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>
27 #include <vnet/l2/l2_input.h>
28 #include <vnet/l2/l2_output.h>
29 #include <vnet/l2/feat_bitmap.h>
30 #include <vnet/l2/l2_bvi.h>
31 #include <vnet/l2/l2_fib.h>
32 #include <vnet/l2/l2_bd.h>
34 #include <vppinfra/error.h>
35 #include <vppinfra/hash.h>
36 #include <vppinfra/cache.h>
40 * @brief Interface Input Mode (Layer 2 Cross-Connect or Bridge / Layer 3).
42 * This file contains the CLI Commands that modify the input mode of an
43 * interface. For interfaces in a Layer 2 cross-connect, all packets
44 * received on one interface will be transmitted to the other. For
45 * interfaces in a bridge-domain, packets will be forwarded to other
46 * interfaces in the same bridge-domain based on destination mac address.
47 * For interfaces in Layer 3 mode, the packets will be routed.
50 /* Feature graph node names */
51 static char *l2input_feat_names[] = {
52 #define _(sym,name) name,
58 l2input_get_feat_names (void)
60 return l2input_feat_names;
64 format_l2_input_features (u8 * s, va_list * args)
66 static char *display_names[] = {
67 #define _(sym,name) #sym,
71 u32 feature_bitmap = va_arg (*args, u32);
73 if (feature_bitmap == 0)
75 s = format (s, " none configured");
79 feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */
81 for (i = L2INPUT_N_FEAT; i >= 0; i--)
82 if (feature_bitmap & (1 << i))
83 s = format (s, "%10s (%s)\n", display_names[i], l2input_feat_names[i]);
89 /* per-pkt trace data */
96 /* packet trace format function */
98 format_l2input_trace (u8 * s, va_list * args)
100 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
101 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
102 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
104 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
106 format_ethernet_address, t->dst,
107 format_ethernet_address, t->src);
111 l2input_main_t l2input_main;
113 #define foreach_l2input_error \
114 _(L2INPUT, "L2 input packets") \
115 _(DROP, "L2 input drops")
119 #define _(sym,str) L2INPUT_ERROR_##sym,
120 foreach_l2input_error
125 static char *l2input_error_strings[] = {
126 #define _(sym,string) string,
127 foreach_l2input_error
140 static_always_inline void
141 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
144 * Load L2 input feature struct
145 * Load bridge domain struct
146 * Parse ethernet header to determine unicast/mcast/broadcast
148 * classify packet as IP/UDP/TCP, control, other
149 * mask feature bitmap
150 * go to first node in bitmap
151 * Later: optimize VTM
154 * set tx sw-if-handle
159 l2_input_config_t *config;
160 l2_bridge_domain_t *bd_config;
164 ethernet_header_t *h0;
168 #define get_u16(addr) ( *((u16 *)(addr)) )
170 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
172 h0 = vlib_buffer_get_current (b0);
173 l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
175 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
178 /* Get config for the input interface */
179 config = vec_elt_at_index (msm->configs, sw_if_index0);
181 /* Save split horizon group */
182 vnet_buffer (b0)->l2.shg = config->shg;
184 /* determine layer2 kind for stat and mask */
185 if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address)))
187 protocol = ((ip6_header_t *) l3h0)->protocol;
189 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
190 feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD);
192 /* Disable ARP-term for non-ARP and non-ICMP6 packet */
193 if (ethertype != ETHERNET_TYPE_ARP &&
194 (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6))
195 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
200 * Check for from-BVI processing - set SHG of unicast packets from BVI
201 * to 0 so it is not dropped for VXLAN tunnels or other ports with the
202 * same SHG as that of the BVI.
204 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
206 vnet_buffer (b0)->l2.shg = 0;
212 /* Do bridge-domain processing */
213 bd_index0 = config->bd_index;
214 /* save BD ID for next feature graph nodes */
215 vnet_buffer (b0)->l2.bd_index = bd_index0;
217 /* Get config for the bridge domain interface */
218 bd_config = vec_elt_at_index (msm->bd_configs, bd_index0);
220 /* Save bridge domain and interface seq_num */
222 l2fib_seq_num_t sn = {
223 .swif = *l2fib_swif_seq_num(sw_if_index0),
224 .bd = bd_config->seq_num,
227 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
228 vnet_buffer (b0)->l2.bd_age = bd_config->mac_age;
231 * Process bridge domain feature enables.
