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Knowledge Base

Users Did not Receive the Addresses After the NE40E Allocated the Remote IP Address Pool for VPN Users

Publication Date:  2019-07-18  |   Views:  201  |   Downloads:  0  |   Author:  SU1001891224  |   Document ID:  EKB0000367448


Issue Description

Networking: PC---MA5200G (PE)---NE40E (PE)
The NE40E served as the DHCP server, and the MA5200G served as the DHCP relay.
The NE40E allocated the remote IP address pool for VPN users. Users did not receive the addresses, and the timeout prompt was displayed on the terminal.
Tracing the packet, the engineer found that the MA5200G sent the discovery packet to the server successfully, but the DHCP server of the NE40E did not return any response.
--[2008/7/10 10:23:17-][DHCPR][000f-1fab-9f5e]: Send discovery packet to server successfully
The discovery packet was successfully forwarded to the server.
--[2008/7/10 10:23:42-][DHCPR][000f-1fab-9f5e]:Timer out(DHCPR_DIS_WAIT_SERVER_OFFER_TIMER) Waiting for the offer packet times out.
The entry is created, and the offer packet is sent out.
<HH_CXJ_NE40E-8>disp dhcp server ip-in-use pool test
IP address Hardware address Lease expiration Type 000f-1fab-9f5e Jul 10 2008 11:20:44 AM Auto:OFFERED
DhcpServer: Send DHCPOFFER to MAC=> 000F-1FAB-9F5E Offer IP=> through

Alarm Information


Handling Process

Checking the configuration, the engineer found no problem, and the ip-in-use entry was created on the NE40E.
After verification, the current version did not support the DHCP server bound with VPN instances.
Although the entry was created, the lower layer did not send the offer packet to the 5200G.
Current version:
[HH_CXJ_NE40E-8]disp ver
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.30 (NE40E&80E V300R002C02B21B)
Upgrade the current version to V300R002C06B511, which supports the DHCP server bound with VPN instances. This version is not released at present. 

Root Cause

1. Configuration
2. Specification