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Knowledge Base

Between NE40Es public ip users can't ping together

Publication Date:  2017-08-30  |   Views:  253  |   Downloads:  0  |   Author:  SU1002941557  |   Document ID:  EKB1000843591


Issue Description

Device - NE40X-8

Version - V800R009C00

Public ip changed

Issue description : Between NE40Es public ip users can't ping together

As below scenario , we tried to reach the ip address (public ip address) from but we cant able to ping ip address configured on 1NE40 and natted with ip address configured on 2NE40 and natted with

Alarm Information

No alarm notification

Handling Process

We trace the route from 1NE40 user ( -  to 2NE40 user ( -


Tracing route to []

over a maximum of 30 hops:

  1    1 ms    <1 ms    <1 ms

  2    1 ms     1 ms     1 ms []

  3    10 ms     3 ms     1 ms []

  4     *        *        *     Request timed out.

  5     *        *        *     Request timed out.

Root Cause

Analyze the configuration, we found that configure NAT for the two PCs
1NE40: nat server global inside
2NE40: nat server global inside
And also configure NAT for public ip on 1NE40, so there will be in loop on 1NE40 when traffic is from to
1NE40: nat server global inside



Undo the NAT " nat server global inside " on 1NE40, then the problem was solved