232 * To perform learning/flooding/forwarding, the corresponding bit
233 * must be enabled in both the input interface config and in the
234 * bridge domain config. In the bd_bitmap, bits for features other
235 * than learning/flooding/forwarding should always be set.
237 feat_mask = feat_mask & bd_config->feature_bitmap;
239 else if (config->xconnect)
241 /* Set the output interface */
242 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
245 feat_mask = L2INPUT_FEAT_DROP;
247 /* mask out features from bitmap using packet type and bd config */
248 feature_bitmap = config->feature_bitmap & feat_mask;
250 /* save for next feature graph nodes */
251 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
253 /* Determine the next node */
254 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
258 static_always_inline uword
259 l2input_node_inline (vlib_main_t * vm,
260 vlib_node_runtime_t * node, vlib_frame_t * frame,
263 u32 n_left_from, *from, *to_next;
264 l2input_next_t next_index;
265 l2input_main_t *msm = &l2input_main;
267 from = vlib_frame_vector_args (frame);
268 n_left_from = frame->n_vectors; /* number of packets to process */
269 next_index = node->cached_next_index;
271 while (n_left_from > 0)
275 /* get space to enqueue frame to graph node "next_index" */
276 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
278 while (n_left_from >= 8 && n_left_to_next >= 4)
280 u32 bi0, bi1, bi2, bi3;
281 vlib_buffer_t *b0, *b1, *b2, *b3;
282 u32 next0, next1, next2, next3;
283 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
285 /* Prefetch next iteration. */
287 vlib_buffer_t *p4, *p5, *p6, *p7;
289 p4 = vlib_get_buffer (vm, from[4]);
290 p5 = vlib_get_buffer (vm, from[5]);
291 p6 = vlib_get_buffer (vm, from[6]);
292 p7 = vlib_get_buffer (vm, from[7]);
294 /* Prefetch the buffer header and packet for the N+2 loop iteration */
295 vlib_prefetch_buffer_header (p4, LOAD);
296 vlib_prefetch_buffer_header (p5, LOAD);
297 vlib_prefetch_buffer_header (p6, LOAD);
298 vlib_prefetch_buffer_header (p7, LOAD);
300 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
301 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
302 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
303 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
306 * Don't bother prefetching the bridge-domain config (which
307 * depends on the input config above). Only a small number of
308 * bridge domains are expected. Plus the structure is small
309 * and several fit in a cache line.
313 /* speculatively enqueue b0 and b1 to the current next frame */
314 /* bi is "buffer index", b is pointer to the buffer */
315 to_next[0] = bi0 = from[0];
316 to_next[1] = bi1 = from[1];
317 to_next[2] = bi2 = from[2];
318 to_next[3] = bi3 = from[3];
324 b0 = vlib_get_buffer (vm, bi0);
325 b1 = vlib_get_buffer (vm, bi1);
326 b2 = vlib_get_buffer (vm, bi2);
327 b3 = vlib_get_buffer (vm, bi3);
331 /* RX interface handles */
332 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
333 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
334 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
335 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
337 if (b0->flags & VLIB_BUFFER_IS_TRACED)
339 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
341 vlib_add_trace (vm, node, b0, sizeof (*t));
342 t->sw_if_index = sw_if_index0;
343 clib_memcpy (t->src, h0->src_address, 6);
344 clib_memcpy (t->dst, h0->dst_address, 6);
346 if (b1->flags & VLIB_BUFFER_IS_TRACED)
348 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
350 vlib_add_trace (vm, node, b1, sizeof (*t));
351 t->sw_if_index = sw_if_index1;
352 clib_memcpy (t->src, h1->src_address, 6);
353 clib_memcpy (t->dst, h1->dst_address, 6);
355 if (b2->flags & VLIB_BUFFER_IS_TRACED)
357 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
359 vlib_add_trace (vm, node, b2, sizeof (*t));
360 t->sw_if_index = sw_if_index2;
361 clib_memcpy (t->src, h2->src_address, 6);
362 clib_memcpy (t->dst, h2->dst_address, 6);
364 if (b3->flags & VLIB_BUFFER_IS_TRACED)
366 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
