Setting The Diffserv Mode Supported By The Mpls L3Vpn - Huawei Quidway S9300 series Configuration Manual

Quidway S9300 Terabit Routing Switch
Configuration Guide - MPLS
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On an L2VPN, the MPLS label is in the outer encapsulation layer of the packet. Therefore, the
802.1p field of the VLAN packets needs to be mapped to the EXP field.
Pre-configuration Tasks
Before configuring the DiffServ mode for the MPLS VPNs, complete the following task:
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Data Preparation
None.

2.14.2 Setting the DiffServ Mode Supported by the MPLS L3VPN

Context
You need to set the DiffServ mode supported by the MPLS L3VPN according to the actual
situation of the network.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ip vpn-instance vpn-instance-name
The VPN instance view is displayed.
Step 3 Run:
diffserv-mode { pipe { mpls-exp mpls-exp | domain ds-name } |
exp mpls-exp ] domain ds-name } | uniform [ domain ds-name ] }
The DiffServ mode supported by the MPLS L3VPN is set.
Issue 04 (2011-12-26)
Short pipe: The EXP field added to the MPLS label of the packets by the ingress PE is
defined by the user. If the EXP value is changed on the MPLS network, the new EXP value
is valid only on the MPLS network. The egress PE selects the PHB according to the DSCP
value. When the packet leaves the MPLS network, the DSPC value becomes effective again.
In the uniform model, the precedences of packets on the IP network and the MPLS network
are uniformly defined, that is, the precedence of the packets on the two networks are
globally valid. At the ingress PE, each packet is assigned a label and the lower 3 bits in the
DSCP field are mapped to the EXP field. If the EXP value is changed on the MPLS network,
the change affects the PHB used when the packet leaves the MPLS network. At the egress,
the EXP field of the packet is mapped to the DSCP field.
Setting the mapping of the precedence in the MPLS tunnel label (for details, see
Setting the Mapping of the Precedence in the MPLS Tunnel
NOTE
On F-series boards, when the DiffServ mode is set to short-pipe, a maximum of four domains (with domain
IDs 0 to 3) can be configured. If more than four domains are configured, the MPLS short-pipe mode does
not take effect after the device restarts. You can query the domain ID by using the display diffserv
domain.
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2 MPLS LDP Configuration
2.13
Label)
short-pipe { [ mpls-
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