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zebra: dup addr detect mac consolidation
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
This commit is contained in:
Chirag Shah
parent
7510e45925
commit
bdca1974e1
@ -193,6 +193,12 @@ static void zebra_vxlan_dup_addr_detect_for_neigh(struct zebra_vrf *zvrf,
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bool do_dad,
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bool do_dad,
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bool *is_dup_detect,
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bool *is_dup_detect,
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bool is_local);
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bool is_local);
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static void zebra_vxlan_dup_addr_detect_for_mac(struct zebra_vrf *zvrf,
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zebra_mac_t *mac,
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struct in_addr vtep_ip,
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bool do_dad,
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bool *is_dup_detect,
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bool is_local);
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/* Private functions */
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/* Private functions */
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static int host_rb_entry_compare(const struct host_rb_entry *hle1,
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static int host_rb_entry_compare(const struct host_rb_entry *hle1,
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@ -370,6 +376,159 @@ static int zebra_vxlan_ip_inherit_dad_from_mac(struct zebra_vrf *zvrf,
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return 0;
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return 0;
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}
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}
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static void zebra_vxlan_dup_addr_detect_for_mac(struct zebra_vrf *zvrf,
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zebra_mac_t *mac,
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struct in_addr vtep_ip,
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bool do_dad,
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bool *is_dup_detect,
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bool is_local)
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{
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zebra_neigh_t *nbr;
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struct listnode *node = NULL;
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struct timeval elapsed = {0, 0};
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char buf[ETHER_ADDR_STRLEN];
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char buf1[INET6_ADDRSTRLEN];
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bool reset_params = false;
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if (!(zvrf->dup_addr_detect && do_dad))
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return;
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/* MAC is detected as duplicate,
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* Local MAC event -> hold on advertising to BGP.
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* Remote MAC event -> hold on installing it.
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*/
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if (CHECK_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE)) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug(
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"%s: duplicate addr MAC %s flags 0x%x skip update to client, learn count %u recover time %u",
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__PRETTY_FUNCTION__,
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prefix_mac2str(&mac->macaddr, buf,
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sizeof(buf)),
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mac->flags, mac->dad_count,
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zvrf->dad_freeze_time);
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/* For duplicate MAC do not update
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* client but update neigh due to
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* this MAC update.
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*/
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if (zvrf->dad_freeze)
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*is_dup_detect = false;
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return;
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}
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/* Check if detection time (M-secs) expired.
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* Reset learn count and detection start time.
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*/
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monotime_since(&mac->detect_start_time, &elapsed);
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reset_params = (elapsed.tv_sec > zvrf->dad_time);
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if (is_local && !reset_params) {
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/* RFC-7432: A PE/VTEP that detects a MAC mobility
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* event via LOCAL learning starts an M-second timer.
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*
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* NOTE: This is the START of the probe with count is
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* 0 during LOCAL learn event.
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* (mac->dad_count == 0 || elapsed.tv_sec >= zvrf->dad_time)
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*/
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reset_params = !mac->dad_count;
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}
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if (reset_params) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug(
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"%s: duplicate addr MAC %s flags 0x%x detection time passed, reset learn count %u"
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, __PRETTY_FUNCTION__,
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prefix_mac2str(&mac->macaddr, buf,
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sizeof(buf)),
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mac->flags, mac->dad_count);
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mac->dad_count = 0;
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/* Start dup. addr detection (DAD) start time,
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* ONLY during LOCAL learn.
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*/
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if (is_local)
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monotime(&mac->detect_start_time);
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} else if (!is_local) {
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/* For REMOTE MAC, increment detection count
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* ONLY while in probe window, once window passed,
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* next local learn event should trigger DAD.
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*/
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mac->dad_count++;
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}
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/* For LOCAL MAC learn event, once count is reset above via either
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* initial/start detection time or passed the probe time, the count
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* needs to be incremented.
