diff --git a/bgpd/bgp_aspath.c b/bgpd/bgp_aspath.c
index 365c2fee4..b07d9ff3c 100644
--- a/bgpd/bgp_aspath.c
+++ b/bgpd/bgp_aspath.c
@@ -1685,6 +1685,7 @@ struct aspath *aspath_reconcile_as4(struct aspath *aspath,
 						" across 2/4 ASN boundary somewhere, broken..");
 				hops = seg->length;
 			}
+			/* fallthru */
 		case AS_SEQUENCE:
 			cpasns = MIN(seg->length, hops);
 			hops -= seg->length;
diff --git a/bgpd/bgp_fsm.c b/bgpd/bgp_fsm.c
index 5e117d767..dcaea737a 100644
--- a/bgpd/bgp_fsm.c
+++ b/bgpd/bgp_fsm.c
@@ -338,6 +338,7 @@ void bgp_timer_set(struct peer *peer)
 		BGP_TIMER_OFF(peer->t_gr_restart);
 		BGP_TIMER_OFF(peer->t_gr_stale);
 		BGP_TIMER_OFF(peer->t_pmax_restart);
+		/* fallthru */
 	case Clearing:
 		BGP_TIMER_OFF(peer->t_start);
 		BGP_TIMER_OFF(peer->t_connect);
diff --git a/bgpd/bgp_main.c b/bgpd/bgp_main.c
index 79a294bd4..29b59c432 100644
--- a/bgpd/bgp_main.c
+++ b/bgpd/bgp_main.c
@@ -387,7 +387,8 @@ int main(int argc, char **argv)
 			break;
 		case 'l':
 			bgp_address = optarg;
-		/* listenon implies -n */
+			/* listenon implies -n */
+			/* fallthru */
 		case 'n':
 			no_fib_flag = 1;
 			break;
diff --git a/debianpkg/Makefile.am b/debianpkg/Makefile.am
index 5ab5b4c4f..6bb01dffb 100644
--- a/debianpkg/Makefile.am
+++ b/debianpkg/Makefile.am
@@ -29,6 +29,10 @@ EXTRA_DIST = README.Debian README.Maintainer \
 	backports/ubuntu16.04/debian/source/format \
 	backports/ubuntu16.04/exclude \
 	backports/ubuntu16.04/versionext \
+	backports/ubuntu17.10/debian/control \
+	backports/ubuntu17.10/debian/source/format \
+	backports/ubuntu17.10/exclude \
+	backports/ubuntu17.10/versionext \
 	frr-doc.docs frr-doc.info frr-doc.install \
 	frr-doc.lintian-overrides frr.conf \
 	frr.dirs frr.docs frr.install \
diff --git a/debianpkg/README.deb_build.md b/debianpkg/README.deb_build.md
index 3156c3672..0d02bc3dc 100644
--- a/debianpkg/README.deb_build.md
+++ b/debianpkg/README.deb_build.md
@@ -1,21 +1,26 @@
 Building your own FRRouting Debian Package
 ==========================================
-(Tested on Ubuntu 12.04, 14.04, 16.04 and Debian 8)
+(Tested on Ubuntu 12.04, 14.04, 16.04, 17.10, Debian 8 and 9)
+
+**Note:**  If you try to build for a different distro, then it will most likely
+fail because of the missing backport. See debianpkg/backports/README about
+adding a new backport.
 
 1. Follow the package installation as outlined in doc/Building_on_XXXX.md
    (XXXX refers your OS Distribution) to install the required build packages
 
 2. Install the following additional packages:
 
-        apt-get install realpath equivs groff fakeroot debhelper
+        apt-get install realpath equivs groff fakeroot debhelper devscripts
 
 3. Checkout FRR under a **unpriviledged** user account
 
         git clone https://github.com/frrouting/frr.git frr
+        cd frr
+	# git checkout <branch>    - if different branch than master
 
 4. Run Bootstrap and make distribution tar.gz
 
-        cd frr
         ./bootstrap.sh
         ./configure --with-pkg-extra-version=-MyDebPkgVersion
         make dist
@@ -44,7 +49,7 @@ Building your own FRRouting Debian Package
     and multiple `frr_*.debian.tar.xz` and `frr_*.dsc` for the debian package
     source on each backport supported distribution
 
