2 * l2_input.c : layer 2 input packet processing
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/ethernet/packet.h>
23 #include <vnet/ip/ip_packet.h>
24 #include <vnet/ip/ip4_packet.h>
25 #include <vnet/ip/ip6_packet.h>
26 #include <vnet/fib/fib_node.h>
27 #include <vnet/ethernet/arp_packet.h>
29 #include <vnet/l2/l2_input.h>
30 #include <vnet/l2/l2_output.h>
31 #include <vnet/l2/feat_bitmap.h>
32 #include <vnet/l2/l2_bvi.h>
33 #include <vnet/l2/l2_fib.h>
34 #include <vnet/l2/l2_bd.h>
36 #include <vppinfra/error.h>
37 #include <vppinfra/hash.h>
38 #include <vppinfra/cache.h>
42 * @brief Interface Input Mode (Layer 2 Cross-Connect or Bridge / Layer 3).
44 * This file contains the CLI Commands that modify the input mode of an
45 * interface. For interfaces in a Layer 2 cross-connect, all packets
46 * received on one interface will be transmitted to the other. For
47 * interfaces in a bridge-domain, packets will be forwarded to other
48 * interfaces in the same bridge-domain based on destination mac address.
49 * For interfaces in Layer 3 mode, the packets will be routed.
52 /* Feature graph node names */
53 static char *l2input_feat_names[] = {
54 #define _(sym,name) name,
60 l2input_get_feat_names (void)
62 return l2input_feat_names;
66 format_l2_input_features (u8 * s, va_list * args)
68 static char *display_names[] = {
69 #define _(sym,name) #sym,
73 u32 feature_bitmap = va_arg (*args, u32);
75 if (feature_bitmap == 0)
77 s = format (s, " none configured");
81 feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */
83 for (i = L2INPUT_N_FEAT; i >= 0; i--)
84 if (feature_bitmap & (1 << i))
85 s = format (s, "%10s (%s)\n", display_names[i], l2input_feat_names[i]);
91 /* per-pkt trace data */
98 /* packet trace format function */
100 format_l2input_trace (u8 * s, va_list * args)
102 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
103 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
104 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
106 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
108 format_ethernet_address, t->dst,
109 format_ethernet_address, t->src);
113 l2input_main_t l2input_main;
115 #define foreach_l2input_error \
116 _(L2INPUT, "L2 input packets") \
117 _(DROP, "L2 input drops")
121 #define _(sym,str) L2INPUT_ERROR_##sym,
122 foreach_l2input_error
127 static char *l2input_error_strings[] = {
128 #define _(sym,string) string,
129 foreach_l2input_error
142 static_always_inline void
143 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
146 * Load L2 input feature struct
147 * Load bridge domain struct
148 * Parse ethernet header to determine unicast/mcast/broadcast
150 * classify packet as IP/UDP/TCP, control, other
151 * mask feature bitmap
152 * go to first node in bitmap
153 * Later: optimize VTM
156 * set tx sw-if-handle
160 u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
161 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
163 /* Get config for the input interface */
164 l2_input_config_t *config = vec_elt_at_index (msm->configs, sw_if_index0);
166 /* Save split horizon group */
167 vnet_buffer (b0)->l2.shg = config->shg;
169 /* determine layer2 kind for stat and mask */
170 if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address)))
172 u8 *l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
174 #define get_u16(addr) ( *((u16 *)(addr)) )
175 u16 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
176 u8 protocol = ((ip6_header_t *) l3h0)->protocol;
178 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
179 feat_mask &= ~(L2INPUT_FEAT_FWD |
180 L2INPUT_FEAT_UU_FLOOD | L2INPUT_FEAT_GBP_FWD);
182 /* Disable ARP-term for non-ARP and non-ICMP6 packet */
183 if (ethertype != ETHERNET_TYPE_ARP &&
184 (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6))
185 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
188 * For packet from BVI - set SHG of ARP request or ICMPv6 neighbor
189 * solicitation packet from BVI to 0 so it can also flood to VXLAN
190 * tunnels or other ports with the same SHG as that of the BVI.
