Update to 2.5.0 broke DHCP relay

viktor_g

@thesurf Please provide more info about your configuration -
interfaces, IP addresses, DHCP Relay configuration

Gertjan

@thesurf A of 2.5.0 there is no more 'circular logging'.
pfSense 2.5.0 uses the more universal clear text line 'syslog' logging. The log files should be readabale with a simple 'cat' command.

Btw : I'm not using 'relayd' myself, and the pfSense in front of me is still on 2.4.5-p1 (update tomorrow), so can't detail more.

A program or service (process, daemon) can use whatever it want as a log file. Its not mandatory to use the system's syslog capabilities.

This file :
/var/log/relayd.log
dates from before the upgrade ?
Note the owner and group of the fiile.

That is, if you wipe it, and then

touch /var/log/relayd.log

A zero byte file will get created.
Adapt the owner / group if needed.

Start relayd.
The file changes - grows in size ?
Binary ? plain text ?

thesurf

Next Update...
if you enable the dhcp relay service like this:

Then click on the disable checkbox and save

and then reenable the service. The destionation services are missing.

thesurf

This post is deleted!

thesurf

@gertjan

Thanks for the reply. Did what you suggest.

[2.5.0-RELEASE][root@fwint3]/var/log: touch relayd.log
[2.5.0-RELEASE][root@fwint3]/var/log: ls -l relayd.log
-rw-r--r--  1 root  wheel  0 Feb 19 10:35 relayd.log

The service was once again configured. No file size change. Then it was started in the services section, one again no file size incread

thesurf

@viktor_g

Hi,

I have a Dell R610 with Intel X520 NIC. On this nic I have about 5 VLANs.

On 3 of this VLAN (as Interface in pfSense) I have activated relayd to forward the dhcp request to my dhcp Servers (Active directory controller).

Local net 192.168.8.0/24

DHCP: 192.168.1.27 and 192.168.1.28

Since this is another office Building. The pfSense on the client Network routes to the network 192.168.1.0/24 via a lwl Kabel.

This setup was up an running with 2.4.5_p1 for about 1 year. After the upgrade the service relayd would not start anymore.

viktor_g

@thesurf said in Update to 2.5.0 broke DHCP relay:

This setup was up an running with 2.4.5_p1 for about 1 year. After the upgrade the service relayd would not start anymore.

relayd or DHCP relay?..

https://docs.netgate.com/pfsense/en/latest/releases/2-5-0.html#security-errata:

Deprecated the built-in relayd Load Balancer #9386

relayd does not function with OpenSSL 1.1.x
The relayd FreeBSD port has been changed to require libressl – There is no apparent sign of work to make it compatible with OpenSSL 1.1.x
The HAProxy package may be used in its place; It is a much more robust and more feature-complete load balancer and reverse proxy

thesurf

@viktor_g

I I thought the relayd was the dhcp relay.
I'm working on the dhcp relay / forwarder.

For loadbalancing I'm using ha proxy on other pfsense.

fwcheck

I can confirm your findings. The DHCP-Relay setup was/is broken on update.

I used

/usr/local/sbin/dhcrelay -id vmx1 -iu vmx0 -a -m replace IP_dhcp-server1 IP_dhcpsever2

as a quick fix. (one WAN (vmx0), one LAN-Interface (vmx1))

I was very delighted to see that within 2.4.5_p1 the DHCP-Handling was much better. I did not have time to look deeply into this problem, so this is a quick fix.

viktor_g

@fwcheck said in Update to 2.5.0 broke DHCP relay:

I can confirm your findings. The DHCP-Relay setup was/is broken on update.

I used

/usr/local/sbin/dhcrelay -id vmx1 -iu vmx0 -a -m replace IP_dhcp-server1 IP_dhcpsever2

as a quick fix. (one WAN (vmx0), one LAN-Interface (vmx1))

I was very delighted to see that within 2.4.5_p1 the DHCP-Handling was much better. I did not have time to look deeply into this problem, so this is a quick fix.

