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;
66 /* per-pkt trace data */
73 /* packet trace format function */
75 format_l2input_trace (u8 * s, va_list * args)
77 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
78 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
79 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
81 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
83 format_ethernet_address, t->dst,
84 format_ethernet_address, t->src);
88 l2input_main_t l2input_main;
90 #define foreach_l2input_error \
91 _(L2INPUT, "L2 input packets") \
92 _(DROP, "L2 input drops")
96 #define _(sym,str) L2INPUT_ERROR_##sym,
102 static char *l2input_error_strings[] = {
103 #define _(sym,string) string,
104 foreach_l2input_error
117 static_always_inline void
118 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
121 * Load L2 input feature struct
122 * Load bridge domain struct
123 * Parse ethernet header to determine unicast/mcast/broadcast
125 * classify packet as IP/UDP/TCP, control, other
126 * mask feature bitmap
127 * go to first node in bitmap
128 * Later: optimize VTM
131 * set tx sw-if-handle
136 l2_input_config_t *config;
137 l2_bridge_domain_t *bd_config;
141 ethernet_header_t *h0;
145 #define get_u16(addr) ( *((u16 *)(addr)) )
147 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
149 h0 = vlib_buffer_get_current (b0);
150 l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
152 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
155 /* Get config for the input interface */
156 config = vec_elt_at_index (msm->configs, sw_if_index0);
158 /* Save split horizon group */
159 vnet_buffer (b0)->l2.shg = config->shg;
161 /* determine layer2 kind for stat and mask */
162 if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address)))
164 protocol = ((ip6_header_t *) l3h0)->protocol;
166 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
167 feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD);
169 /* Disable ARP-term for non-ARP and non-ICMP6 packet */
170 if (ethertype != ETHERNET_TYPE_ARP &&
171 (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6))
172 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
177 * Check for from-BVI processing - set SHG of unicast packets from BVI
178 * to 0 so it is not dropped for VXLAN tunnels or other ports with the
179 * same SHG as that of the BVI.
181 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
183 vnet_buffer (b0)->l2.shg = 0;
189 /* Do bridge-domain processing */
190 bd_index0 = config->bd_index;
191 /* save BD ID for next feature graph nodes */
192 vnet_buffer (b0)->l2.bd_index = bd_index0;
194 /* Get config for the bridge domain interface */
195 bd_config = vec_elt_at_index (msm->bd_configs, bd_index0);
197 /* Save bridge domain and interface seq_num */
199 l2fib_seq_num_t sn = {
200 .swif = *l2fib_swif_seq_num(sw_if_index0),
201 .bd = bd_config->seq_num,
204 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
207 * Process bridge domain feature enables.
208 * To perform learning/flooding/forwarding, the corresponding bit
209 * must be enabled in both the input interface config and in the
210 * bridge domain config. In the bd_bitmap, bits for features other
211 * than learning/flooding/forwarding should always be set.
213 feat_mask = feat_mask & bd_config->feature_bitmap;
215 else if (config->xconnect)
217 /* Set the output interface */
218 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
221 feat_mask = L2INPUT_FEAT_DROP;
223 /* mask out features from bitmap using packet type and bd config */
224 feature_bitmap = config->feature_bitmap & feat_mask;
226 /* save for next feature graph nodes */
227 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
229 /* Determine the next node */
230 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
234 static_always_inline uword
235 l2input_node_inline (vlib_main_t * vm,
236 vlib_node_runtime_t * node, vlib_frame_t * frame,
239 u32 n_left_from, *from, *to_next;
240 l2input_next_t next_index;
241 l2input_main_t *msm = &l2input_main;
243 from = vlib_frame_vector_args (frame);
244 n_left_from = frame->n_vectors; /* number of packets to process */
245 next_index = node->cached_next_index;
247 while (n_left_from > 0)
251 /* get space to enqueue frame to graph node "next_index" */
252 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
254 while (n_left_from >= 8 && n_left_to_next >= 4)
256 u32 bi0, bi1, bi2, bi3;
257 vlib_buffer_t *b0, *b1, *b2, *b3;
258 u32 next0, next1, next2, next3;
259 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
261 /* Prefetch next iteration. */
263 vlib_buffer_t *p4, *p5, *p6, *p7;
265 p4 = vlib_get_buffer (vm, from[4]);
266 p5 = vlib_get_buffer (vm, from[5]);
267 p6 = vlib_get_buffer (vm, from[6]);
268 p7 = vlib_get_buffer (vm, from[7]);
270 /* Prefetch the buffer header and packet for the N+2 loop iteration */
271 vlib_prefetch_buffer_header (p4, LOAD);
272 vlib_prefetch_buffer_header (p5, LOAD);
273 vlib_prefetch_buffer_header (p6, LOAD);
274 vlib_prefetch_buffer_header (p7, LOAD);
276 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
277 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
278 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
279 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
282 * Don't bother prefetching the bridge-domain config (which
283 * depends on the input config above). Only a small number of
284 * bridge domains are expected. Plus the structure is small
285 * and several fit in a cache line.