192 else if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
195 if (ethertype == ETHERNET_TYPE_ARP)
197 ethernet_arp_header_t *arp0 = (ethernet_arp_header_t *) l3h0;
199 clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request))
200 vnet_buffer (b0)->l2.shg = 0;
202 else /* must be ICMPv6 */
204 ip6_header_t *iph0 = (ip6_header_t *) l3h0;
205 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh0;
206 ndh0 = ip6_next_header (iph0);
207 if (ndh0->icmp.type == ICMP6_neighbor_solicitation)
208 vnet_buffer (b0)->l2.shg = 0;
215 * For packet from BVI - set SHG of unicast packet from BVI to 0 so it
216 * is not dropped on output to VXLAN tunnels or other ports with the
217 * same SHG as that of the BVI.
219 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
221 vnet_buffer (b0)->l2.shg = 0;
227 /* Do bridge-domain processing */
228 u16 bd_index0 = config->bd_index;
229 /* save BD ID for next feature graph nodes */
230 vnet_buffer (b0)->l2.bd_index = bd_index0;
232 /* Get config for the bridge domain interface */
233 l2_bridge_domain_t *bd_config =
234 vec_elt_at_index (msm->bd_configs, bd_index0);
236 /* Save bridge domain and interface seq_num */
238 l2fib_seq_num_t sn = {
239 .swif = *l2fib_swif_seq_num(sw_if_index0),
240 .bd = bd_config->seq_num,
243 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
244 vnet_buffer (b0)->l2.bd_age = bd_config->mac_age;
247 * Process bridge domain feature enables.
248 * To perform learning/flooding/forwarding, the corresponding bit
249 * must be enabled in both the input interface config and in the
250 * bridge domain config. In the bd_bitmap, bits for features other
251 * than learning/flooding/forwarding should always be set.
253 feat_mask = feat_mask & bd_config->feature_bitmap;
255 else if (config->xconnect)
257 /* Set the output interface */
258 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
261 feat_mask = L2INPUT_FEAT_DROP;
263 /* mask out features from bitmap using packet type and bd config */
264 u32 feature_bitmap = config->feature_bitmap & feat_mask;
266 /* save for next feature graph nodes */
267 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
269 /* Determine the next node */
270 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
274 static_always_inline uword
275 l2input_node_inline (vlib_main_t * vm,
276 vlib_node_runtime_t * node, vlib_frame_t * frame,
279 u32 n_left_from, *from, *to_next;
280 l2input_next_t next_index;
281 l2input_main_t *msm = &l2input_main;
283 from = vlib_frame_vector_args (frame);
284 n_left_from = frame->n_vectors; /* number of packets to process */
285 next_index = node->cached_next_index;
287 while (n_left_from > 0)
291 /* get space to enqueue frame to graph node "next_index" */
292 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
294 while (n_left_from >= 8 && n_left_to_next >= 4)
296 u32 bi0, bi1, bi2, bi3;
297 vlib_buffer_t *b0, *b1, *b2, *b3;
298 u32 next0, next1, next2, next3;
299 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
301 /* Prefetch next iteration. */
303 vlib_buffer_t *p4, *p5, *p6, *p7;
305 p4 = vlib_get_buffer (vm, from[4]);
306 p5 = vlib_get_buffer (vm, from[5]);
307 p6 = vlib_get_buffer (vm, from[6]);
308 p7 = vlib_get_buffer (vm, from[7]);
310 /* Prefetch the buffer header and packet for the N+2 loop iteration */
311 vlib_prefetch_buffer_header (p4, LOAD);
312 vlib_prefetch_buffer_header (p5, LOAD);
313 vlib_prefetch_buffer_header (p6, LOAD);
314 vlib_prefetch_buffer_header (p7, LOAD);
316 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
317 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
318 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
319 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
322 * Don't bother prefetching the bridge-domain config (which
323 * depends on the input config above). Only a small number of
324 * bridge domains are expected. Plus the structure is small
325 * and several fit in a cache line.