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*/
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if (is_local)
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mac->dad_count++;
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zlog_debug("%s: MAC DAD %s dad_count %u ",
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__PRETTY_FUNCTION__,
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prefix_mac2str(&mac->macaddr, buf, sizeof(buf)),
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mac->dad_count);
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if (mac->dad_count >= zvrf->dad_max_moves) {
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flog_warn(EC_ZEBRA_DUP_MAC_DETECTED,
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"VNI %u: MAC %s detected as duplicate during %s VTEP %s",
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mac->zvni->vni,
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prefix_mac2str(&mac->macaddr, buf, sizeof(buf)),
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is_local ? "local update, last" :
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"remote update, from", inet_ntoa(vtep_ip));
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SET_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE);
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/* Capture Duplicate detection time */
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mac->dad_dup_detect_time = monotime(NULL);
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/* Mark all IPs/Neighs as duplicate
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* associcated with this MAC
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*/
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for (ALL_LIST_ELEMENTS_RO(mac->neigh_list, node, nbr)) {
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/* Ony Mark IPs which are Local */
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if (!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL))
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continue;
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SET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
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nbr->dad_dup_detect_time = monotime(NULL);
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flog_warn(EC_ZEBRA_DUP_IP_INHERIT_DETECTED,
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"VNI %u: MAC %s IP %s detected as duplicate during %s update, inherit duplicate from MAC",
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mac->zvni->vni,
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prefix_mac2str(&mac->macaddr,
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buf, sizeof(buf)),
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ipaddr2str(&nbr->ip, buf1, sizeof(buf1)),
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is_local ? "local" : "remote");
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}
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/* Start auto recovery timer for this MAC */
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THREAD_OFF(mac->dad_mac_auto_recovery_timer);
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if (zvrf->dad_freeze && zvrf->dad_freeze_time) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug(
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"%s: duplicate addr MAC %s flags 0x%x auto recovery time %u start"
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, __PRETTY_FUNCTION__,
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prefix_mac2str(&mac->macaddr, buf,
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sizeof(buf)),
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mac->flags, zvrf->dad_freeze_time);
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thread_add_timer(zebrad.master,
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zebra_vxlan_dad_mac_auto_recovery_exp,
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mac, zvrf->dad_freeze_time,
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&mac->dad_mac_auto_recovery_timer);
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}
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/* Do not inform to client (BGPd),
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* upd_neigh for neigh sequence change.
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*/
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if (zvrf->dad_freeze)
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*is_dup_detect = false;
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}
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}
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static void zebra_vxlan_dup_addr_detect_for_neigh(struct zebra_vrf *zvrf,
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static void zebra_vxlan_dup_addr_detect_for_neigh(struct zebra_vrf *zvrf,
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zebra_neigh_t *nbr,
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zebra_neigh_t *nbr,
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struct in_addr vtep_ip,
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struct in_addr vtep_ip,
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@ -4605,8 +4764,6 @@ static void process_remote_macip_add(vni_t vni,
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bool is_router;
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bool is_router;
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bool do_dad = false;
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bool do_dad = false;
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bool is_dup_detect = false;
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bool is_dup_detect = false;
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struct listnode *node = NULL;
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struct timeval elapsed = {0, 0};
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/* Locate VNI hash entry - expected to exist. */
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/* Locate VNI hash entry - expected to exist. */
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zvni = zvni_lookup(vni);
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zvni = zvni_lookup(vni);
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@ -4762,114 +4919,11 @@ static void process_remote_macip_add(vni_t vni,
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else
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else
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UNSET_FLAG(mac->flags, ZEBRA_MAC_REMOTE_DEF_GW);
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UNSET_FLAG(mac->flags, ZEBRA_MAC_REMOTE_DEF_GW);
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if (zvrf->dup_addr_detect && do_dad) {
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zebra_vxlan_dup_addr_detect_for_mac(zvrf, mac,
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/* MAC is detected as duplicate, hold on to
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mac->fwd_info.r_vtep_ip,
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* install as remote entry.
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do_dad, &is_dup_detect,
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*/
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false);
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if (CHECK_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE)) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug(
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"%s: duplicate addr MAC %s skip installing, learn count %u recover time %u",
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__PRETTY_FUNCTION__,
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prefix_mac2str(macaddr,
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buf, sizeof(buf)),
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mac->dad_count,
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zvrf->dad_freeze_time);
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/* Do not install MAC but process neigh
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* due to the remote MAC add.
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*/
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goto process_neigh;
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}
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/* Check if detection time (M-secs) expired.
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* Reset learn count and detection start time.
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*/
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monotime_since(&mac->detect_start_time, &elapsed);
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if (elapsed.tv_sec > zvrf->dad_time) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug("%s: duplicate addr MAC %s flags 0%x detection time passed, reset learn count %u",
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__PRETTY_FUNCTION__,
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prefix_mac2str(macaddr, buf,
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sizeof(buf)),
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mac->flags, mac->dad_count);
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/* Reset learn count but do not start detection
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* during remote learn.
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* Next local learn event start time wil be
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* resetted.
