Undefined symbol "netsnmp_enable_subagent"

[zappiehost]

---

Describe the bug

• Did you check if this is a duplicate issue?
• Did you test it on the latest FRRouting/frr master branch?

To Reproduce

1. Compile the latest FRR from git (9.0.1) in FreeBSD
2. Follow the instructions to compile latest FRR (9.0.1) from here: https://docs.frrouting.org/projects/dev-guide/en/latest/building-frr-for-freebsd14.html
3. make sure to add the --with-snmp=agentx into your ./configure
4. gmake && gmake install
5. Confirm FRR was build with snmp by running bgpd -v and looking for the --enable-snmp
6. execute bgpd -M snmp to replicate the fatal error

frr_init: loader error: dlopen(/usr/local/lib/frr/modules/bgpd_snmp.so): /usr/local/lib/libfrrsnmp.so.0: Undefined symbol "netsnmp_enable_subagent"
frr_init: loader error: dlopen(/usr/local/lib/frr/modules/snmp.so): Cannot open "/usr/local/lib/frr/modules/snmp.so"
frr_init: loader error: dlopen(snmp): Shared object "snmp" not found, required by "bgpd"

Expected behavior

I expect that FRR will start up without lib and .so files missing.

Screenshots

Versions

• OS Version: FreeBSD14

• FRR Version: 9.0.1 (master branch from git)

Additional context
This has been an issue in OpenSense and PfSense and also FreeBSD ports when trying to enable SNMP with frr

[donaldsharp]

the Equivalent package on debian is libsnmp-dev that you are missing. I would suggest you figure out what the equivalent package is on freebsd and install it as well. I do not have a equivalent freebsd-14 vm at this point in time to do any type of experimenting to help you out

[zappiehost]

Thanks for the reply @donaldsharp

I have (and always did) have the net-snmp package installed on the FreeBSD system prior to compiling FRR with snmp support.

If I tried to compile FRRwithout net-snmp (which has libsnmp) the FRR compiler would complain on the ./configure dependancy check.

Is there anything I can help test to get this working as both our routers running PfSense and OpenSense have these issues with FRR (both being on FreeBSD)

Thanks!

[rwgbsd]

I have replicated this locally. It looks as if we need an additional .so pulled in to resolve the symbol "netsnmp_enable_subagent". It is starting to look like they split out the agentx stuff into a seperate lib as this support is optional. This bug may affect other operating systems, which I shall also investigate.

[zappiehost]

I have replicated this locally. It looks as if we need an additional .so pulled in to resolve the symbol "netsnmp_enable_subagent". It is starting to look like they split out the agentx stuff into a seperate lib as this support is optional. This bug may affect other operating systems, which I shall also investigate.

How did you searching go @rwgbsd Did you find what package might be missing in order to get FRR with SNMP to work?

[rwgbsd]

How did you searching go @rwgbsd Did you find what package might be missing in order to get FRR with SNMP to work?

This is not a matter of a missing pacakge, net-snmp infact includes a library file with the netsnmp_enable_subagent" defined, but the frr compile code is not pulling in that library for some reason. Either the net-snmp package has changed or this has been broken for a very long time.

I did not have time this past week to get back to this, hopefully I can atleast find out how wide spread the breakage is soon. Is anyone out there successfully running frr with net-snmp on ANY platform? Debian? Ubuntu?

[zappiehost]

That makes sense @rwgbsd

Did you by chance manage to find what (and where) is missing for the libs and might need to be pulled differently in to make SNMP with FRR?

I can replicate this issue on Debain 12 with latest src from git (followed this guide: https://docs.frrouting.org/projects/dev-guide/en/latest/building-frr-for-debian12.html#install-required-packages)

root@debain12:/tmp/frr# ./bgpd/bgpd -v
bgpd version 9.2-dev
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
	'--localstatedir=/var/opt/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--enable-multipath=64' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' '--enable-fpm' '--with-snmp=agentx'

root@debain12:/tmp/frr# ./bgpd/bgpd -M snmp
frr_init: loader error: dlopen(/usr/local/lib/frr/modules/bgpd_snmp.so): /usr/local/lib/frr/modules/bgpd_snmp.so: cannot open shared object file: No such file or directory
frr_init: loader error: dlopen(/usr/local/lib/frr/modules/snmp.so): /usr/local/lib/frr/modules/snmp.so: cannot open shared object file: No such file or directory
frr_init: loader error: dlopen(snmp): snmp: cannot open shared object file: No such file or directory

root@debain12:/tmp/frr# ls -lsa  /usr/local/lib/frr/modules/
total 3376
   4 drwxr-xr-x 2 root root    4096 Jan 23 22:41 .
   4 drwxr-xr-x 3 root root    4096 Jan 23 22:41 ..
   4 -rwxr-xr-x 1 root root     992 Jan 23 22:41 dplane_fpm_nl.la
 192 -rwxr-xr-x 1 root root  195344 Jan 23 22:41 dplane_fpm_nl.so
   4 -rwxr-xr-x 1 root root     974 Jan 23 22:41 pathd_pcep.la
2568 -rwxr-xr-x 1 root root 2626064 Jan 23 22:41 pathd_pcep.so
   4 -rwxr-xr-x 1 root root    1022 Jan 23 22:41 zebra_cumulus_mlag.la
  60 -rwxr-xr-x 1 root root   58072 Jan 23 22:41 zebra_cumulus_mlag.so
   4 -rwxr-xr-x 1 root root    1040 Jan 23 22:41 zebra_fpm.la
 292 -rwxr-xr-x 1 root root  295424 Jan 23 22:41 zebra_fpm.so
   4 -rwxr-xr-x 1 root root     974 Jan 23 22:41 zebra_irdp.la
 236 -rwxr-xr-x 1 root root  237864 Jan 23 22:41 zebra_irdp.so