Access Control Lost Contact with Switch

[JohanHendrikx]

When I do an enforce on the EAC engine this error appears.

Full Loss of Contact to Switch detected: ,IP-Address> due to: Unable to make SNMP contact

Is this normal behaviour?

Can this be solved?

[StephanH]

Hello John,

please check the XMC log file /usr/local/Extreme_Networks/NetSight/appdata/logs/server.log.

Especially if there are duplicate SNMP engine IDs.

[M_Nees]

Hi,

i had the same issues and open a GTAC case.

GTAC give me the advice to disable “Router Discovery” related to NAC Engine - MAC-to-IP-Resolution Settings.

BR

[Miguel-Angel_RO]

Johan,

Just to be sure, could you check the snmpwalk from the NAC servers?

Mig

[JohanHendrikx]

I checked with snmpv3 the connection to switch. that is OK.

Versions:

XMC is 8.4.4.26

EAC is 8.4.1.24

[StephanH]

Hello Johan,

first you can check if SNMP is fine with an SNMP walk from the XMC-CLI:

snmpwalk -v3 -l authPriv -u <username> -a SHA -A <authpw> -x DES -X <privpw> <switchip>

You have to fill in the following values according the SNMP profile from XMC

<username>

<authpw>

<privpw>

<switchip>

If you are not using SHA/DES please change that accordingly!

In addition, I would like to know which XMC version you are using and if the problem occurs since an update?