DHCP relay does not send DHCP DISCOVER to the DHCP Server in the IPoE server if the route is received by dynamic protocol.
Network MAP:
DHCP Server --- Router1 ----- IPoE Server ---- IPoE Client.
IPoE Server receives the route to the DHCP Server via OSPF.
After boot, after the OSPF adjustment is finished, and the IPoE server receives the route to the DHCP Server by OSPF from Router1, the IPoE client sends DHCP Discover.
However, the IPoE Server does not send it to the DHCP Server via Router1.
Logs:
```
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: eth4.525:: recv [DHCPv4 Discover xid=6ab0dad9 chaddr=00:50:79:66:68:02 <Message-Type Discover> <Host-Name PC2> <Client-ID 01005079666802>]
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: ipoe0:: create interface ipoe0 parent eth4.525
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: ipoe0:: (null): authentication succeeded
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: ipoe0:: no free IPv4 address
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: ipoe0:: terminate
Jan 13 17:02:21 HQ-TEST-NODE accel-ipoe[3149]: ipoe0:: ipoe: session finished
```
If we add a static route to the DHCP Server or restart accel-ppp daemon after the route appears - everything works good.
DHCP Server: 10.61.105.19
IPoE interface IP: 10.0.0.1
IPoE Configuration:
set service ipoe-server authentication mode 'noauth'
set service ipoe-server client-ip-pool test range '10.1.0.0/24'
set service ipoe-server gateway-address '10.0.0.1/24'
set service ipoe-server interface eth4.525 external-dhcp dhcp-relay '10.61.105.19'
set service ipoe-server interface eth4.525 external-dhcp giaddr '10.0.0.1'