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;;
230 * Process bridge domain feature enables.
231 * To perform learning/flooding/forwarding, the corresponding bit
232 * must be enabled in both the input interface config and in the
233 * bridge domain config. In the bd_bitmap, bits for features other
234 * than learning/flooding/forwarding should always be set.
236 feat_mask = feat_mask & bd_config->feature_bitmap;
238 else if (config->xconnect)
240 /* Set the output interface */
241 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
244 feat_mask = L2INPUT_FEAT_DROP;
246 /* mask out features from bitmap using packet type and bd config */
247 feature_bitmap = config->feature_bitmap & feat_mask;
249 /* save for next feature graph nodes */
250 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
252 /* Determine the next node */
253 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
257 static_always_inline uword
258 l2input_node_inline (vlib_main_t * vm,
259 vlib_node_runtime_t * node, vlib_frame_t * frame,
262 u32 n_left_from, *from, *to_next;
263 l2input_next_t next_index;
264 l2input_main_t *msm = &l2input_main;
266 from = vlib_frame_vector_args (frame);
267 n_left_from = frame->n_vectors; /* number of packets to process */
268 next_index = node->cached_next_index;
270 while (n_left_from > 0)
274 /* get space to enqueue frame to graph node "next_index" */
275 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
277 while (n_left_from >= 8 && n_left_to_next >= 4)
279 u32 bi0, bi1, bi2, bi3;
280 vlib_buffer_t *b0, *b1, *b2, *b3;
281 u32 next0, next1, next2, next3;
282 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
284 /* Prefetch next iteration. */
286 vlib_buffer_t *p4, *p5, *p6, *p7;
288 p4 = vlib_get_buffer (vm, from[4]);
289 p5 = vlib_get_buffer (vm, from[5]);
290 p6 = vlib_get_buffer (vm, from[6]);
291 p7 = vlib_get_buffer (vm, from[7]);
293 /* Prefetch the buffer header and packet for the N+2 loop iteration */
294 vlib_prefetch_buffer_header (p4, LOAD);
295 vlib_prefetch_buffer_header (p5, LOAD);
296 vlib_prefetch_buffer_header (p6, LOAD);
297 vlib_prefetch_buffer_header (p7, LOAD);
299 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
300 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
301 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
302 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
305 * Don't bother prefetching the bridge-domain config (which
306 * depends on the input config above). Only a small number of
307 * bridge domains are expected. Plus the structure is small
308 * and several fit in a cache line.
312 /* speculatively enqueue b0 and b1 to the current next frame */
313 /* bi is "buffer index", b is pointer to the buffer */
314 to_next[0] = bi0 = from[0];
315 to_next[1] = bi1 = from[1];
316 to_next[2] = bi2 = from[2];
317 to_next[3] = bi3 = from[3];
323 b0 = vlib_get_buffer (vm, bi0);
324 b1 = vlib_get_buffer (vm, bi1);
325 b2 = vlib_get_buffer (vm, bi2);
326 b3 = vlib_get_buffer (vm, bi3);
330 /* RX interface handles */
331 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
332 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
333 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
334 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
336 if (b0->flags & VLIB_BUFFER_IS_TRACED)
338 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
340 vlib_add_trace (vm, node, b0, sizeof (*t));
341 t->sw_if_index = sw_if_index0;
342 clib_memcpy (t->src, h0->src_address, 6);
343 clib_memcpy (t->dst, h0->dst_address, 6);
345 if (b1->flags & VLIB_BUFFER_IS_TRACED)
347 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
349 vlib_add_trace (vm, node, b1, sizeof (*t));
350 t->sw_if_index = sw_if_index1;
351 clib_memcpy (t->src, h1->src_address, 6);
352 clib_memcpy (t->dst, h1->dst_address, 6);
354 if (b2->flags & VLIB_BUFFER_IS_TRACED)
356 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
358 vlib_add_trace (vm, node, b2, sizeof (*t));
359 t->sw_if_index = sw_if_index2;
360 clib_memcpy (t->src, h2->src_address, 6);
361 clib_memcpy (t->dst, h2->dst_address, 6);
363 if (b3->flags & VLIB_BUFFER_IS_TRACED)
365 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
