How do I show signal strength eoip tunnel?

It would be easier to do it directly to a device because device labels are processed differently than link labels. Links are context of the device and they are connected to through their SNMP object ID to the device. You can place [oid(“x.x.x.x.x”)] in the appearance of a device and it will appear where it will not on a link label.
Example probe…
The RSSI for a tranzeo 4132 [oid(“1.3.6.1.4.1.24575.1.1.1”)]
The RSSI for a tranzeo 4132 WITH IP [oid(“1.3.6.1.4.1.24575.1.1.1”,“192.168.1.1”)] use this for testing..
OID COMMAND - returns value of given snmp OID. Only first parameter mandatory. First parameter - oid string, second - cache time - default 5 seconds (5.0), third - negative cache time - default 5 minutes (300.0), forth - ip address (overrides context device), fifth - snmp profile (overrides context device)
Lebowski