ospf: getting route defined in Linux. Possible simple set up problem

[colinpaicemq]

I am trying to use ospf to connect some systems together.
On a Ubuntu Linux, I can see the OSPF definition, but there is no route defined to Linux.
For example

show ip route

K>* 0.0.0.0/0 [0/600] via 192.168.1.254, wlp4s0, 01:38:03
O>* 10.1.0.0/24 [110/300] is directly connected, enp0s31f6, weight 1, 01:03:53
L>* 10.1.0.2/32 is directly connected, enp0s31f6, 01:03:53
O 10.1.1.0/24 [110/310] via 10.1.0.3, enp0s31f6 inactive, weight 1, 01:02:58
K>* 10.1.1.0/24 [0/0] via 10.1.0.3, enp0s31f6, 01:06:59
O 10.1.3.0/24 [110/310] via 10.1.0.3, enp0s31f6 inactive, weight 1, 01:02:58
K>* 169.254.0.0/16 [0/1000] is directly connected, wlp4s0, 01:38:03
O 192.168.1.0/24 [110/20] via 10.1.0.3, enp0s31f6 inactive, weight 1, 01:02:57
L>* 192.168.1.222/32 is directly connected, wlp4s0, 01:38:03

there is an OSPF route for 10.1.3.0/24, but there is no matching route in Linux. If I ping 10.1.3.1 it goes via the default route (wireless).

This is a pretty basic problem, so I'm guessing that this is a set up problem.

I have sysctl set (as per doc)

net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding=1

# Routing
net.ipv6.route.max_size=131072
net.ipv4.conf.all.ignore_routes_with_linkdown=1
net.ipv6.conf.all.ignore_routes_with_linkdown=1

# Best Settings for Peering w/ BGP Unnumbered
#    and OSPF Neighbors
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.lo.rp_filter = 0
net.ipv4.conf.all.forwarding = 1
net.ipv4.conf.default.forwarding = 1
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.default.arp_notify = 1
net.ipv4.conf.default.arp_ignore=1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.all.arp_notify = 1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.icmp_errors_use_inbound_ifaddr=1

and a frr.conf file at my local end of

frr version 10.0
frr defaults traditional
hostname colinpaice
log file /var/log/frr/frr.log
log timestamp precision 4
!no ip forwarding
hostname laptop
service integrated-vtysh-config
debug....

interface enp0s31f6
 description colins ospf first
 ip ospf area 0.0.0.0
 ip ospf cost 300
exit

router ospf
 ospf router-id 1.2.3.4

and a config at the remote end of

frr version 10.0
frr defaults traditional
hostname colin-ThinkCentre-M920s
log file /var/log/frr/frr.log
log timestamp precision 4
no ipv6 forwarding
hostname Server
service integrated-vtysh-config
!
interface eno1
 description server ospzz
 ip ospf area 0.0.0.0
 ip ospf network broadcast
!  ip ospf instance-id 1
! ip address 10.4.0.3/24
! ip address 10.5.0.3/24
 ipv6 ospf6 area 0.0.0.0
 ipv6 ospf6 instance-id 1

interface tap2
 ip ospf area 0
!
router ospf
 ospf router-id 1.2.3.3

grepping for the IP address in the trace at my local end I get

2024/05/14 09:56:55.2054 ZEBRA: [HT241-2F7BY] zread_route_del: p=(0:254)10.1.3.0/24, msg flags=0x0, flags=0x0
2024/05/14 09:58:16.7660 ZEBRA: [HT241-2F7BY] zread_route_add: p=(0:0)10.1.3.0/24, msg flags=0x5, flags=0x0
2024/05/14 09:58:16.7761 ZEBRA: [TQKA8-0276P] Not Notifying Owner: ospf about prefix 10.1.3.0/24(254) 0 vrf: 0

---

Is there something else I need to set up?

Colin

[colinpaicemq]

It works with frr 8.1-1ubuntu1.9