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*/
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mac->dad_count = 0;
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} else {
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/* Increment detection count while in probe
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* window
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*/
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mac->dad_count++;
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}
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if (mac->dad_count >= zvrf->dad_max_moves) {
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flog_warn(EC_ZEBRA_DUP_MAC_DETECTED,
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"VNI %u: MAC %s detected as duplicate during remote update, from VTEP %s",
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zvni->vni,
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prefix_mac2str(&mac->macaddr,
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buf, sizeof(buf)),
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inet_ntoa(mac->fwd_info.r_vtep_ip));
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SET_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE);
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/* Capture Duplicate detection time */
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mac->dad_dup_detect_time = monotime(NULL);
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/* Mark all IPs/Neighs as duplicate associcated
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* with this MAC
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*/
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for (ALL_LIST_ELEMENTS_RO(mac->neigh_list,
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node, n)) {
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/* Ony Mark IPs which are Remote */
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if (!CHECK_FLAG(n->flags,
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ZEBRA_NEIGH_REMOTE))
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continue;
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SET_FLAG(n->flags,
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ZEBRA_NEIGH_DUPLICATE);
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/* Capture Duplicate detection time */
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n->dad_dup_detect_time = monotime(NULL);
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flog_warn(
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EC_ZEBRA_DUP_IP_INHERIT_DETECTED,
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"VNI %u: MAC %s IP %s detected as duplicate during remote update, inherit duplicate from MAC",
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zvni->vni,
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prefix_mac2str(&mac->macaddr,
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buf, sizeof(buf)),
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ipaddr2str(&n->ip, buf1,
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sizeof(buf1)));
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}
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/* Start auto recovery timer for this
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* MAC
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*/
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THREAD_OFF(mac->dad_mac_auto_recovery_timer);
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if (zvrf->dad_freeze && zvrf->dad_freeze_time) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug("%s: duplicate addr MAC %s flags 0%x auto recovery time %u start",
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__PRETTY_FUNCTION__,
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prefix_mac2str(&mac->macaddr,
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buf, sizeof(buf)),
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mac->flags,
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zvrf->dad_freeze_time);
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thread_add_timer(zebrad.master,
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zebra_vxlan_dad_mac_auto_recovery_exp,
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mac,
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zvrf->dad_freeze_time,
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&mac->dad_mac_auto_recovery_timer);
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}
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if (zvrf->dad_freeze)
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is_dup_detect = true;
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}
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}
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process_neigh:
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zvni_process_neigh_on_remote_mac_add(zvni, mac);
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zvni_process_neigh_on_remote_mac_add(zvni, mac);
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/* Install the entry. */
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/* Install the entry. */
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@ -6990,11 +7044,7 @@ int zebra_vxlan_local_mac_add_update(struct interface *ifp,
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bool mac_sticky = false;
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bool mac_sticky = false;
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bool inform_client = false;
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bool inform_client = false;
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bool upd_neigh = false;
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bool upd_neigh = false;
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zebra_neigh_t *n = NULL;
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struct listnode *node = NULL;
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struct in_addr vtep_ip = {.s_addr = 0};
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struct in_addr vtep_ip = {.s_addr = 0};
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struct timeval elapsed = {0, 0};
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char buf2[INET6_ADDRSTRLEN];
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/* We are interested in MACs only on ports or (port, VLAN) that
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/* We are interested in MACs only on ports or (port, VLAN) that
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* map to a VNI.
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* map to a VNI.
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@ -7139,136 +7189,13 @@ int zebra_vxlan_local_mac_add_update(struct interface *ifp,
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inform_client = true;
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inform_client = true;
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upd_neigh = true;
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upd_neigh = true;
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if (zvrf->dup_addr_detect && do_dad) {
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zebra_vxlan_dup_addr_detect_for_mac(zvrf, mac, vtep_ip,
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/* MAC is detected as duplicate, hold on
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do_dad,
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* advertising to BGP.
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&inform_client,
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*/
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true);
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if (CHECK_FLAG(mac->flags,
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ZEBRA_MAC_DUPLICATE)) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug(
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"%s: duplicate addr MAC %s skip update to client, learn count %u recover time %u",
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__PRETTY_FUNCTION__,
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prefix_mac2str(macaddr,
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buf, sizeof(buf)),
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mac->dad_count,
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zvrf->dad_freeze_time);
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/* For duplicate MAC do not update
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* client but update neigh due to
|
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* this MAC update.
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*/
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if (zvrf->dad_freeze)
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inform_client = false;
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goto send_notif;
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}
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/* Check if detection time (M-secs) expired.
