Sensor 1800s

[SMI3891]

I have sensors that claimed to DNAC and running while on wireless backhaul, but I am not able to ping them or SSH, even I have enabled the SSH. Also when I try to connect them through wired on a vlan has dhcp enabled option 43 still unreachable on dnac.

any suggestion please

[Flavio Miranda]

Hi @SMI3891 

 Make sure you added the option 43 corectly on the DHCP server and most important if the DHCP server does support it

The string should look like this:

5A1N;B2;K4;I<Cisco DNA Center IP Address>;J80

The problem with Option 43 is that sometimes DHCP servers vendors implement it differently and this can cause troubles.

If you are using a Cisco switch or router as DHCP server, you can find an example config on cisco docs like this one

ip dhcp pool vlan30
network 30.30.0.0 255.255.0.0
default-router 30.30.0.1
dns-server 100.100.100.11
option 43 ascii 5A1N;B2;K4;I100.100.100.80;J80

[Leo Laohoo]

What firmware is DNAC on?

What firmware are the 1800s on?

[SMI3891]

@Flaf thank you for the info, I have implemented option 43 on a Microsoft server and I have used the schema used on the deployment guide.

@Leo Laohoo I am using dnac 2.3.3.7 and the 1800S was on 1.3.3.3 and now 2.3.3.3

[SMI3891]

Also, the wireless sensor shows 10% of the claim progress

[Flavio Miranda]

This means then the Sensor contacted  DNAC and is trying to join. I had this problem too and I had to repeat it some times until I got the sensor claimed.