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How to configure DHCP option43 on eNSP?

Publication Date:  2017-10-19 Views:  1125 Downloads:  0
Issue Description

I used AC as a DHCP server for Head Quarter and also for a Remote Branch as in the topology below.

I observed that for remote branch, CAPWAP tunnel is not UP. How can we solve this?

Handling Process

 1.    I have configured the source for CAPWAP tunnel  as

2.    I have captured packets and I noticed that AP2 sends A CAPWAP Control-Discovery Request with destination IP, instead of the correct IP

Root Cause


When we configure option 43, we need to use the IP of AC in the reverse order, starting with the last octet of the real IP address:

After configuring option 43  using IP, CAPWAP tunnel for remote Branch is UP.