3com 3031 Instruccion De Instalación
756
C
HAPTER
55: MPLS L2VPN C
ONFIGURATION
Perform the following in the MPLS L2VPN View.
Creating CE and
Configuring CE
Connection
Creating CE
You need create on PE a CE which is consistent with the one physically connected
to PE and specify a unique ID for it. You can also specify the CE range.
to PE and specify a unique ID for it. You can also specify the CE range.
Perform the following in the MPLS L2VPN View.
CE ID uniquely identifies a CE in a VPN, so it must be unique in a VPN. For the sake
of convenience, you are recommended to number the CE IDs from 1 and with
consecutive natural number.
of convenience, you are recommended to number the CE IDs from 1 and with
consecutive natural number.
CE range indicates how many other CEs a CE can be connected to at most. If label
resource is sufficient (which is often the case), you can set a CE range larger than
the actual needs taking in account the future VPN size. Then you can minimize the
modification in future if it is required to add CEs into the VPN in later expansion.
resource is sufficient (which is often the case), you can set a CE range larger than
the actual needs taking in account the future VPN size. Then you can minimize the
modification in future if it is required to add CEs into the VPN in later expansion.
You have to modify the preset CE range if it is less than the needs in VPN
expansion. For example, if current CE range is 10, while 20 CEs are required in
expansion, you need to modify the value to 20. The existing ten links will not be
cut off in modifying CE range, since the system just applies for another block of 10
labels, instead of releasing the existing label block and applying for another block
of 20 labels.
expansion. For example, if current CE range is 10, while 20 CEs are required in
expansion, you need to modify the value to 20. The existing ten links will not be
cut off in modifying CE range, since the system just applies for another block of 10
labels, instead of releasing the existing label block and applying for another block
of 20 labels.
Suppose a corporation has ten CEs in its VPN, but the expanded network may
have 20 CEs, so you can set the CE range as 20. Then the system will allocate
labels for the future ten CEs in advance, so you only need to modify those CEs
newly connected to the PE in future expansion.
have 20 CEs, so you can set the CE range as 20. Then the system will allocate
labels for the future ten CEs in advance, so you only need to modify those CEs
newly connected to the PE in future expansion.
CAUTION: You can only modify CE range to a larger value, but not a less value.
For example, you can change CE range from 10 to 20, but not from 10 to 5. The
For example, you can change CE range from 10 to 20, but not from 10 to 5. The
Table 835 Configuring VPN
Operation
Command
Configure RD for MPLS L2VPN
route-distinguisher
route-distinguisher
Configure VPN-target for MPLS L2VPN
vpn-target vpn-target-ext-community
[ import-extcommunity|
export-extcommunity | both ]
Delete the VPN-target of MPLS L2VPN
undo vpn-target
vpn-target-ext-community [
import-extcommunity |
export-extcommunity | both ]
Configure L2 MTU for MPLS L2VPN
mtu mtu
Table 836 Creating CE
Operation
Command
Create a CE or modify CE range
ce name id id [ range range ] [
default-offset offset ]
Enter the CE
ce name
Delete the CE
undo ce name