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We can confirm this also on our 2.7 Upgrade which broke FRR from starting (although I think its somthing to do with the new FRR package though instead of pfsense core itself)

[2.7.0-RELEASE][root@pfsense]/root: /usr/local/sbin/zebra -d -M snmp
loading module "snmp" failed: Shared object "snmp" not found, required by "zebra" 

Even though we have the modules on the machine

[2.7.0-RELEASE][root@pfsense]/root: pkg info -l frr7 | grep snmp
    /usr/local/lib/frr/modules/bgpd_snmp.so
    /usr/local/lib/frr/modules/ospf6d_snmp.so
    /usr/local/lib/frr/modules/ospfd_snmp.so
    /usr/local/lib/frr/modules/ripd_snmp.so
    /usr/local/lib/frr/modules/zebra_snmp.so
    /usr/local/lib/libfrrsnmp.a
    /usr/local/lib/libfrrsnmp.so
    /usr/local/lib/libfrrsnmp.so.0
    /usr/local/lib/libfrrsnmp.so.0.0.0

For those hitting this error, do you have the NET-SNMP package installed and active?

The AgentX integration is intended for use with that package and wouldn't work without it.

If it works with NET-SNMP installed then FRR should just detect that case and not try to use it when it's not there.

If it doesn't work even when NET-SNMP is installed, then the AgentX integration is broken somehow and should maybe be removed if it can't be repaired.

Jim Pingle wrote in #note-3:

For those hitting this error, do you have the NET-SNMP package installed and active?

The AgentX integration is intended for use with that package and wouldn't work without it.

If it works with NET-SNMP installed then FRR should just detect that case and not try to use it when it's not there.

If it doesn't work even when NET-SNMP is installed, then the AgentX integration is broken somehow and should maybe be removed if it can't be repaired.

For us when we upgraded from 2.60 to 2.7 we did in fact have `net-snmp` packages installed before and after the upgrade (and continued to work fine too for us) while having the above described failure.

We did not try a fresh 2.70 install, so cant not comment on this.

The FRR package is built with SNMP support but it doesn't appear to be loading the module somehow.

The vtysh CLI lists "agentx" as a valid command but trying to enter it in vtysh results in an error saying it is an unknown command. Searching on that error says that the daemons aren't loading the module, however, I tried a few different ways to load the module (e.g. zebra -d -M snmp) but none succeeded. They all produce an error saying the module cannot be found, even when the relevant .so files are in place in /usr/local/lib/frr/modules/.

I see this issue is now assigned, just for reference here are some probably heavily related tickets:

https://github.com/FRRouting/frr/issues/14875
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275252
https://github.com/opnsense/ports/issues/179
https://redmine.pfsense.org/issues/14491#change-68711

All ultimately say "upstream fault" and the FRR guys claim that its user issue with lacking libs :(

I really hope someone will be able to see what has been missing in the FRR package/setup to enable snmp/agentx support

Found a use case for AgentX and ran into the frr start.

Jim - i see the target versions have been deleted. Does that mean this wont be investigated?

Mike Moore wrote in #note-10:

Found a use case for AgentX and ran into the frr start.

Jim - i see the target versions have been deleted. Does that mean this wont be investigated?

It's a package, it doesn't need to be tied to a release.