You are right, ping is not happy about 192.168.1.0. So I switched to 192.168.1.1 and 192.168.1.2.
Ping works in both directions. But ospfd still list an empty table for "show ip ospf neighbor".
All commands again for nodes 1 and 2:
$ sudo netns add ns-1
$ sudo netns add ns-2
$ sudo ip netns exec ns-1 ip a a 192.168.1.1/24 dev uplink
$ sudo ip netns exec ns-2 ip a a 192.168.1.2/24 dev uplink
$ sudo ip netns exec ns-1 ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
4: uplink@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 12:bc:58:4f:6c:c5 brd ff:ff:ff:ff:ff:ff link-netns switch
inet 192.168.1.1/24 scope global uplink
valid_lft forever preferred_lft forever
inet6 fe80::10bc:58ff:fe4f:6cc5/64 scope link
valid_lft forever preferred_lft forever
$ sudo ip netns exec ns-2 ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
7: uplink@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 9e:84:c2:86:90:d8 brd ff:ff:ff:ff:ff:ff link-netns switch
inet 192.168.1.2/24 scope global uplink
valid_lft forever preferred_lft forever
inet6 fe80::9c84:c2ff:fe86:90d8/64 scope link
valid_lft forever preferred_lft forever
$ sudo ip netns exec ns-2 ip r
192.168.1.0/24 dev uplink proto kernel scope link src 192.168.1.2
$ sudo ip netns exec ns-1 ip r
192.168.1.0/24 dev uplink proto kernel scope link src 192.168.1.1
$ sudo ip netns exec ns-2 ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.110 ms
^C
--- 192.168.1.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.110/0.110/0.110/0.000 ms
$ sudo ip netns exec ns-1 ping 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=0.054 ms
64 bytes from 192.168.1.2: icmp_seq=2 ttl=64 time=0.063 ms
^C
--- 192.168.1.2 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1022ms
rtt min/avg/max/mdev = 0.054/0.058/0.063/0.004 ms
$ cat ospf1.conf
router ospf
ospf router-id 192.168.1.1
network 192.168.1.0/24 area 1
$ cat ospf2.conf
router ospf
ospf router-id 192.168.1.2
network 192.168.1.0/24 area 1
$ sudo ip netns exec ns-1 ospfd --terminal -f ./ospf1.conf -i /run/frr/ospfd1.pid
$ sudo ip netns exec ns-2 ospfd --terminal -f ./ospf2.conf -i /run/frr/ospfd2.pid
On 8/21/20 10:33 PM, Don Slice wrote:
> Can you ping between the pertinent interfaces? In other words, did you
> verify reachability between 192.168.1.1 and 192.168.1.0? BTW, I
> would avoid using the .0 address on a /24. Historically, this has
> represented the subnet and not one of the addresses on the subnet. There
> are circumstances it makes sense (/31 addressing for example) but is
> normally not done, at least as far as I know.
>
> On Fri, Aug 21, 2020 at 3:08 PM Moritz Warning <moritzwarning@web.de> wrote:
>
>> Hi,
>>
>> I am a newbie with frr/ospf. My aim is to run two ospfd instances in a
>> Linux network namesspace each and let them talk to each other via a virtual
>> link (interface called uplink).
>>
>> My test setup is attached. But I do not see any traffic. This is probably
>> some basic configuration error. I did have a look at the documentation, but
>> it did not seem to cover such simple setups.
>> A few pointer in the right direction would be helpful.
>>
>> thanks,
>> mwarning
>>
>>
>> $ ip netns add ns-0
>> $ ip netns add ns-1
>>
>> # Node 0:
>>
>> $ sudo ip netns exec ns-0 ip a
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
>> default qlen 1000
>> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>> inet 127.0.0.1/8 scope host lo
>> valid_lft forever preferred_lft forever
>> inet6 ::1/128 scope host
>> valid_lft forever preferred_lft forever
>> 4: uplink@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
>> state UP group default qlen 1000
>> link/ether ce:e6:b3:5d:d3:70 brd ff:ff:ff:ff:ff:ff link-netns switch
>> inet 192.168.1.0/24 scope global uplink
>> valid_lft forever preferred_lft forever
>> inet6 fe80::cce6:b3ff:fe5d:d370/64 scope link
>> valid_lft forever preferred_lft forever
>>
>> $ cat ospf0.conf
>> router ospf
>> ospf router-id 192.168.1.0
>> network 192.168.1.0/24 area 1
>>
>> $ sudo ip netns exec ns-0 ospfd --terminal -f ./ospf0.conf -i
>> /run/frr/ospfd0.pid
>>
>>
>> # Node 1:
>>
>> $ sudo ip netns exec ns-1 ip a
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
>> default qlen 1000
>> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>> inet 127.0.0.1/8 scope host lo
>> valid_lft forever preferred_lft forever
>> inet6 ::1/128 scope host
>> valid_lft forever preferred_lft forever
>> 7: uplink@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
>> state UP group default qlen 1000
>> link/ether 12:45:ca:46:19:52 brd ff:ff:ff:ff:ff:ff link-netns switch
>> inet 192.168.1.1/24 scope global uplink
>> valid_lft forever preferred_lft forever
>> inet6 fe80::1045:caff:fe46:1952/64 scope link
>> valid_lft forever preferred_lft forever
>>
>> $ cat ospf1.conf
>> router ospf
>> ospf router-id 192.168.1.1
>> network 192.168.1.0/24 area
>>
>> $ sudo ip netns exec ns-1 ospfd --terminal -f ./ospf1.conf -i
>> /run/frr/ospfd1.pid
>>
>> _______________________________________________
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>> frog@lists.frrouting.org
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>>
>
>