329 /* speculatively enqueue b0 and b1 to the current next frame */
330 /* bi is "buffer index", b is pointer to the buffer */
331 to_next[0] = bi0 = from[0];
332 to_next[1] = bi1 = from[1];
333 to_next[2] = bi2 = from[2];
334 to_next[3] = bi3 = from[3];
340 b0 = vlib_get_buffer (vm, bi0);
341 b1 = vlib_get_buffer (vm, bi1);
342 b2 = vlib_get_buffer (vm, bi2);
343 b3 = vlib_get_buffer (vm, bi3);
347 /* RX interface handles */
348 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
349 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
350 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
351 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
353 if (b0->flags & VLIB_BUFFER_IS_TRACED)
355 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
357 vlib_add_trace (vm, node, b0, sizeof (*t));
358 t->sw_if_index = sw_if_index0;
359 clib_memcpy (t->src, h0->src_address, 6);
360 clib_memcpy (t->dst, h0->dst_address, 6);
362 if (b1->flags & VLIB_BUFFER_IS_TRACED)
364 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
366 vlib_add_trace (vm, node, b1, sizeof (*t));
367 t->sw_if_index = sw_if_index1;
368 clib_memcpy (t->src, h1->src_address, 6);
369 clib_memcpy (t->dst, h1->dst_address, 6);
371 if (b2->flags & VLIB_BUFFER_IS_TRACED)
373 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
375 vlib_add_trace (vm, node, b2, sizeof (*t));
376 t->sw_if_index = sw_if_index2;
377 clib_memcpy (t->src, h2->src_address, 6);
378 clib_memcpy (t->dst, h2->dst_address, 6);
380 if (b3->flags & VLIB_BUFFER_IS_TRACED)
382 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
384 vlib_add_trace (vm, node, b3, sizeof (*t));
385 t->sw_if_index = sw_if_index3;
386 clib_memcpy (t->src, h3->src_address, 6);
387 clib_memcpy (t->dst, h3->dst_address, 6);
391 classify_and_dispatch (msm, b0, &next0);
392 classify_and_dispatch (msm, b1, &next1);
393 classify_and_dispatch (msm, b2, &next2);
394 classify_and_dispatch (msm, b3, &next3);
396 /* verify speculative enqueues, maybe switch current next frame */
397 /* if next0==next1==next_index then nothing special needs to be done */
398 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
399 to_next, n_left_to_next,
401 next0, next1, next2, next3);
404 while (n_left_from > 0 && n_left_to_next > 0)
411 /* speculatively enqueue b0 to the current next frame */
419 b0 = vlib_get_buffer (vm, bi0);
421 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
423 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
424 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
425 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
426 t->sw_if_index = sw_if_index0;
427 clib_memcpy (t->src, h0->src_address, 6);
428 clib_memcpy (t->dst, h0->dst_address, 6);
431 classify_and_dispatch (msm, b0, &next0);
433 /* verify speculative enqueue, maybe switch current next frame */
434 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
435 to_next, n_left_to_next,
439 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
442 vlib_node_increment_counter (vm, l2input_node.index,
443 L2INPUT_ERROR_L2INPUT, frame->n_vectors);
445 return frame->n_vectors;
449 l2input_node_fn (vlib_main_t * vm,
450 vlib_node_runtime_t * node, vlib_frame_t * frame)
452 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
453 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
454 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
458 VLIB_REGISTER_NODE (l2input_node) = {
459 .function = l2input_node_fn,
461 .vector_size = sizeof (u32),
462 .format_trace = format_l2input_trace,
463 .format_buffer = format_ethernet_header_with_length,
464 .type = VLIB_NODE_TYPE_INTERNAL,
466 .n_errors = ARRAY_LEN(l2input_error_strings),
467 .error_strings = l2input_error_strings,
469 .n_next_nodes = L2INPUT_N_NEXT,
471 /* edit / add dispositions here */
473 [L2INPUT_NEXT_LEARN] = "l2-learn",
474 [L2INPUT_NEXT_FWD] = "l2-fwd",
475 [L2INPUT_NEXT_DROP] = "error-drop",
480 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
481 clib_error_t *l2input_init (vlib_main_t * vm)
483 l2input_main_t *mp = &l2input_main;
486 mp->vnet_main = vnet_get_main ();
488 /* Get packets RX'd from L2 interfaces */
489 ethernet_register_l2_input (vm, l2input_node.index);
