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VPWS CCC & SVC

VPWS CCC & SVC

Created: Jan 14, 2020 18:38:35Latest reply: Jan 14, 2020 20:37:35 658 2 0 0 0
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Hello,,,what is the different b/w VPWS CCC & SVC ?

and the same terms used in VPLS then whats the difference as these all used in both VPWS & VPLS.?

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ejcastriver
Created Jan 14, 2020 20:37:35

The differences between CCC & SVC are the following:
- In CCC mode (one label), static LSPs need to be established and these LSPs can only be used to transfer the data of the CCC connection. SVC needs two labels, the outer label (generated by LDP LSP, MPLS TE, GRE) which forms the LSP can be used for other traffic while the inner label needs to be allocated manually.
- SVC doesn't support local connections while CCC does it. A PE can switch traffic between two CEs connected to it without any static LSP configured ([PEx] ccc siteA1-siteA2 interface E 0/0/1 out-interface E 0/0/2).
- CCC mode doesn't require label signaling to set up the LSP which reduces the amount of resources consumed.
- Maintenance of CCC is inconvenient and scalability is poor.
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gabo.lr
gabo.lr Created Jan 14, 2020 19:39:01

Hello @LSA
The difference between VPWS CCC & SVC is that in the first no control packets need to be transmitted, and no signaling negotiation is required. Meanwhile VPWS SVC uses manually configured VC labels for data transmission.The SVC mode can be regarded as the simplified Martini mode.
As far as I know, CCC & SVC are VPWS implementation modes, and therefore are not used in VPLS.
Best regards!!
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ejcastriver
ejcastriver Created Jan 14, 2020 20:37:35

The differences between CCC & SVC are the following:
- In CCC mode (one label), static LSPs need to be established and these LSPs can only be used to transfer the data of the CCC connection. SVC needs two labels, the outer label (generated by LDP LSP, MPLS TE, GRE) which forms the LSP can be used for other traffic while the inner label needs to be allocated manually.
- SVC doesn't support local connections while CCC does it. A PE can switch traffic between two CEs connected to it without any static LSP configured ([PEx] ccc siteA1-siteA2 interface E 0/0/1 out-interface E 0/0/2).
- CCC mode doesn't require label signaling to set up the LSP which reduces the amount of resources consumed.
- Maintenance of CCC is inconvenient and scalability is poor.
View more
  • x
  • convention：
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