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* Reset learn count and detection start time.
|
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*/
|
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monotime_since(&mac->detect_start_time,
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&elapsed);
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if (mac->dad_count == 0 ||
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elapsed.tv_sec >= zvrf->dad_time) {
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if (IS_ZEBRA_DEBUG_VXLAN)
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zlog_debug("%s: duplicate addr MAC %s flags 0x%x detection time passed, reset learn count %u",
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__PRETTY_FUNCTION__,
|
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prefix_mac2str(
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macaddr, buf,
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|
||||||
sizeof(buf)),
|
|
||||||
mac->flags,
|
|
||||||
mac->dad_count);
|
|
||||||
|
|
||||||
mac->dad_count = 0;
|
|
||||||
/* Capture start dup. detection time */
|
|
||||||
monotime(&mac->detect_start_time);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Increment move count */
|
|
||||||
mac->dad_count++;
|
|
||||||
|
|
||||||
if (mac->dad_count >= zvrf->dad_max_moves) {
|
|
||||||
flog_warn(EC_ZEBRA_DUP_MAC_DETECTED,
|
|
||||||
"VNI %u: MAC %s detected as duplicate during local update, last VTEP %s",
|
|
||||||
zvni->vni,
|
|
||||||
prefix_mac2str(&mac->macaddr,
|
|
||||||
buf, sizeof(buf)),
|
|
||||||
inet_ntoa(vtep_ip));
|
|
||||||
|
|
||||||
SET_FLAG(mac->flags,
|
|
||||||
ZEBRA_MAC_DUPLICATE);
|
|
||||||
|
|
||||||
/* Capture Duplicate detection time */
|
|
||||||
mac->dad_dup_detect_time =
|
|
||||||
monotime(NULL);
|
|
||||||
|
|
||||||
/* Mark all IPs/Neighs as duplicate
|
|
||||||
* associcated with this MAC
|
|
||||||
*/
|
|
||||||
for (ALL_LIST_ELEMENTS_RO(
|
|
||||||
mac->neigh_list,
|
|
||||||
node, n)) {
|
|
||||||
|
|
||||||
/* Ony Mark IPs which are Local
|
|
||||||
*/
|
|
||||||
if (!CHECK_FLAG(n->flags,
|
|
||||||
ZEBRA_NEIGH_LOCAL))
|
|
||||||
continue;
|
|
||||||
|
|
||||||
SET_FLAG(n->flags,
|
|
||||||
ZEBRA_NEIGH_DUPLICATE);
|
|
||||||
|
|
||||||
n->dad_dup_detect_time =
|
|
||||||
monotime(NULL);
|
|
||||||
|
|
||||||
flog_warn(
|
|
||||||
EC_ZEBRA_DUP_IP_INHERIT_DETECTED
|
|
||||||
,
|
|
||||||
"VNI %u: MAC %s IP %s detected as duplicate during local update, inherit duplicate from MAC",
|
|
||||||
zvni->vni,
|
|
||||||
prefix_mac2str(&mac->macaddr,
|
|
||||||
buf, sizeof(buf)),
|
|
||||||
ipaddr2str(&n->ip, buf2,
|
|
||||||
sizeof(buf2)));
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Start auto recovery timer for this
|
|
||||||
* MAC
|
|
||||||
*/
|
|
||||||
THREAD_OFF(
|
|
||||||
mac->dad_mac_auto_recovery_timer);
|
|
||||||
if (zvrf->dad_freeze &&
|
|
||||||
zvrf->dad_freeze_time) {
|
|
||||||
if (IS_ZEBRA_DEBUG_VXLAN)
|
|
||||||
zlog_debug("%s: duplicate addr MAC %s flags 0x%x auto recovery time %u start",
|
|
||||||
__PRETTY_FUNCTION__,
|
|
||||||
prefix_mac2str(
|
|
||||||
&mac->macaddr,
|
|
||||||
buf,
|
|
||||||
sizeof(buf)),
|
|
||||||
mac->flags,
|
|
||||||
zvrf->dad_freeze_time);
|
|
||||||
|
|
||||||
thread_add_timer(zebrad.master,
|
|
||||||
zebra_vxlan_dad_mac_auto_recovery_exp,
|
|
||||||
mac,
|
|
||||||
zvrf->dad_freeze_time,
|
|
||||||
&mac->dad_mac_auto_recovery_timer);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Do not inform to client (BGPd),
|
|
||||||
* upd_neigh for neigh sequence change.
|
|
||||||
*/
|
|
||||||
if (zvrf->dad_freeze)
|
|
||||||
inform_client = false;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
send_notif:
|
|
||||||
|
|
||||||
/* Inform BGP if required. */
|
/* Inform BGP if required. */
|
||||||
if (inform_client) {
|
if (inform_client) {
|
||||||
if (zvni_mac_send_add_to_client(zvni->vni, macaddr,
|
if (zvni_mac_send_add_to_client(zvni->vni, macaddr,
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user