From 0bc3e01c9bf653c3a4a449bff92b5c8878afb039 Mon Sep 17 00:00:00 2001
From: Pim van Pelt <pim@ipng.nl>
Date: Tue, 8 Mar 2022 14:45:35 +0000
Subject: [PATCH] Backport https://gerrit.fd.io/r/c/vpp/+/35528

---
 lcpng_interface.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lcpng_interface.c b/lcpng_interface.c
index 9b70bed..f15af0e 100644
--- a/lcpng_interface.c
+++ b/lcpng_interface.c
@@ -753,6 +753,9 @@ lcp_itf_pair_find_by_outer_vlan (u32 sup_if_index, u16 vlan, bool dot1ad)
   return lip_db_by_phy[match.matched_sw_if_index];
 }
 
+static clib_error_t *lcp_itf_pair_link_up_down (vnet_main_t *vnm,
+						u32 hw_if_index, u32 flags);
+
 int
 lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
 		     lip_host_type_t host_if_type, u8 *ns,
@@ -1051,6 +1054,16 @@ lcp_itf_pair_create (u32 phy_sw_if_index, u8 *host_if_name,
       lip = lcp_itf_pair_get (lcp_itf_pair_find_by_vif (vif_index));
       lcp_itf_pair_sync_state (lip);
     }
+  /*
+   * Reflect current link state and link speed of the hardware interface
+   * on the TAP interface.
+   */
+  if (host_if_type == LCP_ITF_HOST_TAP &&
+      !vnet_sw_interface_is_sub (vnm, phy_sw_if_index))
+    {
+      hw = vnet_get_sup_hw_interface (vnm, phy_sw_if_index);
+      lcp_itf_pair_link_up_down (vnm, hw->hw_if_index, hw->flags);
+    }
 
   if (host_sw_if_indexp)
     *host_sw_if_indexp = host_sw_if_index;