367 vlib_add_trace (vm, node, b3, sizeof (*t));
368 t->sw_if_index = sw_if_index3;
369 clib_memcpy (t->src, h3->src_address, 6);
370 clib_memcpy (t->dst, h3->dst_address, 6);
374 vlib_node_increment_counter (vm, l2input_node.index,
375 L2INPUT_ERROR_L2INPUT, 4);
377 classify_and_dispatch (msm, b0, &next0);
378 classify_and_dispatch (msm, b1, &next1);
379 classify_and_dispatch (msm, b2, &next2);
380 classify_and_dispatch (msm, b3, &next3);
382 /* verify speculative enqueues, maybe switch current next frame */
383 /* if next0==next1==next_index then nothing special needs to be done */
384 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
385 to_next, n_left_to_next,
387 next0, next1, next2, next3);
390 while (n_left_from > 0 && n_left_to_next > 0)
397 /* speculatively enqueue b0 to the current next frame */
405 b0 = vlib_get_buffer (vm, bi0);
407 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
409 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
410 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
411 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
412 t->sw_if_index = sw_if_index0;
413 clib_memcpy (t->src, h0->src_address, 6);
414 clib_memcpy (t->dst, h0->dst_address, 6);
417 vlib_node_increment_counter (vm, l2input_node.index,
418 L2INPUT_ERROR_L2INPUT, 1);
420 classify_and_dispatch (msm, b0, &next0);
422 /* verify speculative enqueue, maybe switch current next frame */
423 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
424 to_next, n_left_to_next,
428 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
431 return frame->n_vectors;
435 l2input_node_fn (vlib_main_t * vm,
436 vlib_node_runtime_t * node, vlib_frame_t * frame)
438 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
439 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
440 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
444 VLIB_REGISTER_NODE (l2input_node) = {
445 .function = l2input_node_fn,
447 .vector_size = sizeof (u32),
448 .format_trace = format_l2input_trace,
449 .format_buffer = format_ethernet_header_with_length,
450 .type = VLIB_NODE_TYPE_INTERNAL,
452 .n_errors = ARRAY_LEN(l2input_error_strings),
453 .error_strings = l2input_error_strings,
455 .n_next_nodes = L2INPUT_N_NEXT,
457 /* edit / add dispositions here */
459 [L2INPUT_NEXT_LEARN] = "l2-learn",
460 [L2INPUT_NEXT_FWD] = "l2-fwd",
461 [L2INPUT_NEXT_DROP] = "error-drop",
466 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
467 clib_error_t *l2input_init (vlib_main_t * vm)
469 l2input_main_t *mp = &l2input_main;
472 mp->vnet_main = vnet_get_main ();
474 /* Get packets RX'd from L2 interfaces */
475 ethernet_register_l2_input (vm, l2input_node.index);
477 /* Create the config vector */
478 vec_validate (mp->configs, 100);
479 /* create 100 sw interface entries and zero them */
481 /* Initialize the feature next-node indexes */
482 feat_bitmap_init_next_nodes (vm,
485 l2input_get_feat_names (),
486 mp->feat_next_node_index);
491 VLIB_INIT_FUNCTION (l2input_init);
494 /** Get a pointer to the config for the given interface. */
496 l2input_intf_config (u32 sw_if_index)
498 l2input_main_t *mp = &l2input_main;
500 vec_validate (mp->configs, sw_if_index);
501 return vec_elt_at_index (mp->configs, sw_if_index);
504 /** Enable (or disable) the feature in the bitmap for the given interface. */
506 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable)
508 l2_input_config_t *config = l2input_intf_config (sw_if_index);
511 config->feature_bitmap |= feature_bitmap;
513 config->feature_bitmap &= ~feature_bitmap;
515 return config->feature_bitmap;
519 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
521 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
522 bd_validate (bd_config);
523 bd_config->feature_bitmap =
524 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
525 return bd_config->feature_bitmap;
529 * Set the subinterface to run in l2 or l3 mode.
530 * For L3 mode, just the sw_if_index is specified.
531 * For bridged mode, the bd id and bvi flag are also specified.
532 * For xconnect mode, the peer sw_if_index is also specified.
533 * Return 0 if ok, or non-0 if there was an error.
