2024-12-24 0

Remote Login to the ONU Connected to the OLT Fails Because the OLT Is Configured with the IP Address of 192.168.1.1

Today, I will share one case about the Remote Login to the ONU Connected to the OLT Fails Because the OLT Is Configured with the IP Address of 192.168.1.1 below.

Product Model

MA5800

Problem Description

When the telnet command is run on the OLT in the diagnose mode to log in to the ONU, the login fails.
Logins to ONUs connected to different boards fail.

Problem Analysis

  1. Check whether remote ONU login is disabled on the upper layer device. It is found that remote ONU login is not disabled.
  2. Run the display interface command on the ONU. It is found that the ONU is configured with the Layer 3 interface IP address (192.168.1.1/24) of VLAN 1000. This IP address conflicts with the default management IP address of the ONUs connected to the ONU.

 

huawei(config)#display interface
vlanif { <cr>|<44,416,1000,3001,3999> }:
 Command: display interface vlanif
……  //Irrelevant output is omitted.
vlanif1000 current state : UP
Line protocol current state : UP
Description : HUAWEI, SmartAX Series, vlanif1000
Interface
The Maximum Transmit Unit is 1500 bytes
Forward plane MTU: -
Internet Address is 192.168.1.1/24
IP Sending Frames' Format is PKTFMT_ETHNT_2,
Hardware address is 00e0-XXXX-XXXX
VLAN Encap-mode : single-tag
……  //Irrelevant output is omitted.

3. Run the undo interface vlanif command to delete the conflicting IP address. This fault is rectified.

Root Cause

An IP address conflict occurs.

Solution Description

Delete the conflicting IP address.

Suggestion

When you configure a temporary management channel for the ONU, avoid using the default management IP address of any interconnecting device or any network service IP address. If such an IP address is configured, delete it immediately after you use it.

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