-6. Create a new directory to build the package and populate with package src
+7. Create a new directory to build the package and populate with package src
 
         mkdir frrpkg
         cd frrpkg
@@ -53,12 +58,21 @@ Building your own FRRouting Debian Package
         . /etc/os-release
         tar xf ~/frr/frr_*${ID}${VERSION_ID}*.debian.tar.xz
 
-7. Build Debian Package Dependencies and install them as needed
+8. Build Debian Package Dependencies and install them as needed
 
         sudo mk-build-deps --install debian/control
 
-8. Build Debian Package
+9. Build Debian Package
 
+    Building with standard options:
+
+        debuild -b -uc -us
+
+    Or change some options:
+    (see `rules` file for available options)
+
+        export WANT_BGP_VNC=1
+	export WANT_WANT_CUMULUS_MODE=1
         debuild -b -uc -us
 
 DONE.
@@ -83,7 +97,7 @@ allowed.
 
             sudo update-rc.d frr defaults
 
-    - On `systemd` based systems (Debian 8, Ubuntu 14.04, 16.04)
+    - On `systemd` based systems (Debian 8, 9, Ubuntu 14.04, 16.04, 17.10)
 
             sudo systemctl enable frr
 
@@ -93,7 +107,7 @@ allowed.
 
             sudo invoke-rc.d frr start
 
-    - on `systemd` based systems (Debian 8, Ubuntu 14.04, 16.04)
+    - on `systemd` based systems (Debian 8, 9, Ubuntu 14.04, 16.04, 17.10)
 
             sudo systemctl start frr
 
diff --git a/debianpkg/backports/ubuntu17.10/debian/control b/debianpkg/backports/ubuntu17.10/debian/control
new file mode 100644
index 000000000..308328169
--- /dev/null
+++ b/debianpkg/backports/ubuntu17.10/debian/control
@@ -0,0 +1,54 @@
+Source: frr
+Section: net
+Priority: optional
+Maintainer: Nobody <nobody@frrouting.org>
+Uploaders: Nobody <nobody@frrouting.org>
+XSBC-Original-Maintainer: <maintainers@frrouting.org>
+Build-Depends: debhelper (>= 7.0.50~), libncurses5-dev, libreadline-dev, texlive-latex-base, texlive-generic-recommended, libpam0g-dev | libpam-dev, libcap-dev, texinfo (>= 4.7), imagemagick, ghostscript, groff, autotools-dev, libpcre3-dev, gawk, chrpath, libsnmp-dev, git, dh-autoreconf, libjson-c-dev, libjson-c2 | libjson-c3, dh-systemd, libsystemd-dev, bison, flex, libc-ares-dev, pkg-config, python (>= 2.7), python-ipaddr
+Standards-Version: 3.9.6
+Homepage: http://www.frrouting.org/
+
+Package: frr
+Architecture: any
+Depends: ${shlibs:Depends}, logrotate (>= 3.2-11), iproute2 | iproute, ${misc:Depends}, libc-ares2
+Pre-Depends: adduser
+Conflicts: zebra, zebra-pj, quagga
+Replaces: zebra, zebra-pj
+Suggests: snmpd
+Description: BGP/OSPF/RIP/RIPng/ISIS/PIM/LDP routing daemon forked from Quagga
+ FRR is free software which manages TCP/IP based routing protocols.
+ It supports BGP4, BGP4+, OSPFv2, OSPFv3, IS-IS, RIPv1, RIPv2, RIPng,
+ PIM and LDP as well as the IPv6 versions of these.
+ .
+ FRR is a fork of Quagga with an open community model. The main git
+ lives on https://github.com/frrouting/frr.git
+
+Package: frr-dbg
+Architecture: any
+Depends: ${shlibs:Depends}, ${misc:Depends}, frr (= ${binary:Version})
+Priority: optional
+Section: debug
+Description: BGP/OSPF/RIP/RIPng/ISIS/PIM/LDP routing daemon (debug symbols)
+ This package provides debugging symbols for all binary packages built
+ from frr source package. It's highly recommended to have this package
+ installed before reporting any FRR crashes to either FRR developers or
+ Debian package maintainers.
+
+Package: frr-doc
+Section: net
+Architecture: all
+Depends: ${misc:Depends}
+Suggests: frr
+Description: BGP/OSPF/RIP/RIPng/ISIS/PIM/LDP routing daemon (documentation)
+ This package includes info files for frr, a free software which manages
+ TCP/IP based routing protocols.  It supports BGP4, BGP4+, OSPFv2, OSPFv3,
+ IS-IS, RIPv1, RIPv2, RIPng, PIM and LDP as well as the IPv6 versions of these.
+
+Package: frr-pythontools
+Section: net
+Architecture: all
+Depends: ${misc:Depends}, frr (= ${binary:Version}), python (>= 2.7), python-ipaddr
+Description: BGP/OSPF/RIP/RIPng/ISIS/PIM/LDP routing daemon (Python Tools)
+ This package includes info files for frr, a free software which manages
+ TCP/IP based routing protocols.  It supports BGP4, BGP4+, OSPFv2, OSPFv3,
+ IS-IS, RIPv1, RIPv2, RIPng, PIM and LDP as well as the IPv6 versions of these.
diff --git a/debianpkg/backports/ubuntu17.10/debian/source/format b/debianpkg/backports/ubuntu17.10/debian/source/format
new file mode 100644
index 000000000..163aaf8d8
--- /dev/null
+++ b/debianpkg/backports/ubuntu17.10/debian/source/format
@@ -0,0 +1 @@
+3.0 (quilt)
diff --git a/debianpkg/backports/ubuntu17.10/exclude b/debianpkg/backports/ubuntu17.10/exclude
new file mode 100644
index 000000000..e69de29bb
diff --git a/debianpkg/backports/ubuntu17.10/versionext b/debianpkg/backports/ubuntu17.10/versionext
new file mode 100644
index 000000000..bfbeccd65
--- /dev/null
+++ b/debianpkg/backports/ubuntu17.10/versionext
@@ -0,0 +1 @@
+-1~ubuntu17.10+1
diff --git a/debianpkg/frr.preinst b/debianpkg/frr.preinst
index 29162e3b5..467bea971 100644
--- a/debianpkg/frr.preinst
+++ b/debianpkg/frr.preinst
@@ -30,7 +30,7 @@ fi
 # frr and as such we need to intelligently
 # check to see if the frr user is in the frrvty
 # group.
-if ! /usr/bin/id frr | grep &>/dev/null 'frrvty'; then
+if ! id frr | grep &>/dev/null 'frrvty'; then
     usermod -a -G frrvty frr >/dev/null
 fi
 
