diff options
Diffstat (limited to 'MdeModulePkg/Universal/Network/Ip4Dxe')
| -rw-r--r-- | MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c index 1b7fa4e603..5e297821a2 100644 --- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c +++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c @@ -291,6 +291,12 @@ Ip4CreateService ( InsertHeadList (&IpSb->Interfaces, &IpSb->DefaultInterface->Link);
IpSb->MaxPacketSize = IpSb->SnpMode.MaxPacketSize - sizeof (IP4_HEAD);
+ if (NetLibGetVlanId (IpSb->Controller) != 0) {
+ //
+ // This is a VLAN device, reduce MTU by VLAN tag length
+ //
+ IpSb->MaxPacketSize -= NET_VLAN_TAG_LEN;
+ }
IpSb->MacString = NULL;
*Service = IpSb;
|