Table 1 describes the differences between VPWS implementation modes.
Implementation Mode |
Signaling Protocol |
Tunnel |
Usage Scenario |
Scalability |
Support for Local Connections |
|---|---|---|---|---|---|
Circuit cross connect (CCC) |
None |
Local CCC (public network tunnels not needed) |
N/A |
Comparatively poor |
Yes |
LDP |
LDP |
Needs a shared LSP tunnel. |
Sparse mode |
Poor |
No |
PWE3 |
LDP |
Needs a shared LSP tunnel. |
Sparse mode |
Poor |
No |
Static virtual circuit (SVC) |
None |
Needs a shared LSP tunnel. |
N/A |
Poor |
No |