491 /* Create the config vector */
492 vec_validate (mp->configs, 100);
493 /* create 100 sw interface entries and zero them */
495 /* Initialize the feature next-node indexes */
496 feat_bitmap_init_next_nodes (vm,
499 l2input_get_feat_names (),
500 mp->feat_next_node_index);
505 VLIB_INIT_FUNCTION (l2input_init);
508 /** Get a pointer to the config for the given interface. */
510 l2input_intf_config (u32 sw_if_index)
512 l2input_main_t *mp = &l2input_main;
514 vec_validate (mp->configs, sw_if_index);
515 return vec_elt_at_index (mp->configs, sw_if_index);
518 /** Enable (or disable) the feature in the bitmap for the given interface. */
520 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable)
522 l2_input_config_t *config = l2input_intf_config (sw_if_index);
525 config->feature_bitmap |= feature_bitmap;
527 config->feature_bitmap &= ~feature_bitmap;
529 return config->feature_bitmap;
533 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
535 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
536 bd_validate (bd_config);
537 bd_config->feature_bitmap =
538 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
539 return bd_config->feature_bitmap;
543 * Set the subinterface to run in l2 or l3 mode.
544 * For L3 mode, just the sw_if_index is specified.
545 * For bridged mode, the bd id and bvi flag are also specified.
546 * For xconnect mode, the peer sw_if_index is also specified.
547 * Return 0 if ok, or non-0 if there was an error.
551 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
552 u32 mode, /* One of L2 modes or back to L3 mode */
553 u32 sw_if_index, /* sw interface index */
554 u32 bd_index, /* for bridged interface */
555 u32 bvi, /* the bridged interface is the BVI */
556 u32 shg, /* the bridged interface split horizon group */
557 u32 xc_sw_if_index) /* peer interface for xconnect */
559 l2input_main_t *mp = &l2input_main;
560 l2output_main_t *l2om = &l2output_main;
561 vnet_main_t *vnm = vnet_get_main ();
562 vnet_hw_interface_t *hi;
563 l2_output_config_t *out_config;
564 l2_input_config_t *config;
565 l2_bridge_domain_t *bd_config;
566 i32 l2_if_adjust = 0;
567 vnet_device_class_t *dev_class;
569 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
570 config = l2input_intf_config (sw_if_index);
574 /* Interface is already in bridge mode. Undo the existing config. */
575 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
577 /* remove interface from flood vector */
578 bd_remove_member (bd_config, sw_if_index);
580 /* undo any BVI-related config */
581 if (bd_config->bvi_sw_if_index == sw_if_index)
583 vnet_sw_interface_t *si;
585 bd_config->bvi_sw_if_index = ~0;
588 /* delete the l2fib entry for the bvi interface */
589 l2fib_del_entry (hi->hw_address, config->bd_index, sw_if_index);
591 /* since this is a no longer BVI interface do not to flood to it */
592 si = vnet_get_sw_interface (vnm, sw_if_index);
593 si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD;
596 /* Clear MACs learned on the interface */
597 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
598 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
599 l2fib_flush_int_mac (vm, sw_if_index);
603 else if (config->xconnect)
608 /* Make sure vector is big enough */
609 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
612 /* Initialize the l2-input configuration for the interface */
615 /* Set L2 config to BD index 0 so that if any packet accidentally
616 * came in on L2 path, it will be dropped in BD 0 */
617 config->xconnect = 0;
620 config->bd_index = 0;
621 config->feature_bitmap = L2INPUT_FEAT_DROP;
623 /* Clear L2 output config */
624 out_config = l2output_intf_config (sw_if_index);
625 memset (out_config, 0, sizeof (l2_output_config_t));
627 /* Make sure any L2-output packet to this interface now in L3 mode is
628 * dropped. This may happen if L2 FIB MAC entry is stale */
629 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
633 /* Add or update l2-output node next-arc and output_node_index_vec table
634 * for the interface */
635 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
637 if (mode == MODE_L2_BRIDGE)
640 * Remove a check that the interface must be an Ethernet.
