a. The MPLS network below provides VPLS service for customers A and B. For client A, flows from Site 3 to Site 2 use the path PE3-P3- P1- PE2; for client B, flows from Site 3 to Site 2 use the path PE3-P3- P2- PE2. Assume that PHP is not used, and that the LSPs do not belong to the same FEC. Show the MPLS tables for all MPLS nodes involved (PE2, PE3, P1, P2 and P3). Clearly indicate where LSP and VC labels are pushed, popped and swapped.

 

b. This MPLS network has an OTN transport infrastructure with GFP-F used for framing. Assume that client traffic for both L2VPNs is Ethernet. For VPN B traffic from Site 3 to Site 2, sketch the frame contents for each link from CEB3 to CEB2, clearly identifying all labels and protocol fields if all client flows represent TCP/IP connections. Make sure you indicate the size of each field. Assume no GFP extension header or optional FCS. All MPLS labels, including VC labels, are of course 4 bytes in length. 

c. Assume SR-MPLS is used as a VPN transport technology instead of regular MPLS, and that only Adjacency SIDs are used. For the same LSPs as in part (a) between Sites 3 and 2 for both customers, show the labels on each link between customer edge routers. Again, assume that PHP is not used. Clearly indicate where labels are pushed, popped and swapped.

 

Transcribed Image Text:

VPN B/Site 1 10.1/16 CE² B1 CEAI 10.1/16 CE¹ BI VPN A/Site 1 PE₁ P3 10.2/16 CEA2 CEB3 PE VPN A/Site 2 P2 CEB2 CEA3 10.4/16 MPLS VPN VPN B/Site 3 10.2/16 VPN B/Site 2 10.3/16 VPN A/Site 3 Ⓒ2000, Cace Systems, Inc. VPN B/Site 1 10.1/16 CE² B1 CEAI 10.1/16 CE¹ BI VPN A/Site 1 PE₁ P3 10.2/16 CEA2 CEB3 PE VPN A/Site 2 P2 CEB2 CEA3 10.4/16 MPLS VPN VPN B/Site 3 10.2/16 VPN B/Site 2 10.3/16 VPN A/Site 3 Ⓒ2000, Cace Systems, Inc.

Answer rating: 100% (QA)

Given the complexity of the MPLS network and the fact that it is a visual task I cannot provide an exact MPLS table but I can give you a general idea ... View the full answer