On Fri, Oct 22, 1999 at 09:58:44AM +0200, Graham Wheeler wrote:
> On Thu, 21 Oct 1999, Ruslan Ermilov wrote:
> > On Thu, Oct 21, 1999 at 06:50:07PM +0200, Graham Wheeler wrote:
> > > Hi all
> > >
> > > Is it possible to assign an IP alias to a point to point interface (in my case,
> > > a sync PPP interface)? It doesn't seem to be possible, but perhaps I'm
> > > missing something...
> >
> > Yup, that's possible but is somewhat tricky:
> >
> > # ifconfig ptpN inet X.X.X.X X.X.X.X alias
> > # route delete -host X.X.X.X
> > # route add -host X.X.X.X -gateway 127.1
> > # ping X.X.X.X
>
> I should have mentioned that ip forwarding is turned off so that routing
> via the loopback interface is not an option...
>
The above commands do not rely on the host's forwarding capabilities.
The first `route' command will remove the weird `X.X.X.X via X.X.X.X' entry.
The second `route' command will install the route allowing you to communicate
with X.X.X.X from this host itself. Look:
: relay# ifconfig sl9 inet 1.1.1.1 1.1.1.1 alias
: relay# netstat -rn | grep ^1.1.1.1
: 1.1.1.1 1.1.1.1 UH 0 0 sl9
: relay# ping 1.1.1.1
: PING 1.1.1.1 (1.1.1.1): 56 data bytes
: ^C
: --- 1.1.1.1 ping statistics ---
: 2 packets transmitted, 0 packets received, 100% packet loss
: relay# route delete -host 1.1.1.1
: delete host 1.1.1.1
: relay# route add -host 1.1.1.1 127.1
: add host 1.1.1.1: gateway 127.1
: relay# netstat -rn | grep ^1.1.1.1
: 1.1.1.1 127.0.0.1 UGHS 0 0 lo0
: relay# ping 1.1.1.1
: PING 1.1.1.1 (1.1.1.1): 56 data bytes
: 64 bytes from 1.1.1.1: icmp_seq=0 ttl=255 time=0.108 ms
: 64 bytes from 1.1.1.1: icmp_seq=1 ttl=255 time=0.170 ms
: 64 bytes from 1.1.1.1: icmp_seq=2 ttl=255 time=0.208 ms
: ^C
: --- 1.1.1.1 ping statistics ---
: 3 packets transmitted, 3 packets received, 0% packet loss
: round-trip min/avg/max/stddev = 0.108/0.162/0.208/0.041 ms
--
Ruslan Ermilov Sysadmin and DBA of the
[EMAIL PROTECTED] United Commercial Bank,
[EMAIL PROTECTED] FreeBSD committer,
+380.652.247.647 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
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