537 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
538 u32 mode, /* One of L2 modes or back to L3 mode */
539 u32 sw_if_index, /* sw interface index */
540 u32 bd_index, /* for bridged interface */
541 u32 bvi, /* the bridged interface is the BVI */
542 u32 shg, /* the bridged interface split horizon group */
543 u32 xc_sw_if_index) /* peer interface for xconnect */
545 l2input_main_t *mp = &l2input_main;
546 l2output_main_t *l2om = &l2output_main;
547 vnet_main_t *vnm = vnet_get_main ();
548 vnet_hw_interface_t *hi;
549 l2_output_config_t *out_config;
550 l2_input_config_t *config;
551 l2_bridge_domain_t *bd_config;
553 i32 l2_if_adjust = 0;
556 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
557 config = l2input_intf_config (sw_if_index);
561 /* Interface is already in bridge mode. Undo the existing config. */
562 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
564 /* remove interface from flood vector */
565 bd_remove_member (bd_config, sw_if_index);
567 /* undo any BVI-related config */
568 if (bd_config->bvi_sw_if_index == sw_if_index)
570 bd_config->bvi_sw_if_index = ~0;
573 /* delete the l2fib entry for the bvi interface */
574 mac = *((u64 *) hi->hw_address);
575 l2fib_del_entry (mac, config->bd_index);
577 /* Make loop output node send packet back to ethernet-input node */
579 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
581 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
582 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
585 /* Clear MACs learned on the interface */
586 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
587 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
588 l2fib_flush_int_mac (vm, sw_if_index);
592 else if (config->xconnect)
597 /* Make sure vector is big enough */
598 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
601 /* Initialize the l2-input configuration for the interface */
604 /* Set L2 config to BD index 0 so that if any packet accidentally
605 * came in on L2 path, it will be dropped in BD 0 */
606 config->xconnect = 0;
609 config->bd_index = 0;
610 config->feature_bitmap = L2INPUT_FEAT_DROP;
612 /* Clear L2 output config */
613 out_config = l2output_intf_config (sw_if_index);
614 memset (out_config, 0, sizeof (l2_output_config_t));
616 /* Make sure any L2-output packet to this interface now in L3 mode is
617 * dropped. This may happen if L2 FIB MAC entry is stale */
618 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
622 /* Add or update l2-output node next-arc and output_node_index_vec table
623 * for the interface */
624 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
626 if (mode == MODE_L2_BRIDGE)
629 * Remove a check that the interface must be an Ethernet.
630 * Specifically so we can bridge to L3 tunnel interfaces.
632 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
636 return MODE_ERROR_ETH; /* non-ethernet */
638 config->xconnect = 0;
640 config->bd_index = bd_index;
641 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
644 * Enable forwarding, flooding, learning and ARP termination by default
645 * (note that ARP term is disabled on BD feature bitmap by default)
647 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
648 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
650 /* Make sure last-chance drop is configured */
651 config->feature_bitmap |= L2INPUT_FEAT_DROP;
653 /* Make sure xconnect is disabled */
654 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
656 /* Set up bridge domain */
657 bd_config = l2input_bd_config (bd_index);
658 bd_validate (bd_config);
660 /* TODO: think: add l2fib entry even for non-bvi interface? */
662 /* Do BVI interface initializations */
665 /* ensure BD has no bvi interface (or replace that one with this??) */
666 if (bd_config->bvi_sw_if_index != ~0)
668 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
670 bd_config->bvi_sw_if_index = sw_if_index;
673 /* create the l2fib entry for the bvi interface */
674 mac = *((u64 *) hi->hw_address);
675 l2fib_add_fwd_entry (mac, bd_index, sw_if_index, 1, 1); /* static + bvi */
677 /* Disable learning by default. no use since l2fib entry is static. */
678 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
680 /* Make loop output node send packet to l2-input node */
682 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
684 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
685 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
688 /* Add interface to bridge-domain flood vector */
689 l2_flood_member_t member = {
690 .sw_if_index = sw_if_index,
691 .flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL,
694 bd_add_member (bd_config, &member);
697 else if (mode == MODE_L2_XC)
699 config->xconnect = 1;
701 config->output_sw_if_index = xc_sw_if_index;
703 /* Make sure last-chance drop is configured */
704 config->feature_bitmap |= L2INPUT_FEAT_DROP;
706 /* Make sure bridging features are disabled */
707 config->feature_bitmap &=
708 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
710 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
711 shg = 0; /* not used in xconnect */
713 else if (mode == MODE_L2_CLASSIFY)
715 config->xconnect = 1;
717 config->output_sw_if_index = xc_sw_if_index;
719 /* Make sure last-chance drop is configured */
720 config->feature_bitmap |=
721 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
723 /* Make sure bridging features are disabled */
724 config->feature_bitmap &=
725 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
726 shg = 0; /* not used in xconnect */
728 /* Insure all packets go to ethernet-input */
729 ethernet_set_rx_redirect (vnet_main, hi, 1);
732 /* set up split-horizon group and set output feature bit */
734 out_config = l2output_intf_config (sw_if_index);
735 out_config->shg = shg;
736 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
739 * Test: remove this when non-IP features can be configured.
