfast_callout, IGMP_FASTTIMER_DELAY, igmp_fasttimo,
+	    NULL);
 }
 
 /*
@@ -1741,7 +1751,7 @@
 		if (igi->igi_version == IGMP_VERSION_3) {
 			loop = (igi->igi_flags & IGIF_LOOPBACK) ? 1 : 0;
 			uri_fasthz = IGMP_RANDOM_DELAY(igi->igi_uri *
-			    PR_FASTHZ);
+			    IGMP_FASTTIMER_DELAY);
 			mbufq_init(&qrq, IGMP_MAX_G_GS_PACKETS);
 			mbufq_init(&scq, IGMP_MAX_STATE_CHANGE_PACKETS);
 		}
@@ -2000,7 +2010,7 @@
 		 * Section 8.12.
 		 */
 		old_version_timer = igi->igi_rv * igi->igi_qi + igi->igi_qri;
-		old_version_timer *= PR_SLOWHZ;
+		old_version_timer *= IGMP_SLOWTIMER_DELAY;
 
 		if (version == IGMP_VERSION_1) {
 			igi->igi_v1_timer = old_version_timer;
@@ -2193,11 +2203,14 @@
  * Global slowtimo handler.
  * VIMAGE: Timeout handlers are expected to service all vimages.
  */
-void
-igmp_slowtimo(void)
+static struct callout igmpslow_callout;
+static void
+igmp_slowtimo(void *arg __unused)
 {
+	struct epoch_tracker et;
 	VNET_ITERATOR_DECL(vnet_iter);
 
+	NET_EPOCH_ENTER(et);
 	VNET_LIST_RLOCK_NOSLEEP();
 	VNET_FOREACH(vnet_iter) {
 		CURVNET_SET(vnet_iter);
@@ -2205,6 +2218,10 @@
 		CURVNET_RESTORE();
 	}
 	VNET_LIST_RUNLOCK_NOSLEEP();
+	NET_EPOCH_EXIT(et);
+
+	callout_reset(&igmpslow_callout, IGMP_SLOWTIMER_DELAY, igmp_slowtimo,
+	    NULL);
 }
 
 /*
@@ -2433,7 +2450,7 @@
 			     IGMP_v1_HOST_MEMBERSHIP_REPORT);
 			if (error == 0) {
 				inm->inm_timer = IGMP_RANDOM_DELAY(
-				    IGMP_V1V2_MAX_RI * PR_FASTHZ);
+				    IGMP_V1V2_MAX_RI * IGMP_FASTTIMER_DELAY);
 				V_current_state_timers_running = 1;
 			}
 			break;
@@ -3688,6 +3705,12 @@
 		IGMP_LOCK_INIT();
 		m_raopt = igmp_ra_alloc();
 		netisr_register(&igmp_nh);
+		callout_init(&igmpslow_callout, 1);
+		callout_reset(&igmpslow_callout, IGMP_SLOWTIMER_DELAY,
+		    igmp_slowtimo, NULL);
+		callout_init(&igmpfast_callout, 1);
+		callout_reset(&igmpfast_callout, IGMP_FASTTIMER_DELAY,
+		    igmp_fasttimo, NULL);
 		break;
 	case MOD_UNLOAD:
 		CTR1(KTR_IGMPV3, "%s: tearing down", __func__);
Index: sys/netinet/igmp_var.h
===================================================================
--- sys/netinet/igmp_var.h
+++ sys/netinet/igmp_var.h
@@ -148,7 +148,6 @@
 #define IGMP_MAX_STATE_CHANGE_PACKETS	8 /* # of packets per state change */
 #define IGMP_MAX_RESPONSE_PACKETS	16 /* # of packets for general query */
 #define IGMP_MAX_RESPONSE_BURST		4 /* # of responses to send at once */
-#define IGMP_RESPONSE_BURST_INTERVAL	(PR_FASTHZ / 2)	/* 500ms */
 
 /*
  * IGMP-specific mbuf flags.
@@ -223,13 +222,11 @@
 };
 
 int	igmp_change_state(struct in_multi *);
-void	igmp_fasttimo(void);
 struct igmp_ifsoftc *
 	igmp_domifattach(struct ifnet *);
 void	igmp_domifdetach(struct ifnet *);
 void	igmp_ifdetach(struct ifnet *);
 int	igmp_input(struct mbuf **, int *, int);
-void	igmp_slowtimo(void);
 
 SYSCTL_DECL(_net_inet_igmp);
 
Index: sys/netinet/in_proto.c
===================================================================
--- sys/netinet/in_proto.c
+++ sys/netinet/in_proto.c
@@ -184,8 +184,6 @@
 	.pr_protocol =		IPPROTO_IGMP,
 	.pr_flags =		PR_ATOMIC|PR_ADDR,
 	.pr_ctloutput =		rip_ctloutput,
-	.pr_fasttimo =		igmp_fasttimo,
-	.pr_slowtimo =		igmp_slowtimo,
 	.pr_usrreqs =		&rip_usrreqs
 },
 {