289 /* speculatively enqueue b0 and b1 to the current next frame */
290 /* bi is "buffer index", b is pointer to the buffer */
291 to_next[0] = bi0 = from[0];
292 to_next[1] = bi1 = from[1];
293 to_next[2] = bi2 = from[2];
294 to_next[3] = bi3 = from[3];
300 b0 = vlib_get_buffer (vm, bi0);
301 b1 = vlib_get_buffer (vm, bi1);
302 b2 = vlib_get_buffer (vm, bi2);
303 b3 = vlib_get_buffer (vm, bi3);
307 /* RX interface handles */
308 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
309 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
310 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
311 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
313 if (b0->flags & VLIB_BUFFER_IS_TRACED)
315 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
317 vlib_add_trace (vm, node, b0, sizeof (*t));
318 t->sw_if_index = sw_if_index0;
319 clib_memcpy (t->src, h0->src_address, 6);
320 clib_memcpy (t->dst, h0->dst_address, 6);
322 if (b1->flags & VLIB_BUFFER_IS_TRACED)
324 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
326 vlib_add_trace (vm, node, b1, sizeof (*t));
327 t->sw_if_index = sw_if_index1;
328 clib_memcpy (t->src, h1->src_address, 6);
329 clib_memcpy (t->dst, h1->dst_address, 6);
331 if (b2->flags & VLIB_BUFFER_IS_TRACED)
333 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
335 vlib_add_trace (vm, node, b2, sizeof (*t));
336 t->sw_if_index = sw_if_index2;
337 clib_memcpy (t->src, h2->src_address, 6);
338 clib_memcpy (t->dst, h2->dst_address, 6);
340 if (b3->flags & VLIB_BUFFER_IS_TRACED)
342 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
344 vlib_add_trace (vm, node, b3, sizeof (*t));
345 t->sw_if_index = sw_if_index3;
346 clib_memcpy (t->src, h3->src_address, 6);
347 clib_memcpy (t->dst, h3->dst_address, 6);
351 vlib_node_increment_counter (vm, l2input_node.index,
352 L2INPUT_ERROR_L2INPUT, 4);
354 classify_and_dispatch (msm, b0, &next0);
355 classify_and_dispatch (msm, b1, &next1);
356 classify_and_dispatch (msm, b2, &next2);
357 classify_and_dispatch (msm, b3, &next3);
359 /* verify speculative enqueues, maybe switch current next frame */
360 /* if next0==next1==next_index then nothing special needs to be done */
361 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
362 to_next, n_left_to_next,
364 next0, next1, next2, next3);
367 while (n_left_from > 0 && n_left_to_next > 0)
374 /* speculatively enqueue b0 to the current next frame */
382 b0 = vlib_get_buffer (vm, bi0);
384 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
386 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
387 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
388 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
389 t->sw_if_index = sw_if_index0;
390 clib_memcpy (t->src, h0->src_address, 6);
391 clib_memcpy (t->dst, h0->dst_address, 6);
394 vlib_node_increment_counter (vm, l2input_node.index,
395 L2INPUT_ERROR_L2INPUT, 1);
397 classify_and_dispatch (msm, b0, &next0);
399 /* verify speculative enqueue, maybe switch current next frame */
400 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
401 to_next, n_left_to_next,
405 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
408 return frame->n_vectors;
412 l2input_node_fn (vlib_main_t * vm,
413 vlib_node_runtime_t * node, vlib_frame_t * frame)
415 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
416 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
417 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
421 VLIB_REGISTER_NODE (l2input_node) = {
422 .function = l2input_node_fn,
424 .vector_size = sizeof (u32),
425 .format_trace = format_l2input_trace,
426 .format_buffer = format_ethernet_header_with_length,
427 .type = VLIB_NODE_TYPE_INTERNAL,
429 .n_errors = ARRAY_LEN(l2input_error_strings),
430 .error_strings = l2input_error_strings,
432 .n_next_nodes = L2INPUT_N_NEXT,
434 /* edit / add dispositions here */