368 vlib_add_trace (vm, node, b3, sizeof (*t));
369 t->sw_if_index = sw_if_index3;
370 clib_memcpy (t->src, h3->src_address, 6);
371 clib_memcpy (t->dst, h3->dst_address, 6);
375 vlib_node_increment_counter (vm, l2input_node.index,
376 L2INPUT_ERROR_L2INPUT, 4);
378 classify_and_dispatch (msm, b0, &next0);
379 classify_and_dispatch (msm, b1, &next1);
380 classify_and_dispatch (msm, b2, &next2);
381 classify_and_dispatch (msm, b3, &next3);
383 /* verify speculative enqueues, maybe switch current next frame */
384 /* if next0==next1==next_index then nothing special needs to be done */
385 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
386 to_next, n_left_to_next,
388 next0, next1, next2, next3);
391 while (n_left_from > 0 && n_left_to_next > 0)
398 /* speculatively enqueue b0 to the current next frame */
406 b0 = vlib_get_buffer (vm, bi0);
408 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
410 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
411 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
412 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
413 t->sw_if_index = sw_if_index0;
414 clib_memcpy (t->src, h0->src_address, 6);
415 clib_memcpy (t->dst, h0->dst_address, 6);
418 vlib_node_increment_counter (vm, l2input_node.index,
419 L2INPUT_ERROR_L2INPUT, 1);
421 classify_and_dispatch (msm, b0, &next0);
423 /* verify speculative enqueue, maybe switch current next frame */
424 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
425 to_next, n_left_to_next,
429 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
432 return frame->n_vectors;
436 l2input_node_fn (vlib_main_t * vm,
437 vlib_node_runtime_t * node, vlib_frame_t * frame)
439 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
440 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
441 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
445 VLIB_REGISTER_NODE (l2input_node) = {
446 .function = l2input_node_fn,
448 .vector_size = sizeof (u32),
449 .format_trace = format_l2input_trace,
450 .format_buffer = format_ethernet_header_with_length,
451 .type = VLIB_NODE_TYPE_INTERNAL,
453 .n_errors = ARRAY_LEN(l2input_error_strings),
454 .error_strings = l2input_error_strings,
456 .n_next_nodes = L2INPUT_N_NEXT,
458 /* edit / add dispositions here */
460 [L2INPUT_NEXT_LEARN] = "l2-learn",
461 [L2INPUT_NEXT_FWD] = "l2-fwd",
462 [L2INPUT_NEXT_DROP] = "error-drop",
467 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
468 clib_error_t *l2input_init (vlib_main_t * vm)
470 l2input_main_t *mp = &l2input_main;
473 mp->vnet_main = vnet_get_main ();
475 /* Get packets RX'd from L2 interfaces */
476 ethernet_register_l2_input (vm, l2input_node.index);
478 /* Create the config vector */
479 vec_validate (mp->configs, 100);
480 /* create 100 sw interface entries and zero them */
482 /* Initialize the feature next-node indexes */
483 feat_bitmap_init_next_nodes (vm,
486 l2input_get_feat_names (),
487 mp->feat_next_node_index);
492 VLIB_INIT_FUNCTION (l2input_init);
495 /** Get a pointer to the config for the given interface. */
497 l2input_intf_config (u32 sw_if_index)
499 l2input_main_t *mp = &l2input_main;
501 vec_validate (mp->configs, sw_if_index);
502 return vec_elt_at_index (mp->configs, sw_if_index);
505 /** Enable (or disable) the feature in the bitmap for the given interface. */
507 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable)
509 l2_input_config_t *config = l2input_intf_config (sw_if_index);
512 config->feature_bitmap |= feature_bitmap;
514 config->feature_bitmap &= ~feature_bitmap;
516 return config->feature_bitmap;
520 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
522 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
523 bd_validate (bd_config);
524 bd_config->feature_bitmap =
525 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
526 return bd_config->feature_bitmap;
530 * Set the subinterface to run in l2 or l3 mode.
531 * For L3 mode, just the sw_if_index is specified.
532 * For bridged mode, the bd id and bvi flag are also specified.
533 * For xconnect mode, the peer sw_if_index is also specified.
534 * Return 0 if ok, or non-0 if there was an error.