Could you provide vmx0 and vmx1 IP addresses and IP_dhcp-server1, IP_dhcpsever2 to check ?

fwcheck

@viktor_g
Short:
vmx0 is a private IP
vmx1 is a public IP
Both dhcp Servers are upstream (behind vmx0)

Later today i will do a clean update install (2.4.4_p3 -> 2.5.0) and can check that again. I will come back to this.

viktor_g

@fwcheck we need to know IP addresses to test
you can change the network part of address if you don't want to show it

jimp

To diagnose this we are going to need better info. You can redact some things but we need to know:

The interfaces involved, and their subnets
All of the DHCP relay settings used

If you redact anything replace them with appropriate dummy addresses but keep at least enough to uniquely identify them (e.g. 10.0.0.1/24 -> x.x.x.1/24, 10.4.1.2/24->y.y.y.2/24).

Bonus points for getting the process output from 2.4.x and 2.5.x to compare what it's trying to run in each case.

fwcheck

I am not quite sure but i think within 2.4.5_p1 the dhcp was supplying adresses to openvpn-clients via a bridge. I will look into the old configuration ans supply info on monday afternoon.
Redundant carp setup
looks basically like this:
vmx0 192.168.0.3/29
vmx1 1.1.1.1/24 (a public subnet)
dhcp-server 10.2.1.14
dhcp-server 10.2.1.13

thesurf

@jimp

lets try here to give you a quick headsup since it is alread 9pm in germany.

Building setup:

Building a  ---- LWL dark fiber ---- Head office

Some quick drawing from draw.io

Total

The Carp and pfSense cluster didn't play a role here. I disabled carp in testing.

What I have seen on fwint3 that the dhcp request arrive as usal on the clients interface. But nothing is send out to the dhcp server.

There are more vlans that have ther own interface assigned in pfSense and other components, but they can be left out.

The cluster fwint3 and fwint4 have been updated without any problems from 2.4.5p1 to 2.5.0. Routing traffic everything works but not the dhcp forwarding.

I think I do not have logs of 2.4.5p1. And on 2.5.0 the dhcp forward did not start. There is nothing in the dhcp log nor is there something in the syslog. If I disable dhcp forwarding and start dhcp server on the fwint3 I see dhcp logs and leases go out and work like they did when they where forwarded.

Hope that helps. I you need something let me know.

thesurf

@jimp
Hi forgot. All Interface are intel x520 nic. So Interfaces will be ix0 and ix1 on each firewall. On top that is the vlan so ix0.8 and so on. NO Bridge.

johnsdixon

Also occurring on VMware ESXi 6.7 hosted environment with VMXNET3 cards. Single DHCP server target, with relays from six different networks (some VLAN, some 'direct' connect). Appears that all do not pass the DHCP packets to the server (none received in the external server logs), but packets are seen by packet capture on the interfaces concerned on pfSense.
Happy to build a test 2.5.0 environment to provide further info and logs if necessary.

viktor_g

@johnsdixon said in Update to 2.5.0 broke DHCP relay:

Happy to build a test 2.5.0 environment to provide further info and logs if necessary.

very good, we need to know:

DHCP Relay configuration (screenshot or <dhcrelay> part from your config.xml);
Routing table (netstat -rn output);
Interfaces IP addresses (ifconfig output);

thesurf

@viktor_g said in Update to 2.5.0 broke DHCP relay:

@johnsdixon said in Update to 2.5.0 broke DHCP relay:

Happy to build a test 2.5.0 environment to provide further info and logs if necessary.

very good, we need to know:

DHCP Relay configuration (screenshot or <dhcrelay> part from your config.xml);

Routing table (netstat -rn output);

Interfaces IP addresses (ifconfig output);

Hi, network plan I have already posted abouve.