436 [L2INPUT_NEXT_LEARN] = "l2-learn",
437 [L2INPUT_NEXT_FWD] = "l2-fwd",
438 [L2INPUT_NEXT_DROP] = "error-drop",
443 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
444 clib_error_t *l2input_init (vlib_main_t * vm)
446 l2input_main_t *mp = &l2input_main;
449 mp->vnet_main = vnet_get_main ();
451 /* Get packets RX'd from L2 interfaces */
452 ethernet_register_l2_input (vm, l2input_node.index);
454 /* Create the config vector */
455 vec_validate (mp->configs, 100);
456 /* create 100 sw interface entries and zero them */
458 /* Initialize the feature next-node indexes */
459 feat_bitmap_init_next_nodes (vm,
462 l2input_get_feat_names (),
463 mp->feat_next_node_index);
468 VLIB_INIT_FUNCTION (l2input_init);
471 /** Get a pointer to the config for the given interface. */
473 l2input_intf_config (u32 sw_if_index)
475 l2input_main_t *mp = &l2input_main;
477 vec_validate (mp->configs, sw_if_index);
478 return vec_elt_at_index (mp->configs, sw_if_index);
481 /** Enable (or disable) the feature in the bitmap for the given interface. */
483 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable)
485 l2_input_config_t *config = l2input_intf_config (sw_if_index);
488 config->feature_bitmap |= feature_bitmap;
490 config->feature_bitmap &= ~feature_bitmap;
492 return config->feature_bitmap;
496 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
498 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
499 bd_validate (bd_config);
500 bd_config->feature_bitmap =
501 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
502 return bd_config->feature_bitmap;
506 * Set the subinterface to run in l2 or l3 mode.
507 * For L3 mode, just the sw_if_index is specified.
508 * For bridged mode, the bd id and bvi flag are also specified.
509 * For xconnect mode, the peer sw_if_index is also specified.
510 * Return 0 if ok, or non-0 if there was an error.
514 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
515 u32 mode, /* One of L2 modes or back to L3 mode */
516 u32 sw_if_index, /* sw interface index */
517 u32 bd_index, /* for bridged interface */
518 u32 bvi, /* the bridged interface is the BVI */
519 u32 shg, /* the bridged interface split horizon group */
520 u32 xc_sw_if_index) /* peer interface for xconnect */
522 l2input_main_t *mp = &l2input_main;
523 l2output_main_t *l2om = &l2output_main;
524 vnet_main_t *vnm = vnet_get_main ();
525 vnet_hw_interface_t *hi;
526 l2_output_config_t *out_config;
527 l2_input_config_t *config;
528 l2_bridge_domain_t *bd_config;
530 i32 l2_if_adjust = 0;
533 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
534 config = l2input_intf_config (sw_if_index);
538 /* Interface is already in bridge mode. Undo the existing config. */
539 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
541 /* remove interface from flood vector */
542 bd_remove_member (bd_config, sw_if_index);
544 /* undo any BVI-related config */
545 if (bd_config->bvi_sw_if_index == sw_if_index)
547 bd_config->bvi_sw_if_index = ~0;
550 /* delete the l2fib entry for the bvi interface */
551 mac = *((u64 *) hi->hw_address);
552 l2fib_del_entry (mac, config->bd_index);
554 /* Make loop output node send packet back to ethernet-input node */
556 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
558 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
559 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
562 /* Clear MACs learned on the interface */
563 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
564 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
565 l2fib_flush_int_mac (vm, sw_if_index);
569 else if (config->xconnect)
574 /* Make sure vector is big enough */
575 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
578 /* Initialize the l2-input configuration for the interface */
581 /* Set L2 config to BD index 0 so that if any packet accidentally
582 * came in on L2 path, it will be dropped in BD 0 */
