HP 10500 SERIES Configuration Manual page 175

H-VPLS with LSP access
Figure 40 H-VPLS with LSP access
As shown in
It does not establish virtual links with any other peers.
Data forwarding in H-VPLS with LSP access is as follows:
Upon receiving a packet from a CE, UPE tags the packet with the MPLS label for the U-PW, namely,
1.
"the multiplex distinguishing flag," and then sends the packet to NPE 1.
When receiving the packet, NPE 1 determines which VSI the packet belongs to by the label and,
2.
based on the destination MAC address of the packet, tags the packet with the multiplex
distinguishing flag for the N-PW, and forwards the packet.
Upon receiving the packet from the N-PW, NPE 1 tags the packet with the multiplex distinguishing
3.
flag for the U-PW and sends the packet to UPE, which forwards the packet to the CE.
For packets to be exchanged between CE 1 and CE 2, UPE can forward them directly without NPE 1
because it holds the bridging function by itself. For the first packet with an unknown destination MAC
address or a broadcast packet, UPE broadcasts the packet to CE 2 through the bridging function and, at
the same time, forwards it through U-PW to NPE 1, which replicates the packet and sends a copy to each
peer CE.
H-VPLS with QinQ access
Figure 41 H-VPLS with QinQ access
As shown in
connected to CEs.
Data forwarding in H-VPLS with QinQ access is as follows:
Upon receiving a packet from a CE, MTU labels the packet with a VLAN tag as the multiplex
1.
distinguishing flag, and transparently sends the packet to PE 1 through the QinQ tunnel.
Figure 40, UPE functions as the MTU-s and establishes only a virtual link U-PW with NPE 1.
Figure 41, MTU is a standard bridging device and QinQ is enabled on its interfaces
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