641 * Specifically so we can bridge to L3 tunnel interfaces.
643 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
647 return MODE_ERROR_ETH; /* non-ethernet */
649 config->xconnect = 0;
651 config->bd_index = bd_index;
652 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
655 * Enable forwarding, flooding, learning and ARP termination by default
656 * (note that ARP term is disabled on BD feature bitmap by default)
658 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
659 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
661 /* Make sure last-chance drop is configured */
662 config->feature_bitmap |= L2INPUT_FEAT_DROP;
664 /* Make sure xconnect is disabled */
665 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
667 /* Set up bridge domain */
668 bd_config = l2input_bd_config (bd_index);
669 bd_validate (bd_config);
671 /* TODO: think: add l2fib entry even for non-bvi interface? */
673 /* Do BVI interface initializations */
676 vnet_sw_interface_t *si;
678 /* ensure BD has no bvi interface (or replace that one with this??) */
679 if (bd_config->bvi_sw_if_index != ~0)
681 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
683 bd_config->bvi_sw_if_index = sw_if_index;
686 /* create the l2fib entry for the bvi interface */
687 l2fib_add_fwd_entry (hi->hw_address, bd_index, sw_if_index, 1, 1); /* static + bvi */
689 /* Disable learning by default. no use since l2fib entry is static. */
690 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
692 /* since this is a BVI interface we want to flood to it */
693 si = vnet_get_sw_interface (vnm, sw_if_index);
694 si->flood_class = VNET_FLOOD_CLASS_BVI;
697 /* Add interface to bridge-domain flood vector */
698 l2_flood_member_t member = {
699 .sw_if_index = sw_if_index,
700 .flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL,
703 bd_add_member (bd_config, &member);
706 else if (mode == MODE_L2_XC)
708 config->xconnect = 1;
710 config->output_sw_if_index = xc_sw_if_index;
712 /* Make sure last-chance drop is configured */
713 config->feature_bitmap |= L2INPUT_FEAT_DROP;
715 /* Make sure bridging features are disabled */
716 config->feature_bitmap &=
717 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
719 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
720 shg = 0; /* not used in xconnect */
722 else if (mode == MODE_L2_CLASSIFY)
724 config->xconnect = 1;
726 config->output_sw_if_index = xc_sw_if_index;
728 /* Make sure last-chance drop is configured */
729 config->feature_bitmap |=
730 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
732 /* Make sure bridging features are disabled */
733 config->feature_bitmap &=
734 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
735 shg = 0; /* not used in xconnect */
737 /* Insure all packets go to ethernet-input */
738 ethernet_set_rx_redirect (vnet_main, hi, 1);
741 /* set up split-horizon group and set output feature bit */
743 out_config = l2output_intf_config (sw_if_index);
744 out_config->shg = shg;
745 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
748 * Test: remove this when non-IP features can be configured.
749 * Enable a non-IP feature to test IP feature masking
750 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
756 /* Adjust count of L2 interfaces */
757 hi->l2_if_count += l2_if_adjust;
759 if (hi->hw_class_index == ethernet_hw_interface_class.index)
761 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
763 /* Just added first L2 interface on this port */
765 /* Set promiscuous mode on the l2 interface */
766 ethernet_set_flags (vnet_main, hi->hw_if_index,
767 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
769 /* ensure all packets go to ethernet-input */
770 ethernet_set_rx_redirect (vnet_main, hi, 1);
773 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
775 /* Just removed only L2 subinterface on this port */
777 /* Disable promiscuous mode on the l2 interface */
778 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
780 /* Allow ip packets to go directly to ip4-input etc */
781 ethernet_set_rx_redirect (vnet_main, hi, 0);
785 /* Set up the L2/L3 flag in the interface parsing tables */
786 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
788 dev_class = vnet_get_device_class (vnet_main, hi->dev_class_index);
789 if (dev_class->set_l2_mode_function)
791 dev_class->set_l2_mode_function (vnet_main, hi, l2_if_adjust);
798 * Set subinterface in bridging mode with a bridge-domain ID.