583 config->xconnect = 0;
586 config->bd_index = 0;
587 config->feature_bitmap = L2INPUT_FEAT_DROP;
589 /* Clear L2 output config */
590 out_config = l2output_intf_config (sw_if_index);
591 memset (out_config, 0, sizeof (l2_output_config_t));
593 /* Make sure any L2-output packet to this interface now in L3 mode is
594 * dropped. This may happen if L2 FIB MAC entry is stale */
595 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
599 /* Add or update l2-output node next-arc and output_node_index_vec table
600 * for the interface */
601 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
603 if (mode == MODE_L2_BRIDGE)
606 * Remove a check that the interface must be an Ethernet.
607 * Specifically so we can bridge to L3 tunnel interfaces.
609 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
613 return MODE_ERROR_ETH; /* non-ethernet */
615 config->xconnect = 0;
617 config->bd_index = bd_index;
618 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
621 * Enable forwarding, flooding, learning and ARP termination by default
622 * (note that ARP term is disabled on BD feature bitmap by default)
624 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
625 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
627 /* Make sure last-chance drop is configured */
628 config->feature_bitmap |= L2INPUT_FEAT_DROP;
630 /* Make sure xconnect is disabled */
631 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
633 /* Set up bridge domain */
634 bd_config = l2input_bd_config (bd_index);
635 bd_validate (bd_config);
637 /* TODO: think: add l2fib entry even for non-bvi interface? */
639 /* Do BVI interface initializations */
642 /* ensure BD has no bvi interface (or replace that one with this??) */
643 if (bd_config->bvi_sw_if_index != ~0)
645 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
647 bd_config->bvi_sw_if_index = sw_if_index;
650 /* create the l2fib entry for the bvi interface */
651 mac = *((u64 *) hi->hw_address);
652 l2fib_add_fwd_entry (mac, bd_index, sw_if_index, 1, 1); /* static + bvi */
654 /* Disable learning by default. no use since l2fib entry is static. */
655 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
657 /* Make loop output node send packet to l2-input node */
659 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
661 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
662 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
665 /* Add interface to bridge-domain flood vector */
666 l2_flood_member_t member = {
667 .sw_if_index = sw_if_index,
668 .flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL,
671 bd_add_member (bd_config, &member);
674 else if (mode == MODE_L2_XC)
676 config->xconnect = 1;
678 config->output_sw_if_index = xc_sw_if_index;
680 /* Make sure last-chance drop is configured */
681 config->feature_bitmap |= L2INPUT_FEAT_DROP;
683 /* Make sure bridging features are disabled */
684 config->feature_bitmap &=
685 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
687 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
688 shg = 0; /* not used in xconnect */
690 else if (mode == MODE_L2_CLASSIFY)
692 config->xconnect = 1;
694 config->output_sw_if_index = xc_sw_if_index;
696 /* Make sure last-chance drop is configured */
697 config->feature_bitmap |=
698 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
700 /* Make sure bridging features are disabled */
701 config->feature_bitmap &=
702 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
703 shg = 0; /* not used in xconnect */
705 /* Insure all packets go to ethernet-input */
706 ethernet_set_rx_redirect (vnet_main, hi, 1);
709 /* set up split-horizon group and set output feature bit */
711 out_config = l2output_intf_config (sw_if_index);
712 out_config->shg = shg;
713 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
716 * Test: remove this when non-IP features can be configured.