diff --git a/debianpkg/rules b/debianpkg/rules
index 04d28762a..a6a9077da 100755
--- a/debianpkg/rules
+++ b/debianpkg/rules
@@ -190,7 +190,7 @@ override_dh_systemd_enable:
 
 # backports
 SRCPKG = frr
-KNOWN_BACKPORTS = debian8 debian9 ubuntu12.04 ubuntu14.04 ubuntu16.04
+KNOWN_BACKPORTS = debian8 debian9 ubuntu12.04 ubuntu14.04 ubuntu16.04 ubuntu17.10
 DEBIAN_VERSION := $(shell dh_testdir && \
 		dpkg-parsechangelog -c1 < debian/changelog | \
 		sed -rn 's/^Version: ?//p')
diff --git a/lib/command_match.c b/lib/command_match.c
index 24e850ad2..31b351e3f 100644
--- a/lib/command_match.c
+++ b/lib/command_match.c
@@ -403,6 +403,7 @@ enum matcher_rv command_complete(struct graph *graph, vector vline,
 				trace_matcher("trivial_match\n");
 				if (exact_match_exists && !last_token)
 					break;
+				/* fallthru */
 			case exact_match:
 				trace_matcher("exact_match\n");
 				if (last_token) {
diff --git a/lib/csv.c b/lib/csv.c
index eadaaa371..fe6751c97 100644
--- a/lib/csv.c
+++ b/lib/csv.c
@@ -420,7 +420,7 @@ void csv_clone_record(csv_t *csv, csv_record_t *in_rec, csv_record_t **out_rec)
 
 void csv_remove_record(csv_t *csv, csv_record_t *rec)
 {
-	csv_field_t *fld, *p_fld;
+	csv_field_t *fld = NULL, *p_fld;
 
