The outer vlan should be copied from source packet buffer to
support double vlan stripping and insertion, as double vlan can be
stripped or inserted by some of NIC hardware.

Signed-off-by: Helin Zhang <redacted>
---
 examples/ipv4_multicast/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/examples/ipv4_multicast/main.c b/examples/ipv4_multicast/main.c
index 2a2b915..d4253c0 100644
--- a/examples/ipv4_multicast/main.c
+++ b/examples/ipv4_multicast/main.c

@@ -298,6 +298,7 @@ mcast_out_pkt(struct rte_mbuf *pkt, int use_clone)
 	/* copy metadata from source packet*/
 	hdr->port = pkt->port;
 	hdr->vlan_tci = pkt->vlan_tci;
+	hdr->vlan_tci_outer = pkt->vlan_tci_outer;
 	hdr->tx_offload = pkt->tx_offload;
 	hdr->hash = pkt->hash;
 

-- 
1.9.3