717 * Enable a non-IP feature to test IP feature masking
718 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
724 /* Adjust count of L2 interfaces */
725 hi->l2_if_count += l2_if_adjust;
727 if (hi->hw_class_index == ethernet_hw_interface_class.index)
729 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
731 /* Just added first L2 interface on this port */
733 /* Set promiscuous mode on the l2 interface */
734 ethernet_set_flags (vnet_main, hi->hw_if_index,
735 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
737 /* ensure all packets go to ethernet-input */
738 ethernet_set_rx_redirect (vnet_main, hi, 1);
741 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
743 /* Just removed only L2 subinterface on this port */
745 /* Disable promiscuous mode on the l2 interface */
746 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
748 /* Allow ip packets to go directly to ip4-input etc */
749 ethernet_set_rx_redirect (vnet_main, hi, 0);
753 /* Set up the L2/L3 flag in the interface parsing tables */
754 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
760 * Set subinterface in bridging mode with a bridge-domain ID.
762 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
764 static clib_error_t *
765 int_l2_bridge (vlib_main_t * vm,
766 unformat_input_t * input, vlib_cli_command_t * cmd)
768 vnet_main_t *vnm = vnet_get_main ();
769 clib_error_t *error = 0;
776 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
778 error = clib_error_return (0, "unknown interface `%U'",
779 format_unformat_error, input);
783 if (!unformat (input, "%d", &bd_id))
785 error = clib_error_return (0, "expected bridge domain ID `%U'",
786 format_unformat_error, input);
790 if (bd_id > L2_BD_ID_MAX)
792 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
793 format_unformat_error, input);
796 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
799 bvi = unformat (input, "bvi");
801 /* optional split horizon group */
803 (void) unformat (input, "%d", &shg);
805 /* set the interface mode */
807 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi,
810 if (rc == MODE_ERROR_ETH)
812 error = clib_error_return (0, "bridged interface must be ethernet",
813 format_unformat_error, input);
815 else if (rc == MODE_ERROR_BVI_DEF)
818 clib_error_return (0, "bridge-domain already has a bvi interface",
819 format_unformat_error, input);
823 error = clib_error_return (0, "invalid configuration for interface",
824 format_unformat_error, input);
834 * Use this command put an interface into Layer 2 bridge domain. If a
835 * bridge-domain with the provided bridge-domain-id does not exist, it
836 * will be created. Interfaces in a bridge-domain forward packets to
837 * other interfaces in the same bridge-domain based on destination mac
838 * address. To remove an interface from a the Layer 2 bridge domain,
839 * put the interface in a different mode, for example Layer 3 mode.
841 * Optionally, an interface can be added to a Layer 2 bridge-domain as
842 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
843 * bridge-domain can be a bvi.
845 * Optionally, a split-horizon group can also be specified. This defaults
846 * to 0 if not specified.
849 * Example of how to configure a Layer 2 bridge-domain with three
850 * interfaces (where 200 is the bridge-domain-id):
851 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
852 * This interface is added a BVI interface:
853 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
854 * This interface also has a split-horizon group of 1 specified:
855 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
856 * Example of how to remove an interface from a Layer2 bridge-domain:
857 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
860 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
861 .path = "set interface l2 bridge",
862 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]",
863 .function = int_l2_bridge,
868 * Set subinterface in xconnect mode with another interface.
870 * set interface l2 xconnect <interface> <peer interface>
872 static clib_error_t *
873 int_l2_xc (vlib_main_t * vm,
874 unformat_input_t * input, vlib_cli_command_t * cmd)
876 vnet_main_t *vnm = vnet_get_main ();
877 clib_error_t *error = 0;
881 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
883 error = clib_error_return (0, "unknown interface `%U'",
884 format_unformat_error, input);
889 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
891 error = clib_error_return (0, "unknown peer interface `%U'",
892 format_unformat_error, input);
896 /* set the interface mode */
898 (vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index))
900 error = clib_error_return (0, "invalid configuration for interface",
901 format_unformat_error, input);
910 * Use this command put an interface into Layer 2 cross-connect mode.
911 * Both interfaces must be in this mode for bi-directioal traffic. All
912 * packets received on one interface will be transmitted to the other.