538 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
539 u32 mode, /* One of L2 modes or back to L3 mode */
540 u32 sw_if_index, /* sw interface index */
541 u32 bd_index, /* for bridged interface */
542 u32 bvi, /* the bridged interface is the BVI */
543 u32 shg, /* the bridged interface split horizon group */
544 u32 xc_sw_if_index) /* peer interface for xconnect */
546 l2input_main_t *mp = &l2input_main;
547 l2output_main_t *l2om = &l2output_main;
548 vnet_main_t *vnm = vnet_get_main ();
549 vnet_hw_interface_t *hi;
550 l2_output_config_t *out_config;
551 l2_input_config_t *config;
552 l2_bridge_domain_t *bd_config;
554 i32 l2_if_adjust = 0;
557 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
558 config = l2input_intf_config (sw_if_index);
562 /* Interface is already in bridge mode. Undo the existing config. */
563 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
565 /* remove interface from flood vector */
566 bd_remove_member (bd_config, sw_if_index);
568 /* undo any BVI-related config */
569 if (bd_config->bvi_sw_if_index == sw_if_index)
571 bd_config->bvi_sw_if_index = ~0;
574 /* delete the l2fib entry for the bvi interface */
575 mac = *((u64 *) hi->hw_address);
576 l2fib_del_entry (mac, config->bd_index);
578 /* Make loop output node send packet back to ethernet-input node */
580 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
582 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
583 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
586 /* Clear MACs learned on the interface */
587 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
588 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
589 l2fib_flush_int_mac (vm, sw_if_index);
593 else if (config->xconnect)
598 /* Make sure vector is big enough */
599 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
602 /* Initialize the l2-input configuration for the interface */
605 /* Set L2 config to BD index 0 so that if any packet accidentally
606 * came in on L2 path, it will be dropped in BD 0 */
607 config->xconnect = 0;
610 config->bd_index = 0;
611 config->feature_bitmap = L2INPUT_FEAT_DROP;
613 /* Clear L2 output config */
614 out_config = l2output_intf_config (sw_if_index);
615 memset (out_config, 0, sizeof (l2_output_config_t));
617 /* Make sure any L2-output packet to this interface now in L3 mode is
618 * dropped. This may happen if L2 FIB MAC entry is stale */
619 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
623 /* Add or update l2-output node next-arc and output_node_index_vec table
624 * for the interface */
625 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
627 if (mode == MODE_L2_BRIDGE)
630 * Remove a check that the interface must be an Ethernet.
631 * Specifically so we can bridge to L3 tunnel interfaces.
633 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
637 return MODE_ERROR_ETH; /* non-ethernet */
639 config->xconnect = 0;
641 config->bd_index = bd_index;
642 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
645 * Enable forwarding, flooding, learning and ARP termination by default
646 * (note that ARP term is disabled on BD feature bitmap by default)
648 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
649 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
651 /* Make sure last-chance drop is configured */
652 config->feature_bitmap |= L2INPUT_FEAT_DROP;
654 /* Make sure xconnect is disabled */
655 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
657 /* Set up bridge domain */
658 bd_config = l2input_bd_config (bd_index);
659 bd_validate (bd_config);
661 /* TODO: think: add l2fib entry even for non-bvi interface? */
663 /* Do BVI interface initializations */
666 /* ensure BD has no bvi interface (or replace that one with this??) */
667 if (bd_config->bvi_sw_if_index != ~0)
669 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
671 bd_config->bvi_sw_if_index = sw_if_index;
674 /* create the l2fib entry for the bvi interface */
675 mac = *((u64 *) hi->hw_address);
676 l2fib_add_fwd_entry (mac, bd_index, sw_if_index, 1, 1); /* static + bvi */
678 /* Disable learning by default. no use since l2fib entry is static. */
679 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
681 /* Make loop output node send packet to l2-input node */
683 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
685 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
686 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
689 /* Add interface to bridge-domain flood vector */
690 l2_flood_member_t member = {
691 .sw_if_index = sw_if_index,
692 .flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL,
695 bd_add_member (bd_config, &member);
698 else if (mode == MODE_L2_XC)
700 config->xconnect = 1;
702 config->output_sw_if_index = xc_sw_if_index;
704 /* Make sure last-chance drop is configured */
705 config->feature_bitmap |= L2INPUT_FEAT_DROP;
707 /* Make sure bridging features are disabled */
708 config->feature_bitmap &=
709 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
711 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
712 shg = 0; /* not used in xconnect */
714 else if (mode == MODE_L2_CLASSIFY)
716 config->xconnect = 1;
718 config->output_sw_if_index = xc_sw_if_index;
720 /* Make sure last-chance drop is configured */
721 config->feature_bitmap |=
722 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
724 /* Make sure bridging features are disabled */
725 config->feature_bitmap &=
726 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
727 shg = 0; /* not used in xconnect */
729 /* Insure all packets go to ethernet-input */
730 ethernet_set_rx_redirect (vnet_main, hi, 1);
733 /* set up split-horizon group and set output feature bit */
735 out_config = l2output_intf_config (sw_if_index);
736 out_config->shg = shg;
737 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
740 * Test: remove this when non-IP features can be configured.
