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The Subnet Mask of the Route Advertised by the Router Is Not Displayed In the Configuration Script After the Network Command Is Executed

Publication Date:  2012-07-27 Views:  65 Downloads:  0
Issue Description
After advertising the VPNv4 route under the IPv4 VPN instance on the NE80E, the customer at a certain office runs the display current-configuration command to check the configuration and finds that the 24-bit mask of the corresponding network segment is not displayed after the network command is executed.
The customer runs the following command:
[quidway-BGP-GPRS_Gn_C]network route-policy rp_BGP_community_out
The configuration script is as follows:
ipv4-family vpn-instance GPRS_Gn_C
preference 170 170 170
network route-policy rp_BGP_community_out 
Alarm Information
Handling Process
In the configuration process, the network segment advertised is, belonging to class C address segment. The subnet mask configured is, whereas the natural mask of class C address segment is also The subnet mask is the same as the natural mask. Therefore, the subnet mask is not displayed in the configuration script. 
Root Cause
1. IP address segments are divided into five types:
A class: Natural mask:
B class: Natural mask:
C class: Natural mask:
D class: Broadcast address segment
E class: Reserved address segment
2. When the NE40E, NE80E, or the NE5000E of Huawei advertises route information, if the subnet mask of the network segment advertised is the same as the natural mask of this network segment, the subnet mask is not displayed in the configuration script.