913 * To remove the Layer 2 cross-connect, put the interface in a different
914 * mode, for example Layer 3 mode.
917 * Example of how to configure a Layer2 cross-connect between two interfaces:
918 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
919 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
920 * Example of how to remove a Layer2 cross-connect:
921 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
922 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
925 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
926 .path = "set interface l2 xconnect",
927 .short_help = "set interface l2 xconnect <interface> <peer interface>",
928 .function = int_l2_xc,
933 * Set subinterface in L3 mode.
935 * set interface l3 <interface>
937 static clib_error_t *
938 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
940 vnet_main_t *vnm = vnet_get_main ();
941 clib_error_t *error = 0;
944 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
946 error = clib_error_return (0, "unknown interface `%U'",
947 format_unformat_error, input);
951 /* set the interface mode */
952 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0))
954 error = clib_error_return (0, "invalid configuration for interface",
955 format_unformat_error, input);
964 * Modify the packet processing mode of the interface to Layer 3, which
965 * implies packets will be routed. This is the default mode of an interface.
966 * Use this command to remove an interface from a Layer 2 cross-connect or a
970 * Example of how to set the mode of an interface to Layer 3:
971 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
974 VLIB_CLI_COMMAND (int_l3_cli, static) = {
975 .path = "set interface l3",
976 .short_help = "set interface l3 <interface>",
982 * Show interface mode.
984 * show mode [<if-name1> <if-name2> ...]
986 static clib_error_t *
987 show_int_mode (vlib_main_t * vm,
988 unformat_input_t * input, vlib_cli_command_t * cmd)
990 vnet_main_t *vnm = vnet_get_main ();
991 clib_error_t *error = 0;
994 vnet_interface_main_t *im = &vnm->interface_main;
996 vnet_sw_interface_t *si, *sis = 0;
997 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1001 /* See if user wants to show specific interface */
1003 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1005 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1006 vec_add1 (sis, si[0]);
1010 error = clib_error_return (0, "unknown input `%U'",
1011 format_unformat_error, input);
1016 if (vec_len (sis) == 0) /* Get all interfaces */
1018 /* Gather interfaces. */
1019 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1022 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1026 vec_foreach (si, sis)
1028 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1033 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1035 args = format (0, "bd_id %d%s%d", bd_id,
1036 config->bvi ? " bvi shg " : " shg ", config->shg);
1038 else if (config->xconnect)
1040 mode = "l2 xconnect";
1041 args = format (0, "%U",
1042 format_vnet_sw_if_index_name,
1043 vnm, config->output_sw_if_index);
1048 args = format (0, " ");
1050 vlib_cli_output (vm, "%s %U %v\n",
1052 format_vnet_sw_if_index_name,
1053 vnm, si->sw_if_index, args);
1064 * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge,
1065 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1066 * output to just the provided list of interfaces and sub-interfaces.
1067 * The output shows the mode, the interface, and if the interface is
1068 * a member of a bridge, the bridge-domain-id and the split horizen group (shg).
1071 * Example of displaying the mode of all interfaces:
1072 * @cliexstart{show mode}
1074 * l3 GigabitEthernet0/8/0
1075 * l3 GigabitEthernet0/9/0
1076 * l3 GigabitEthernet0/a/0
1077 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1078 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1079 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1080 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1081 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1083 * Example of displaying the mode of a seleted list of interfaces:
1084 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1085 * l3 GigabitEthernet0/8/0
1086 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1090 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1091 .path = "show mode",
1092 .short_help = "show mode [<if-name1> <if-name2> ...]",
1093 .function = show_int_mode,
1097 #define foreach_l2_init_function \
1098 _(feat_bitmap_drop_init) \
1100 _(l2_input_classify_init) \
1107 _(l2_efp_filter_init) \
1116 l2_init (vlib_main_t * vm)
1118 clib_error_t *error;
1121 if ((error = vlib_call_init_function (vm, a))) return error; } \
1123 foreach_l2_init_function;
1128 VLIB_INIT_FUNCTION (l2_init);
1131 * fd.io coding-style-patch-verification: ON
1134 * eval: (c-set-style "gnu")