Here are the requeired data:

[2.5.0-RELEASE][root@fwint3.XXXXXXXX.local]/conf: netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            10.10.65.3         UGS    lagg0.65
10.10.55.0/28      link#19            U      lagg0.11
10.10.55.2         link#19            UHS         lo0
10.10.56.0/30      link#8             U          bge1
10.10.56.1         link#8             UHS         lo0
10.10.64.0/28      link#18            U      lagg0.64
10.10.64.4         link#18            UHS         lo0
10.10.64.6         link#18            UHS         lo0
10.10.65.0/28      link#17            U      lagg0.65
10.10.65.4         link#17            UHS         lo0
10.10.65.6         link#17            UHS         lo0
127.0.0.1          link#10            UH          lo0
192.168.8.0/24     link#14            U       lagg0.8
192.168.8.252      link#14            UHS         lo0
192.168.8.254      link#14            UHS         lo0
192.168.11.0/24    link#19            U      lagg0.11
192.168.11.252     link#19            UHS         lo0
192.168.11.254     link#19            UHS         lo0
192.168.24.0/24    link#15            U      lagg0.24
192.168.24.252     link#15            UHS         lo0
192.168.24.254     link#15            UHS         lo0
192.168.71.0/24    link#20            U      lagg0.71
192.168.71.252     link#20            UHS         lo0
192.168.71.254     link#20            UHS         lo0
192.168.109.0/24   link#16            U      lagg0.10
192.168.109.252    link#16            UHS         lo0
192.168.109.254    link#16            UHS         lo0

Internet6:
Destination                       Gateway                       Flags     Netif Expire
::1                               link#10                       UH          lo0
fe80::%bge1/64                    link#8                        U          bge1
fe80::529a:4cff:fe94:ad73%bge1    link#8                        UHS         lo0
fe80::%lo0/64                     link#10                       U           lo0
fe80::1%lo0                       link#10                       UHS         lo0
fe80::%lagg0/64                   link#13                       U         lagg0
fe80::faf2:1eff:fe34:9540%lagg0   link#13                       UHS         lo0
fe80::%lagg0.8/64                 link#14                       U       lagg0.8
fe80::faf2:1eff:fe34:9540%lagg0.8 link#14                       UHS         lo0
fe80::%lagg0.24/64                link#15                       U      lagg0.24
fe80::faf2:1eff:fe34:9540%lagg0.24 link#15                      UHS         lo0
fe80::%lagg0.109/64               link#16                       U      lagg0.10
fe80::faf2:1eff:fe34:9540%lagg0.109 link#16                     UHS         lo0
fe80::%lagg0.65/64                link#17                       U      lagg0.65
fe80::faf2:1eff:fe34:9540%lagg0.65 link#17                      UHS         lo0
fe80::%lagg0.64/64                link#18                       U      lagg0.64
fe80::faf2:1eff:fe34:9540%lagg0.64 link#18                      UHS         lo0
fe80::%lagg0.11/64                link#19                       U      lagg0.11
fe80::faf2:1eff:fe34:9540%lagg0.11 link#19                      UHS         lo0
fe80::%lagg0.71/64                link#20                       U      lagg0.71
fe80::faf2:1eff:fe34:9540%lagg0.71 link#20                      UHS         lo0