 	/* first check if rec belongs to this csv */
 	if (!csv_is_record_valid(csv, rec)) {
diff --git a/lib/jhash.c b/lib/jhash.c
index 8b646b8e2..729b74386 100644
--- a/lib/jhash.c
+++ b/lib/jhash.c
@@ -86,24 +86,34 @@ u_int32_t jhash(const void *key, u_int32_t length, u_int32_t initval)
 	switch (len) {
 	case 11:
 		c += ((u_int32_t)k[10] << 24);
+		/* fallthru */
 	case 10:
 		c += ((u_int32_t)k[9] << 16);
+		/* fallthru */
 	case 9:
 		c += ((u_int32_t)k[8] << 8);
+		/* fallthru */
 	case 8:
 		b += ((u_int32_t)k[7] << 24);
+		/* fallthru */
 	case 7:
 		b += ((u_int32_t)k[6] << 16);
+		/* fallthru */
 	case 6:
 		b += ((u_int32_t)k[5] << 8);
+		/* fallthru */
 	case 5:
 		b += k[4];
+		/* fallthru */
 	case 4:
 		a += ((u_int32_t)k[3] << 24);
+		/* fallthru */
 	case 3:
 		a += ((u_int32_t)k[2] << 16);
+		/* fallthru */
 	case 2:
 		a += ((u_int32_t)k[1] << 8);
+		/* fallthru */
 	case 1:
 		a += k[0];
 	};
@@ -138,6 +148,7 @@ u_int32_t jhash2(const u_int32_t *k, u_int32_t length, u_int32_t initval)
 	switch (len) {
 	case 2:
 		b += k[1];
+		/* fallthru */
 	case 1:
 		a += k[0];
 	};
diff --git a/lib/workqueue.c b/lib/workqueue.c
index 1789c6b7d..118bfced5 100644
--- a/lib/workqueue.c
+++ b/lib/workqueue.c
@@ -320,7 +320,7 @@ int work_queue_run(struct thread *thread)
 			if (wq->spec.errorfunc)
 				wq->spec.errorfunc(wq, item);
 		}
-		/* fall through here is deliberate */
+		/* fallthru */
 		case WQ_SUCCESS:
 		default: {
 			work_queue_item_remove(wq, node);
diff --git a/nhrpd/nhrp_packet.c b/nhrpd/nhrp_packet.c
index 36dbdfd77..0ba3f33d0 100644
--- a/nhrpd/nhrp_packet.c
+++ b/nhrpd/nhrp_packet.c
@@ -244,6 +244,7 @@ int nhrp_ext_reply(struct zbuf *zb, struct nhrp_packet_header *hdr, struct inter
 	default:
 		if (type & NHRP_EXTENSION_FLAG_COMPULSORY)
 			goto err;
+		/* fallthru */
 	case NHRP_EXTENSION_FORWARD_TRANSIT_NHS:
 	case NHRP_EXTENSION_REVERSE_TRANSIT_NHS:
 		/* Supported compulsory extensions, and any
diff --git a/nhrpd/nhrp_peer.c b/nhrpd/nhrp_peer.c
index 3cc91a908..06d48a2d1 100644
--- a/nhrpd/nhrp_peer.c
+++ b/nhrpd/nhrp_peer.c
@@ -134,7 +134,7 @@ static void nhrp_peer_ifp_notify(struct notifier_block *n, unsigned long cmd)
 			nhrp_vc_notify_add(p->vc, &p->vc_notifier, nhrp_peer_vc_notify);
 			__nhrp_peer_check(p);
 		}
-		/* Fall-through to post config update */
+		/* fallthru */
 	case NOTIFY_INTERFACE_ADDRESS_CHANGED:
 		notifier_call(&p->notifier_list, NOTIFY_PEER_IFCONFIG_CHANGED);
 		break;
@@ -687,6 +687,7 @@ static void nhrp_peer_forward(struct nhrp_peer *p, struct nhrp_packet_parser *pp
 				/* FIXME: RFC says to just copy, but not
 				 * append our selves to the transit NHS list */
 				goto err;
+			/* fallthru */
 		case NHRP_EXTENSION_RESPONDER_ADDRESS:
 			/* Supported compulsory extensions, and any
 			 * non-compulsory that is not explicitly handled,
@@ -849,6 +850,7 @@ void nhrp_peer_recv(struct nhrp_peer *p, struct zbuf *zb)
 				/* FIXME: send error-indication */
 			}
 		}
+		/* fallthru */
 	case NHRP_ROUTE_OFF_NBMA:
 		if (packet_types[hdr->type].handler) {
 			packet_types[hdr->type].handler(&pp);
diff --git a/ospf6d/ospf6_intra.c b/ospf6d/ospf6_intra.c
index a19c3f407..79674b72d 100644
--- a/ospf6d/ospf6_intra.c
+++ b/ospf6d/ospf6_intra.c
@@ -1446,7 +1446,7 @@ static void ospf6_brouter_debug_print(struct ospf6_route *brouter)
 	char brouter_name[16];
 	char area_name[16];
 	char destination[64];
-	char installed[16], changed[16];
+	char installed[64], changed[64];
 	struct timeval now, res;
 	char id[16], adv_router[16];
 	char capa[16], options[16];
diff --git a/ospf6d/ospf6_lsa.c b/ospf6d/ospf6_lsa.c
index 0e10ab15e..f4b2f4090 100644
--- a/ospf6d/ospf6_lsa.c
+++ b/ospf6d/ospf6_lsa.c
@@ -468,7 +468,7 @@ void ospf6_lsa_show(struct vty *vty, struct ospf6_lsa *lsa)
 	char adv_router[64], id[64];
 	struct ospf6_lsa_handler *handler;
 	struct timeval now, res;
-	char duration[16];
+	char duration[64];
 
