deleting an alias from interface cause the static route to be deleted

[Damien Fleuriot]

On 20 Feb 2012, at 21:06, Коньков Евгений <kes-kes at yandex.ru> wrote:

> 
> vlan74: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        options=3<RXCSUM,TXCSUM>
>        ether f4:6d:04:7c:7b:d3
>        inet6 fe80::f66d:4ff:fe7c:7bd3%vlan74 prefixlen 64 scopeid 0xd
>        inet 10.1.26.1 netmask 0xfffffe00 broadcast 10.1.27.255
>        inet 10.1.26.3 netmask 0xfffffe00 broadcast 10.1.27.255
>        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>        media: Ethernet autoselect (1000baseT <full-duplex>)
>        status: active
>        vlan: 74 parent interface: re0
> 
> ifconfig vlan74 delete 10.1.26.1
> 
> will delete these static routes from route table:
> 
> 10.3.0.1           10.7.26.2          UGHS        8      367 vlan74
> 10.1.6.0/23        10.7.26.2          UGS       275   166969 vlan74
> 
> Does this a bug?
> 

I don't know if it's a bug or intended, but I do know you should use /32 aliases for additional IPs, not your original netmask.