Fix MTU size for the bonded interface

Configure the MTU/L3 packet size of the bonded interface
as the lowest value of the slave intefaces

Change-Id: I34fb4c2156e8ad3d9bf45efe332405d53f72867c
Signed-off-by: Steve Shin <jonshin@cisco.com>

diff --git a/vnet/vnet/devices/dpdk/init.c b/vnet/vnet/devices/dpdk/init.c
index 2ecfa38..3de33ed 100644 (file)
--- a/vnet/vnet/devices/dpdk/init.c
+++ b/vnet/vnet/devices/dpdk/init.c
@@ -1688,6 +1688,7 @@ dpdk_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
                    clib_memcpy (bhi->hw_address, addr, 6);
                    clib_memcpy (bei->address, addr, 6);
                    /* Init l3 packet size allowed on bonded interface */
+                   bhi->max_packet_bytes = ETHERNET_MAX_PACKET_BYTES;
                    bhi->max_l3_packet_bytes[VLIB_RX] =
                      bhi->max_l3_packet_bytes[VLIB_TX] =
                      ETHERNET_MAX_PACKET_BYTES - sizeof (ethernet_header_t);
@@ -1713,6 +1714,17 @@ dpdk_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
                          vnet_get_sw_interface (vnm, sdev->vlib_sw_if_index);
                        shi->bond_info = VNET_HW_INTERFACE_BOND_INFO_SLAVE;
                        ssi->flags |= VNET_SW_INTERFACE_FLAG_BOND_SLAVE;
+
+                       /* Set l3 packet size allowed as the lowest of slave */
+                       if (bhi->max_l3_packet_bytes[VLIB_RX] >
+                           shi->max_l3_packet_bytes[VLIB_RX])
+                         bhi->max_l3_packet_bytes[VLIB_RX] =
+                           bhi->max_l3_packet_bytes[VLIB_TX] =
+                           shi->max_l3_packet_bytes[VLIB_RX];
+
+                       /* Set max packet size allowed as the lowest of slave */
+                       if (bhi->max_packet_bytes > shi->max_packet_bytes)
+                         bhi->max_packet_bytes = shi->max_packet_bytes;
                      }
                  }
              }