X670 connected to other VPLS capable device who can't use manual settings for vc type. When created pseudowire with tagged type, connection stay down and in dump we see label mapping messages with VC type 0x0004 (Ethernet VLAN) from other device and 0x0005 (Ethernet ) from Extreme. As know from another conversation Extreme must use automatic negotiating VC type, but it is not working.