741 * Enable a non-IP feature to test IP feature masking
742 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
748 /* Adjust count of L2 interfaces */
749 hi->l2_if_count += l2_if_adjust;
751 if (hi->hw_class_index == ethernet_hw_interface_class.index)
753 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
755 /* Just added first L2 interface on this port */
757 /* Set promiscuous mode on the l2 interface */
758 ethernet_set_flags (vnet_main, hi->hw_if_index,
759 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
761 /* ensure all packets go to ethernet-input */
762 ethernet_set_rx_redirect (vnet_main, hi, 1);
765 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
767 /* Just removed only L2 subinterface on this port */
769 /* Disable promiscuous mode on the l2 interface */
770 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
772 /* Allow ip packets to go directly to ip4-input etc */
773 ethernet_set_rx_redirect (vnet_main, hi, 0);
777 /* Set up the L2/L3 flag in the interface parsing tables */
778 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
784 * Set subinterface in bridging mode with a bridge-domain ID.
786 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
788 static clib_error_t *
789 int_l2_bridge (vlib_main_t * vm,
790 unformat_input_t * input, vlib_cli_command_t * cmd)
792 vnet_main_t *vnm = vnet_get_main ();
793 clib_error_t *error = 0;
800 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
802 error = clib_error_return (0, "unknown interface `%U'",
803 format_unformat_error, input);
807 if (!unformat (input, "%d", &bd_id))
809 error = clib_error_return (0, "expected bridge domain ID `%U'",
810 format_unformat_error, input);
814 if (bd_id > L2_BD_ID_MAX)
816 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
817 format_unformat_error, input);
820 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
823 bvi = unformat (input, "bvi");
825 /* optional split horizon group */
827 (void) unformat (input, "%d", &shg);
829 /* set the interface mode */
831 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi,
834 if (rc == MODE_ERROR_ETH)
836 error = clib_error_return (0, "bridged interface must be ethernet",
837 format_unformat_error, input);
839 else if (rc == MODE_ERROR_BVI_DEF)
842 clib_error_return (0, "bridge-domain already has a bvi interface",
843 format_unformat_error, input);
847 error = clib_error_return (0, "invalid configuration for interface",
848 format_unformat_error, input);
858 * Use this command put an interface into Layer 2 bridge domain. If a
859 * bridge-domain with the provided bridge-domain-id does not exist, it
860 * will be created. Interfaces in a bridge-domain forward packets to
861 * other interfaces in the same bridge-domain based on destination mac
862 * address. To remove an interface from a the Layer 2 bridge domain,
863 * put the interface in a different mode, for example Layer 3 mode.
865 * Optionally, an interface can be added to a Layer 2 bridge-domain as
866 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
867 * bridge-domain can be a bvi.
869 * Optionally, a split-horizon group can also be specified. This defaults
870 * to 0 if not specified.
873 * Example of how to configure a Layer 2 bridge-domain with three
874 * interfaces (where 200 is the bridge-domain-id):
875 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
876 * This interface is added a BVI interface:
877 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
878 * This interface also has a split-horizon group of 1 specified:
879 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
880 * Example of how to remove an interface from a Layer2 bridge-domain:
881 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
884 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
885 .path = "set interface l2 bridge",
886 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]",
887 .function = int_l2_bridge,
892 * Set subinterface in xconnect mode with another interface.
894 * set interface l2 xconnect <interface> <peer interface>
896 static clib_error_t *
897 int_l2_xc (vlib_main_t * vm,
898 unformat_input_t * input, vlib_cli_command_t * cmd)
900 vnet_main_t *vnm = vnet_get_main ();
901 clib_error_t *error = 0;
905 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
907 error = clib_error_return (0, "unknown interface `%U'",
908 format_unformat_error, input);
913 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
915 error = clib_error_return (0, "unknown peer interface `%U'",
916 format_unformat_error, input);
920 /* set the interface mode */
922 (vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index))
924 error = clib_error_return (0, "invalid configuration for interface",
925 format_unformat_error, input);
934 * Use this command put an interface into Layer 2 cross-connect mode.