[2.5.0-RELEASE][root@fwint3.XXXXXXXXXXX.local]/conf: ifconfig
igb0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether b4:96:91:33:de:40
        media: Ethernet autoselect
        status: no carrier
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
igb1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether b4:96:91:33:de:41
        media: Ethernet autoselect
        status: no carrier
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
igb2: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether b4:96:91:33:de:42
        media: Ethernet autoselect
        status: no carrier
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
igb3: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether b4:96:91:33:de:43
        media: Ethernet autoselect
        status: no carrier
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
ixl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        media: Ethernet autoselect (10Gbase-SR <full-duplex>)
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
ixl1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        hwaddr f8:f2:1e:34:95:41
        media: Ethernet autoselect (10Gbase-SR <full-duplex>)
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
bge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=c019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
        ether 50:9a:4c:94:ad:72
        media: Ethernet autoselect
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
bge1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: sync
        options=c019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE>
        ether 50:9a:4c:94:ad:73
        inet6 fe80::529a:4cff:fe94:ad73%bge1 prefixlen 64 scopeid 0x8
        inet 10.10.56.1 netmask 0xfffffffc broadcast 10.10.56.3
        media: Ethernet autoselect (1000baseT <full-duplex,master>)
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
enc0: flags=41<UP,RUNNING> metric 0 mtu 1536
        groups: enc
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0xa
        inet 127.0.0.1 netmask 0xff000000
        groups: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
pflog0: flags=100<PROMISC> metric 0 mtu 33160
        groups: pflog
pfsync0: flags=41<UP,RUNNING> metric 0 mtu 1500
        pfsync: syncdev: bge1 syncpeer: 10.10.56.2 maxupd: 128 defer: off
        syncok: 1
        groups: pfsync
lagg0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0 prefixlen 64 scopeid 0xd
        laggproto failover lagghash l2,l3,l4
        laggport: ixl0 flags=5<MASTER,ACTIVE>
        laggport: ixl1 flags=0<>
        groups: lagg
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.8: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: LANMaMue
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.8 prefixlen 64 scopeid 0xe
        inet 192.168.8.252 netmask 0xffffff00 broadcast 192.168.8.255
        inet 192.168.8.254 netmask 0xffffff00 broadcast 192.168.8.255 vhid 8
        groups: vlan
        carp: MASTER vhid 8 advbase 5 advskew 1
        vlan: 8 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.24: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: PrintMaMue
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.24 prefixlen 64 scopeid 0xf
        inet 192.168.24.252 netmask 0xffffff00 broadcast 192.168.24.255
        inet 192.168.24.254 netmask 0xffffff00 broadcast 192.168.24.255 vhid 24
        groups: vlan
        carp: MASTER vhid 24 advbase 5 advskew 1
        vlan: 24 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.109: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: VoiceMaMue
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.109 prefixlen 64 scopeid 0x10
        inet 192.168.109.252 netmask 0xffffff00 broadcast 192.168.109.255
        inet 192.168.109.254 netmask 0xffffff00 broadcast 192.168.109.255 vhid 109
        groups: vlan
        carp: MASTER vhid 109 advbase 5 advskew 1
        vlan: 109 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.65: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: CarrierVlanLWL
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.65 prefixlen 64 scopeid 0x11
        inet 10.10.65.4 netmask 0xfffffff0 broadcast 10.10.65.15
        inet 10.10.65.6 netmask 0xfffffff0 broadcast 10.10.65.15 vhid 65
        groups: vlan
        carp: MASTER vhid 65 advbase 5 advskew 1
        vlan: 65 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.64: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: CarrierVLanWlan
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.64 prefixlen 64 scopeid 0x12
        inet 10.10.64.4 netmask 0xfffffff0 broadcast 10.10.64.15
        inet 10.10.64.6 netmask 0xfffffff0 broadcast 10.10.64.15 vhid 64
        groups: vlan
        carp: MASTER vhid 64 advbase 5 advskew 1
        vlan: 64 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.11: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: MgmtMaMue
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.11 prefixlen 64 scopeid 0x13
        inet 192.168.11.252 netmask 0xffffff00 broadcast 192.168.11.255
        inet 192.168.11.254 netmask 0xffffff00 broadcast 192.168.11.255 vhid 11
        inet 10.10.55.2 netmask 0xfffffff0 broadcast 10.10.55.15
        groups: vlan
        carp: MASTER vhid 11 advbase 1 advskew 0
        vlan: 11 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0.71: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: ErfasserLAN
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether f8:f2:1e:34:95:40
        inet6 fe80::faf2:1eff:fe34:9540%lagg0.71 prefixlen 64 scopeid 0x14
        inet 192.168.71.252 netmask 0xffffff00 broadcast 192.168.71.255
        inet 192.168.71.254 netmask 0xffffff00 broadcast 192.168.71.255 vhid 71
        groups: vlan
        carp: MASTER vhid 71 advbase 1 advskew 0
        vlan: 71 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

I have deactivated dhcp server and enabled dhcp forwarding again with the values as there where and saved it:

but unter /conf/config.xml I cat NOT find anything about dhcp forwarding. Even the gui said it was saved. (Did I look on the wrong place?)

This is out of the 2.4.4p1 config

<dhcrelay>
	<enable></enable>
	<interface>opt1,opt3,opt7,opt8</interface>
	<agentoption></agentoption>
	<server>192.168.1.28,192.168.1.27</server>
</dhcrelay>

johnsdixon

@viktor_g
Also from my environment.. (first set under 2.4.5_1, second under 2.5.0).