740 * Enable a non-IP feature to test IP feature masking
741 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
747 /* Adjust count of L2 interfaces */
748 hi->l2_if_count += l2_if_adjust;
750 if (hi->hw_class_index == ethernet_hw_interface_class.index)
752 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
754 /* Just added first L2 interface on this port */
756 /* Set promiscuous mode on the l2 interface */
757 ethernet_set_flags (vnet_main, hi->hw_if_index,
758 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
760 /* ensure all packets go to ethernet-input */
761 ethernet_set_rx_redirect (vnet_main, hi, 1);
764 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
766 /* Just removed only L2 subinterface on this port */
768 /* Disable promiscuous mode on the l2 interface */
769 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
771 /* Allow ip packets to go directly to ip4-input etc */
772 ethernet_set_rx_redirect (vnet_main, hi, 0);
776 /* Set up the L2/L3 flag in the interface parsing tables */
777 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
783 * Set subinterface in bridging mode with a bridge-domain ID.
785 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
787 static clib_error_t *
788 int_l2_bridge (vlib_main_t * vm,
789 unformat_input_t * input, vlib_cli_command_t * cmd)
791 vnet_main_t *vnm = vnet_get_main ();
792 clib_error_t *error = 0;
799 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
801 error = clib_error_return (0, "unknown interface `%U'",
802 format_unformat_error, input);
806 if (!unformat (input, "%d", &bd_id))
808 error = clib_error_return (0, "expected bridge domain ID `%U'",
809 format_unformat_error, input);
813 if (bd_id > L2_BD_ID_MAX)
815 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
816 format_unformat_error, input);
819 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
822 bvi = unformat (input, "bvi");
824 /* optional split horizon group */
826 (void) unformat (input, "%d", &shg);
828 /* set the interface mode */
830 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi,
833 if (rc == MODE_ERROR_ETH)
835 error = clib_error_return (0, "bridged interface must be ethernet",
836 format_unformat_error, input);
838 else if (rc == MODE_ERROR_BVI_DEF)
841 clib_error_return (0, "bridge-domain already has a bvi interface",
842 format_unformat_error, input);
846 error = clib_error_return (0, "invalid configuration for interface",
847 format_unformat_error, input);
857 * Use this command put an interface into Layer 2 bridge domain. If a
858 * bridge-domain with the provided bridge-domain-id does not exist, it
859 * will be created. Interfaces in a bridge-domain forward packets to
860 * other interfaces in the same bridge-domain based on destination mac
861 * address. To remove an interface from a the Layer 2 bridge domain,
862 * put the interface in a different mode, for example Layer 3 mode.
864 * Optionally, an interface can be added to a Layer 2 bridge-domain as
865 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
866 * bridge-domain can be a bvi.
868 * Optionally, a split-horizon group can also be specified. This defaults
869 * to 0 if not specified.
872 * Example of how to configure a Layer 2 bridge-domain with three
873 * interfaces (where 200 is the bridge-domain-id):
874 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
875 * This interface is added a BVI interface:
876 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
877 * This interface also has a split-horizon group of 1 specified:
878 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
879 * Example of how to remove an interface from a Layer2 bridge-domain:
880 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
883 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
884 .path = "set interface l2 bridge",
885 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]",
886 .function = int_l2_bridge,
891 * Set subinterface in xconnect mode with another interface.
893 * set interface l2 xconnect <interface> <peer interface>
895 static clib_error_t *
896 int_l2_xc (vlib_main_t * vm,
897 unformat_input_t * input, vlib_cli_command_t * cmd)
899 vnet_main_t *vnm = vnet_get_main ();
900 clib_error_t *error = 0;
904 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
906 error = clib_error_return (0, "unknown interface `%U'",
907 format_unformat_error, input);
912 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
914 error = clib_error_return (0, "unknown peer interface `%U'",
915 format_unformat_error, input);
919 /* set the interface mode */
921 (vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index))
923 error = clib_error_return (0, "invalid configuration for interface",
924 format_unformat_error, input);
933 * Use this command put an interface into Layer 2 cross-connect mode.