 	assert(lsa && lsa->header);
 
diff --git a/ospf6d/ospf6_message.c b/ospf6d/ospf6_message.c
index 93c85b58d..3da455e79 100644
--- a/ospf6d/ospf6_message.c
+++ b/ospf6d/ospf6_message.c
@@ -369,7 +369,7 @@ static void ospf6_dbdesc_recv_master(struct ospf6_header *oh,
 			return;
 		}
 	/* else fall through to ExStart */
-
+	/* fallthru */
 	case OSPF6_NEIGHBOR_EXSTART:
 		/* if neighbor obeys us as our slave, schedule negotiation_done
 		   and process LSA Headers. Otherwise, ignore this message */
@@ -565,7 +565,7 @@ static void ospf6_dbdesc_recv_slave(struct ospf6_header *oh,
 			return;
 		}
 	/* else fall through to ExStart */
-
+	/* fallthru */
 	case OSPF6_NEIGHBOR_EXSTART:
 		/* If the neighbor is Master, act as Slave. Schedule
 		   negotiation_done
diff --git a/ospf6d/ospf6_neighbor.c b/ospf6d/ospf6_neighbor.c
index b7fd20cb8..9693c4b05 100644
--- a/ospf6d/ospf6_neighbor.c
+++ b/ospf6d/ospf6_neighbor.c
@@ -587,10 +587,10 @@ int inactivity_timer(struct thread *thread)
 static void ospf6_neighbor_show(struct vty *vty, struct ospf6_neighbor *on)
 {
 	char router_id[16];
-	char duration[16];
+	char duration[64];
 	struct timeval res;
 	char nstate[16];
-	char deadtime[16];
+	char deadtime[64];
 	long h, m, s;
 
 	/* Router-ID (Name) */
@@ -645,7 +645,7 @@ static void ospf6_neighbor_show_drchoice(struct vty *vty,
 {
 	char router_id[16];
 	char drouter[16], bdrouter[16];
-	char duration[16];
+	char duration[64];
 	struct timeval now, res;
 