<dhcrelay>
        <enable></enable>
        <interface>lan</interface>
        <agentoption></agentoption>
        <server>192.168.99.1</server>
</dhcrelay>

Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            100.64.44.1        UGS        vmx0
100.64.44.0/24     link#1             U          vmx0
100.64.44.3        link#1             UHS         lo0
127.0.0.1          link#3             UH          lo0
192.168.0.0/16     100.64.44.1        UGS        vmx0
192.168.192.0/24   link#2             U          vmx1
192.168.192.1      link#2             UHS         lo0

Internet6:
Destination                       Gateway                       Flags     Netif Expire
::1                               link#3                        UH          lo0
fe80::%vmx0/64                    link#1                        U          vmx0
fe80::20c:29ff:fe24:ebd7%vmx0     link#1                        UHS         lo0
fe80::%vmx1/64                    link#2                        U          vmx1
fe80::20c:29ff:fe24:ebe1%vmx1     link#2                        UHS         lo0
fe80::%lo0/64                     link#3                        U           lo0
fe80::1%lo0                       link#3                        UHS         lo0

vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=60009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	ether 00:0c:29:24:eb:d7
	hwaddr 00:0c:29:24:eb:d7
	inet6 fe80::20c:29ff:fe24:ebd7%vmx0 prefixlen 64 scopeid 0x1
	inet 100.64.44.3 netmask 0xffffff00 broadcast 100.64.44.255
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect
	status: active
vmx1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=60009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	ether 00:0c:29:24:eb:e1
	hwaddr 00:0c:29:24:eb:e1
	inet6 fe80::20c:29ff:fe24:ebe1%vmx1 prefixlen 64 scopeid 0x2
	inet 192.168.192.1 netmask 0xffffff00 broadcast 192.168.192.255
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect
	status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
	inet 127.0.0.1 netmask 0xff000000
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: lo
enc0: flags=0<> metric 0 mtu 1536
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: enc
pfsync0: flags=0<> metric 0 mtu 1500
	groups: pfsync
pflog0: flags=100<PROMISC> metric 0 mtu 33160
	groups: pflog

And from 2.5.0, immediately after upgrading.

-<dhcrelay>
<enable/>
<interface>lan</interface>
<agentoption/>
<server>192.168.99.1</server>
</dhcrelay>

Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            100.64.44.1        UGS        vmx0
100.64.44.0/24     link#1             U          vmx0
100.64.44.3        link#1             UHS         lo0
127.0.0.1          link#4             UH          lo0
192.168.0.0/16     100.64.44.1        UGS        vmx0
192.168.192.0/24   link#2             U          vmx1
192.168.192.1      link#2             UHS         lo0

Internet6:
Destination                       Gateway                       Flags     Netif Expire
::1                               link#4                        UH          lo0
fe80::%vmx0/64                    link#1                        U          vmx0
fe80::20c:29ff:fe24:ebd7%vmx0     link#1                        UHS         lo0
fe80::%vmx1/64                    link#2                        U          vmx1
fe80::20c:29ff:fe24:ebe1%vmx1     link#2                        UHS         lo0
fe80::%lo0/64                     link#4                        U           lo0
fe80::1%lo0                       link#4                        UHS         lo0

vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	description: WAN
	options=e000bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	ether 00:0c:29:24:eb:d7
	inet6 fe80::20c:29ff:fe24:ebd7%vmx0 prefixlen 64 scopeid 0x1
	inet 100.64.44.3 netmask 0xffffff00 broadcast 100.64.44.255
	media: Ethernet autoselect
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
vmx1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	description: LAN
	options=e000bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	ether 00:0c:29:24:eb:e1
	inet6 fe80::20c:29ff:fe24:ebe1%vmx1 prefixlen 64 scopeid 0x2
	inet 192.168.192.1 netmask 0xffffff00 broadcast 192.168.192.255
	media: Ethernet autoselect
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
enc0: flags=0<> metric 0 mtu 1536
	groups: enc
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
	inet 127.0.0.1 netmask 0xff000000
	groups: lo
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
pflog0: flags=100<PROMISC> metric 0 mtu 33160
	groups: pflog
pfsync0: flags=0<> metric 0 mtu 1500
	groups: pfsync