800 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
802 static clib_error_t *
803 int_l2_bridge (vlib_main_t * vm,
804 unformat_input_t * input, vlib_cli_command_t * cmd)
806 vnet_main_t *vnm = vnet_get_main ();
807 clib_error_t *error = 0;
814 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
816 error = clib_error_return (0, "unknown interface `%U'",
817 format_unformat_error, input);
821 if (!unformat (input, "%d", &bd_id))
823 error = clib_error_return (0, "expected bridge domain ID `%U'",
824 format_unformat_error, input);
828 if (bd_id > L2_BD_ID_MAX)
830 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
831 format_unformat_error, input);
834 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
837 bvi = unformat (input, "bvi");
839 /* optional split horizon group */
841 (void) unformat (input, "%d", &shg);
843 /* set the interface mode */
845 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi,
848 if (rc == MODE_ERROR_ETH)
850 error = clib_error_return (0, "bridged interface must be ethernet",
851 format_unformat_error, input);
853 else if (rc == MODE_ERROR_BVI_DEF)
856 clib_error_return (0, "bridge-domain already has a bvi interface",
857 format_unformat_error, input);
861 error = clib_error_return (0, "invalid configuration for interface",
862 format_unformat_error, input);
872 * Use this command put an interface into Layer 2 bridge domain. If a
873 * bridge-domain with the provided bridge-domain-id does not exist, it
874 * will be created. Interfaces in a bridge-domain forward packets to
875 * other interfaces in the same bridge-domain based on destination mac
876 * address. To remove an interface from a the Layer 2 bridge domain,
877 * put the interface in a different mode, for example Layer 3 mode.
879 * Optionally, an interface can be added to a Layer 2 bridge-domain as
880 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
881 * bridge-domain can be a bvi.
883 * Optionally, a split-horizon group can also be specified. This defaults
884 * to 0 if not specified.
887 * Example of how to configure a Layer 2 bridge-domain with three
888 * interfaces (where 200 is the bridge-domain-id):
889 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
890 * This interface is added a BVI interface:
891 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
892 * This interface also has a split-horizon group of 1 specified:
893 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
894 * Example of how to remove an interface from a Layer2 bridge-domain:
895 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
898 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
899 .path = "set interface l2 bridge",
900 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]",
901 .function = int_l2_bridge,
906 * Set subinterface in xconnect mode with another interface.
908 * set interface l2 xconnect <interface> <peer interface>
910 static clib_error_t *
911 int_l2_xc (vlib_main_t * vm,
912 unformat_input_t * input, vlib_cli_command_t * cmd)
914 vnet_main_t *vnm = vnet_get_main ();
915 clib_error_t *error = 0;
919 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
921 error = clib_error_return (0, "unknown interface `%U'",
922 format_unformat_error, input);
927 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
929 error = clib_error_return (0, "unknown peer interface `%U'",
930 format_unformat_error, input);
934 /* set the interface mode */
936 (vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index))
938 error = clib_error_return (0, "invalid configuration for interface",
939 format_unformat_error, input);
948 * Use this command put an interface into Layer 2 cross-connect mode.
949 * Both interfaces must be in this mode for bi-directioal traffic. All
950 * packets received on one interface will be transmitted to the other.
951 * To remove the Layer 2 cross-connect, put the interface in a different
952 * mode, for example Layer 3 mode.
