Table 1 compares four VLL modes.
Implementation |
VC Label Distribution Mode |
PW Signaling Protocol |
Characteristics |
|---|---|---|---|
CCC |
Manually specified |
None |
This mode establishes one-layer static LSP tunnels for VC information transmission. |
Martini |
Randomly distributed by the system |
LDP |
This mode establishes two layers of tunnels. The outer tunnel is a public network tunnel used to transparently transmit data, and the inner tunnels are identified by VC labels distributed by the system. |
SVC |
Manually specified |
None |
This mode establishes two layers of tunnels. The outer tunnel is a public network tunnel used to transparently transmit data, and the inner tunnels are identified by VC labels that are manually specified. |
Kompella |
Distributed by the system after label block calculation |
BGP |
This mode establishes two layers of tunnels. The outer tunnel is a public network tunnel used to transparently transmit data, and the inner tunnels are identified by VC labels. |