how to set address_match_list with too many ip class C?

[Kevin Darcy]

xiao at info.sta.net.cn wrote:

> But how can get rid of a.b.0.0~a.b.191.255
> can I set like a.b.192.0/18 ?
> BTW
> if I want x.y.0.0~x.y.127.255
> can I set like x.y.0.0/17 ?

Sorry, I didn't look closely enough at the address ranges. a.b.0.0-a.b.191.255 can be expressed
as a.b/17 plus a.b.128/18. a.b.192.0-a.b.255.255 can be expressed as a.b.192/18.
x.y.0.0-x.y.127.255 can be expressed as x.y/17.


- Kevin

> Kevin Darcy <kcd at daimlerchrysler.com> wrote in message news:<abv2f1$3iv2$1 at isrv4.isc.org>...
> > Do you understand prefix notation? You can just write a.b/16.
> >
> >
> > - Kevin
> >
> > xiao at info.sta.net.cn wrote:
> >
> > > Hi,
> > >
> > >   I have a question about how to set address_match_list, if I have
> > > many Class C IP Address?
> > > like a.b.192.0~a.b.255.255
> > > should I write a.b.192/24;a.b.193/24;......a.b.255/24;
> > > I think that's too much.
> > > Or can I short that,or I have to write like that?
> > >
> > > thank you