955 * Example of how to configure a Layer2 cross-connect between two interfaces:
956 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
957 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
958 * Example of how to remove a Layer2 cross-connect:
959 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
960 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
963 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
964 .path = "set interface l2 xconnect",
965 .short_help = "set interface l2 xconnect <interface> <peer interface>",
966 .function = int_l2_xc,
971 * Set subinterface in L3 mode.
973 * set interface l3 <interface>
975 static clib_error_t *
976 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
978 vnet_main_t *vnm = vnet_get_main ();
979 clib_error_t *error = 0;
982 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
984 error = clib_error_return (0, "unknown interface `%U'",
985 format_unformat_error, input);
989 /* set the interface mode */
990 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0))
992 error = clib_error_return (0, "invalid configuration for interface",
993 format_unformat_error, input);
1002 * Modify the packet processing mode of the interface to Layer 3, which
1003 * implies packets will be routed. This is the default mode of an interface.
1004 * Use this command to remove an interface from a Layer 2 cross-connect or a
1008 * Example of how to set the mode of an interface to Layer 3:
1009 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
1012 VLIB_CLI_COMMAND (int_l3_cli, static) = {
1013 .path = "set interface l3",
1014 .short_help = "set interface l3 <interface>",
1020 * Show interface mode.
1021 * The CLI format is:
1022 * show mode [<if-name1> <if-name2> ...]
1024 static clib_error_t *
1025 show_int_mode (vlib_main_t * vm,
1026 unformat_input_t * input, vlib_cli_command_t * cmd)
1028 vnet_main_t *vnm = vnet_get_main ();
1029 clib_error_t *error = 0;
1032 vnet_interface_main_t *im = &vnm->interface_main;
1034 vnet_sw_interface_t *si, *sis = 0;
1035 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1039 /* See if user wants to show specific interface */
1041 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1043 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1044 vec_add1 (sis, si[0]);
1048 error = clib_error_return (0, "unknown input `%U'",
1049 format_unformat_error, input);
1054 if (vec_len (sis) == 0) /* Get all interfaces */
1056 /* Gather interfaces. */
1057 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1060 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1064 vec_foreach (si, sis)
1066 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1071 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1073 args = format (0, "bd_id %d%s%d", bd_id,
1074 config->bvi ? " bvi shg " : " shg ", config->shg);
1076 else if (config->xconnect)
1078 mode = "l2 xconnect";
1079 args = format (0, "%U",
1080 format_vnet_sw_if_index_name,
1081 vnm, config->output_sw_if_index);
1086 args = format (0, " ");
1088 vlib_cli_output (vm, "%s %U %v\n",
1090 format_vnet_sw_if_index_name,
1091 vnm, si->sw_if_index, args);
1102 * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge,
1103 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1104 * output to just the provided list of interfaces and sub-interfaces.
1105 * The output shows the mode, the interface, and if the interface is
1106 * a member of a bridge, the bridge-domain-id and the split horizen group (shg).
1109 * Example of displaying the mode of all interfaces:
1110 * @cliexstart{show mode}
1112 * l3 GigabitEthernet0/8/0
1113 * l3 GigabitEthernet0/9/0
1114 * l3 GigabitEthernet0/a/0
1115 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1116 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1117 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1118 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1119 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1121 * Example of displaying the mode of a seleted list of interfaces:
1122 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1123 * l3 GigabitEthernet0/8/0
1124 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1128 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1129 .path = "show mode",
1130 .short_help = "show mode [<if-name1> <if-name2> ...]",
1131 .function = show_int_mode,
1135 #define foreach_l2_init_function \
1136 _(feat_bitmap_drop_init) \
1138 _(l2_input_classify_init) \
1141 _(l2_in_out_acl_init) \
1145 _(l2_efp_filter_init) \
1153 l2_init (vlib_main_t * vm)
1155 clib_error_t *error;
1158 if ((error = vlib_call_init_function (vm, a))) return error; } \
1160 foreach_l2_init_function;
1165 VLIB_INIT_FUNCTION (l2_init);
1168 * fd.io coding-style-patch-verification: ON
1171 * eval: (c-set-style "gnu")