hello every body i have some questions if any one can answer me please ,
does MPLS consider a wan technology like frame-relay or ppp or it is only to make router looking at routing table faster because when i make configuration of MPLS on interface and i make # sh int S0/0 i found this interface run HDLC so mpls require layer 2 technology first is this right or what ?
and does mpls work on switches or router only ?
and another thing if the router look only to the label not the IP packet what will happen to the field in the packet like TTL and the CRC in the L3 header does the router will change them or will not see them only see the label number and forward
another one in stp
does port-fast send any bpdu towards PCs or it receive only ?