935 * Both interfaces must be in this mode for bi-directioal traffic. All
936 * packets received on one interface will be transmitted to the other.
937 * To remove the Layer 2 cross-connect, put the interface in a different
938 * mode, for example Layer 3 mode.
941 * Example of how to configure a Layer2 cross-connect between two interfaces:
942 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
943 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
944 * Example of how to remove a Layer2 cross-connect:
945 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
946 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
949 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
950 .path = "set interface l2 xconnect",
951 .short_help = "set interface l2 xconnect <interface> <peer interface>",
952 .function = int_l2_xc,
957 * Set subinterface in L3 mode.
959 * set interface l3 <interface>
961 static clib_error_t *
962 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
964 vnet_main_t *vnm = vnet_get_main ();
965 clib_error_t *error = 0;
968 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
970 error = clib_error_return (0, "unknown interface `%U'",
971 format_unformat_error, input);
975 /* set the interface mode */
976 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0))
978 error = clib_error_return (0, "invalid configuration for interface",
979 format_unformat_error, input);
988 * Modify the packet processing mode of the interface to Layer 3, which
989 * implies packets will be routed. This is the default mode of an interface.
990 * Use this command to remove an interface from a Layer 2 cross-connect or a
994 * Example of how to set the mode of an interface to Layer 3:
995 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
998 VLIB_CLI_COMMAND (int_l3_cli, static) = {
999 .path = "set interface l3",
1000 .short_help = "set interface l3 <interface>",
1006 * Show interface mode.
1007 * The CLI format is:
1008 * show mode [<if-name1> <if-name2> ...]
1010 static clib_error_t *
1011 show_int_mode (vlib_main_t * vm,
1012 unformat_input_t * input, vlib_cli_command_t * cmd)
1014 vnet_main_t *vnm = vnet_get_main ();
1015 clib_error_t *error = 0;
1018 vnet_interface_main_t *im = &vnm->interface_main;
1020 vnet_sw_interface_t *si, *sis = 0;
1021 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1025 /* See if user wants to show specific interface */
1027 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1029 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1030 vec_add1 (sis, si[0]);
1034 error = clib_error_return (0, "unknown input `%U'",
1035 format_unformat_error, input);
1040 if (vec_len (sis) == 0) /* Get all interfaces */
1042 /* Gather interfaces. */
1043 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1046 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1050 vec_foreach (si, sis)
1052 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1057 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1059 args = format (0, "bd_id %d%s%d", bd_id,
1060 config->bvi ? " bvi shg " : " shg ", config->shg);
1062 else if (config->xconnect)
1064 mode = "l2 xconnect";
1065 args = format (0, "%U",
1066 format_vnet_sw_if_index_name,
1067 vnm, config->output_sw_if_index);
1072 args = format (0, " ");
1074 vlib_cli_output (vm, "%s %U %v\n",
1076 format_vnet_sw_if_index_name,
1077 vnm, si->sw_if_index, args);
1088 * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge,
1089 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1090 * output to just the provided list of interfaces and sub-interfaces.
1091 * The output shows the mode, the interface, and if the interface is
1092 * a member of a bridge, the bridge-domain-id and the split horizen group (shg).
1095 * Example of displaying the mode of all interfaces:
1096 * @cliexstart{show mode}
1098 * l3 GigabitEthernet0/8/0
1099 * l3 GigabitEthernet0/9/0
1100 * l3 GigabitEthernet0/a/0
1101 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1102 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1103 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1104 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1105 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1107 * Example of displaying the mode of a seleted list of interfaces:
1108 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1109 * l3 GigabitEthernet0/8/0
1110 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1114 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1115 .path = "show mode",
1116 .short_help = "show mode [<if-name1> <if-name2> ...]",
1117 .function = show_int_mode,
1121 #define foreach_l2_init_function \
1122 _(feat_bitmap_drop_init) \
1124 _(l2_input_classify_init) \
1131 _(l2_efp_filter_init) \
1140 l2_init (vlib_main_t * vm)
1142 clib_error_t *error;
1145 if ((error = vlib_call_init_function (vm, a))) return error; } \
1147 foreach_l2_init_function;
1152 VLIB_INIT_FUNCTION (l2_init);
1155 * fd.io coding-style-patch-verification: ON
1158 * eval: (c-set-style "gnu")