 	/*
diff --git a/ospf6d/ospf6_route.c b/ospf6d/ospf6_route.c
index 88dd7b218..1c414b35c 100644
--- a/ospf6d/ospf6_route.c
+++ b/ospf6d/ospf6_route.c
@@ -43,7 +43,7 @@ unsigned char conf_debug_ospf6_route = 0;
 
 static char *ospf6_route_table_name(struct ospf6_route_table *table)
 {
-	static char name[32];
+	static char name[64];
 	switch (table->scope_type) {
 	case OSPF6_SCOPE_TYPE_GLOBAL: {
 		switch (table->table_type) {
@@ -946,7 +946,7 @@ void ospf6_route_show(struct vty *vty, struct ospf6_route *route)
 {
 	int i;
 	char destination[PREFIX2STR_BUFFER], nexthop[64];
-	char duration[16];
+	char duration[64];
 	const char *ifname;
 	struct timeval now, res;
 	struct listnode *node;
@@ -992,7 +992,7 @@ void ospf6_route_show_detail(struct vty *vty, struct ospf6_route *route)
 	char destination[PREFIX2STR_BUFFER], nexthop[64];
 	char area_id[16], id[16], adv_router[16], capa[16], options[16];
 	struct timeval now, res;
-	char duration[16];
+	char duration[64];
 	struct listnode *node;
 	struct ospf6_nexthop *nh;
 
diff --git a/ospf6d/ospf6_snmp.c b/ospf6d/ospf6_snmp.c
index 3affa12a9..e7b93b638 100644
--- a/ospf6d/ospf6_snmp.c
+++ b/ospf6d/ospf6_snmp.c
@@ -712,7 +712,8 @@ static u_char *ospfv3GeneralGroup(struct variable *v, oid *name, size_t *length,
 	case OSPFv3REFERENCEBANDWIDTH:
 		if (ospf6)
 			return SNMP_INTEGER(ospf6->ref_bandwidth);
-	/* Otherwise, like for "not implemented". */
+		/* Otherwise, like for "not implemented". */
+		/* fallthru */
 	case OSPFv3RESTARTSUPPORT:
 	case OSPFv3RESTARTINTERVAL:
 	case OSPFv3RESTARTSTRICTLSACHECKING:
diff --git a/ospfd/ospf_interface.c b/ospfd/ospf_interface.c
index ad501f688..24fe8ac72 100644
--- a/ospfd/ospf_interface.c
+++ b/ospfd/ospf_interface.c
@@ -988,6 +988,7 @@ static int ospf_vl_set_params(struct ospf_vl_data *vl_data, struct vertex *v)
 				if (IS_DEBUG_OSPF_EVENT)
 					zlog_debug(
 						"found back link through VL");
+				/* fallthru */
 			case LSA_LINK_TYPE_TRANSIT:
 			case LSA_LINK_TYPE_POINTOPOINT:
 				if (!IPV4_ADDR_SAME(&vl_data->peer_addr,
diff --git a/ospfd/ospf_nsm.c b/ospfd/ospf_nsm.c
index a112f7095..201e725cf 100644
--- a/ospfd/ospf_nsm.c
+++ b/ospfd/ospf_nsm.c
@@ -110,6 +110,7 @@ static void nsm_timer_set(struct ospf_neighbor *nbr)
 	case NSM_Down:
 		OSPF_NSM_TIMER_OFF(nbr->t_inactivity);
 		OSPF_NSM_TIMER_OFF(nbr->t_hello_reply);
+		/* fallthru */
 	case NSM_Attempt:
 	case NSM_Init:
 	case NSM_TwoWay:
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index df7bac4db..a0393652a 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -1129,6 +1129,7 @@ static void ospf_db_desc_proc(struct stream *s, struct ospf_interface *oi,
 			/* Neighbour has a more recent LSA, we must request it
 			 */
 			ospf_ls_request_add(nbr, new);
+			/* fallthru */
 		case 0:
 			/* If we have a copy of this LSA, it's either less
 			 * recent
@@ -1310,6 +1311,7 @@ static void ospf_db_desc(struct ip *iph, struct ospf_header *ospfh,
 		   through to case ExStart below.  */
 		if (nbr->state != NSM_ExStart)
 			break;
+		/* fallthru */
 	case NSM_ExStart:
 		/* Initial DBD */
 		if ((IS_SET_DD_ALL(dd->flags) == OSPF_DD_FLAG_ALL)
diff --git a/zebra/test_main.c b/zebra/test_main.c
index 69fc5fd40..3d277dbaf 100644
--- a/zebra/test_main.c
+++ b/zebra/test_main.c
@@ -223,6 +223,7 @@ int main(int argc, char **argv)
 			break;
 		case 'b':
 			batch_mode = 1;
+			break;
 		case 'd':
 			daemon_mode = 1;
 			break;