HP 10500 SERIES Configuration Manual page 205

Table 1 compares the implementaion modes of MPLS L2VPN.
Table 1 Comparing MPLS L2VPN implementation modes
VC label encapsulation
Mode
and distribution
VC label encapsulation:
one level of label
CCC
VC label distribution:
static configuration
VC label encapsulation:
two levels of labels
SVC
VC label distribution:
static configuration
VC label encapsulation:
two levels of labels
Martini
VC label distribution: LDP
VC label encapsulation:
two levels of labels
Kompella
VC label distribution:
BGP
Advantages and disadvantages
Advantanges:
•
Requires no signaling protocol and occupies
fewer network resources.
•
Network devices only need to support MPLS.
•
Better QoS for service traffic as LSPs are
exclusive to CCC connections.
Disadvantages:
•
Configuration and maintenance are
complicated. You must configure two static LSPs
in opposite directions for each CCC connection
on each P device.
•
Cannot automatically adapt to network
changes.
Advantage: Requires no signaling protocol and
occupies few network resources.
Disadvantage:
•
Cannot automatically adapt to network
changes.
•
Supports only remote connections.
Advantages:
•
On a carrier network, only PEs need to save a
few VC label to LSP mappings. The P devices do
not need to save any Layer 2 VPN information.
•
To add a new VC, you only need to configure
the PEs of the VC, without interrupting network
operation.
Disadvantage: Supports only remote connections.
Advantages:
•
Introduces the concept of VPN to prevent CEs in
different VPNs from communicating with each
other.
•
Uses label blocks to assign additional labels to
user VPNs for future use, greatly reducing the
VPN deployment and configuration workload
in the case of expansion.
•
To add a CE to the network, you only need to
configure the PE to which the CE is connected.
The configuration workload is small and does
not interrupt network operation.
Disadvantage: The implemetation is relatively
complicated.
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Application
secnario
Small-scale
network with a
simple
topology
where all
network
devices
support MPLS.
Small-scale
network with a
simple
topology.
Sparse Layer 2
connections,
such as a star
topology.
Full-mesh
network.