FRRouting doesn't start after enabling SNMP AgentX

[debdolph]

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Describe the bug
A clear and concise description of what the bug is, including last known working version (if any).

Tip: to validate your setup was working with the previous version, use opnsense-revert (https://docs.opnsense.org/manual/opnsense_tools.html#opnsense-revert)

To Reproduce
Steps to reproduce the behavior:

1. Install 'os-net-snmp' package
2. Go to 'Services/Net-SNMP'
3. Enable 'Add AgentX Support' and save
4. Go to 'Routing/General'
5. Enable 'SNMP AgentX Support' and save
6. It will not start again, Logs will show the errors below

Expected behavior
FRR should start and its information exposed over SNMP.

Relevant log files

[root@firewall01 /usr/local/etc/frr]# service frr start
Checking zebra.conf
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 100663303] if_ioctl(SIOCGIFMEDIA) failed: Inappropriate ioctl for device
2022/10/20 01:56:39 ZEBRA: [EC 4043309111] Disabling MPLS support (no kernel support)
2022/10/20 01:56:39 ZEBRA: [EC 100663304] ERROR: No such command on config line 12: agentx
OK
Starting zebra.
loading module "snmp" failed: Shared object "snmp" not found, required by "zebra"
/usr/local/etc/rc.d/frr: WARNING: failed to start zebra
Checking bgpd.conf
2022/10/20 01:56:39 BGP: [EC 33554499] sendmsg_nexthop: zclient_send_message() failed
2022/10/20 01:56:39 BGP: [EC 33554499] sendmsg_nexthop: zclient_send_message() failed
2022/10/20 01:56:39 BGP: [EC 33554499] sendmsg_nexthop: zclient_send_message() failed
2022/10/20 01:56:39 BGP: [EC 33554499] sendmsg_nexthop: zclient_send_message() failed
OK
Starting bgpd.
loading module "snmp" failed: Shared object "snmp" not found, required by "bgpd"
/usr/local/etc/rc.d/frr: WARNING: failed to start bgpd

Additional context
For some more information, see opnsense/plugins#3166.

I also copied the log files from there…

Environment
Software version used and hardware type if relevant.
e.g.:

opnSense 23.7.4 amd64 / os-frr 1.36 / os-net-snmp 1.5_2

[fichtner]

Since you reported on 23.7.4… same for 23.7.5?

[debdolph]

Since you reported on 23.7.4… same for 23.7.5?

I suppose so, yes. I am currently unable to test and will test this tomorrow.

[fichtner]

I'm not so sure because:

opnsense/tools@a5415d46139
2d2e0b1c4c

I saw your report earlier but I started working on it after not having found the original report so I could not follow up that things have changed for 23.7.5.

[debdolph]

root@gw:~ # /usr/local/etc/rc.d/frr start
Checking zebra.conf
2023/10/09 11:42:25 ZEBRA: [NNACN-54BDA][EC 4043309110] Disabling MPLS support (no kernel support)
2023/10/09 11:42:25 ZEBRA: [SHWNK-NWT5S][EC 100663304] No such command on config line 12: agentx
OK
Starting zebra.
frr_init: loader error: dlopen(/usr/local/lib/frr/modules/zebra_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 "zebra"
/usr/local/etc/rc.d/frr: WARNING: failed to start zebra
Checking bgpd.conf
OK
Starting bgpd.
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"
/usr/local/etc/rc.d/frr: WARNING: failed to start bgpd

[fichtner]

Yeah ok this is still broken in FreeBSD ports then. I'll try to fix it in time for 23.7.6 this week.

[fichtner]

Just to double check what is said for:

# pkg info frr8 | grep SNMP

[debdolph]

root@gw:~ # pkg info frr8 | grep SNMP
	SNMP           : on

[debdolph]

Still broken in 23.7.6…

[fichtner]

I know 😉

[fichtner]

Tested 334eb5c2fbff today but the relevant build bits were already in place. Same result: it builds, it's broken on start. I can't spend more community time on this on the premise that nobody who can fix this uses it (apparently) or nobody really uses it at all. I am not a fan in general when it comes to adding activex support anyway. Might be confirmation bias here, but could also be a very fringe use case. Moving this to ports marking upstream.