934 * Both interfaces must be in this mode for bi-directioal traffic. All
935 * packets received on one interface will be transmitted to the other.
936 * To remove the Layer 2 cross-connect, put the interface in a different
937 * mode, for example Layer 3 mode.
940 * Example of how to configure a Layer2 cross-connect between two interfaces:
941 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
942 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
943 * Example of how to remove a Layer2 cross-connect:
944 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
945 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
948 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
949 .path = "set interface l2 xconnect",
950 .short_help = "set interface l2 xconnect <interface> <peer interface>",
951 .function = int_l2_xc,
956 * Set subinterface in L3 mode.
958 * set interface l3 <interface>
960 static clib_error_t *
961 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
963 vnet_main_t *vnm = vnet_get_main ();
964 clib_error_t *error = 0;
967 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
969 error = clib_error_return (0, "unknown interface `%U'",
970 format_unformat_error, input);
974 /* set the interface mode */
975 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0))
977 error = clib_error_return (0, "invalid configuration for interface",
978 format_unformat_error, input);
987 * Modify the packet processing mode of the interface to Layer 3, which
988 * implies packets will be routed. This is the default mode of an interface.
989 * Use this command to remove an interface from a Layer 2 cross-connect or a
993 * Example of how to set the mode of an interface to Layer 3:
994 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
997 VLIB_CLI_COMMAND (int_l3_cli, static) = {
998 .path = "set interface l3",
999 .short_help = "set interface l3 <interface>",
1005 * Show interface mode.
1006 * The CLI format is:
1007 * show mode [<if-name1> <if-name2> ...]
1009 static clib_error_t *
1010 show_int_mode (vlib_main_t * vm,
1011 unformat_input_t * input, vlib_cli_command_t * cmd)
1013 vnet_main_t *vnm = vnet_get_main ();
1014 clib_error_t *error = 0;
1017 vnet_interface_main_t *im = &vnm->interface_main;
1019 vnet_sw_interface_t *si, *sis = 0;
1020 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1024 /* See if user wants to show specific interface */
1026 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1028 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1029 vec_add1 (sis, si[0]);
1033 error = clib_error_return (0, "unknown input `%U'",
1034 format_unformat_error, input);
1039 if (vec_len (sis) == 0) /* Get all interfaces */
1041 /* Gather interfaces. */
1042 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1045 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1049 vec_foreach (si, sis)
1051 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1056 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1058 args = format (0, "bd_id %d%s%d", bd_id,
1059 config->bvi ? " bvi shg " : " shg ", config->shg);
1061 else if (config->xconnect)
1063 mode = "l2 xconnect";
1064 args = format (0, "%U",
1065 format_vnet_sw_if_index_name,
1066 vnm, config->output_sw_if_index);
1071 args = format (0, " ");
1073 vlib_cli_output (vm, "%s %U %v\n",
1075 format_vnet_sw_if_index_name,
1076 vnm, si->sw_if_index, args);
1087 * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge,
1088 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1089 * output to just the provided list of interfaces and sub-interfaces.
1090 * The output shows the mode, the interface, and if the interface is
1091 * a member of a bridge, the bridge-domain-id and the split horizen group (shg).
1094 * Example of displaying the mode of all interfaces:
1095 * @cliexstart{show mode}
1097 * l3 GigabitEthernet0/8/0
1098 * l3 GigabitEthernet0/9/0
1099 * l3 GigabitEthernet0/a/0
1100 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1101 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1102 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1103 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1104 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1106 * Example of displaying the mode of a seleted list of interfaces:
1107 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1108 * l3 GigabitEthernet0/8/0
1109 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1113 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1114 .path = "show mode",
1115 .short_help = "show mode [<if-name1> <if-name2> ...]",
1116 .function = show_int_mode,
1120 #define foreach_l2_init_function \
1121 _(feat_bitmap_drop_init) \
1123 _(l2_input_classify_init) \
1130 _(l2_efp_filter_init) \
1139 l2_init (vlib_main_t * vm)
1141 clib_error_t *error;
1144 if ((error = vlib_call_init_function (vm, a))) return error; } \
1146 foreach_l2_init_function;
1151 VLIB_INIT_FUNCTION (l2_init);
1154 * fd.io coding-style-patch-verification: ON
1157 * eval: (c-set-style "gnu")