[FROG] OSPF, FreeBSD and aliases

[Donald Sharp]

Can we also see `vtysh -c "show ip route connected"` for Quagga and FRR?

On Sat, Jul 17, 2021 at 7:00 PM Eugene Grosbein <eugen at grosbein.net> wrote:

> Hi!
>
> I hope this is right list to ask. Please correct me if not.
>
> I'm trying to move from quagga to frr 7.5.1. I have existing working setup
> with OSPF
> and FreeBSD servers that have some aliases on its OSPF-enabled interfaces.
> In FreeBSD, if one needs several IP addresses in same IP subnet on one
> interfaces (for CARP etc.)
> then one assigns one of IPs with "real" subnet mask and others with /32
> mask:
>
> igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         inet 192.168.49.3 netmask 0xffffff00 broadcast 192.168.49.255
>         inet 192.168.49.13 netmask 0xffffffff broadcast 192.168.49.13
>         inet 192.168.49.17 netmask 0xffffffff broadcast 192.168.49.17
>
> And another OSPF neighbour:
>
> igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         inet 192.168.49.1 netmask 0xffffff00 broadcast 192.168.49.255
>         inet 192.168.49.10 netmask 0xffffffff broadcast 192.168.49.13
>         inet 192.168.49.11 netmask 0xffffffff broadcast 192.168.49.17
>
> This worked for me for years with quagga but frr's ospfd does not form
> neighbourship
> with following errors:
>
> interface igb0:192.168.49.17: ospf_read network address is not same
> [192.168.49.1]
> interface igb0:192.168.49.17: ospf_read network address is not same
> [192.168.49.10]
> interface igb0:192.168.49.17: ospf_read network address is not same
> [192.168.49.11]
>
> It seems ospfd's checks cannot cope with FreeBSD-like IP aliases.
> Please help.
>
>
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>
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