Maximum count of ms-classless-static-routes

[Yuriy Ohonin]

On Thu, 2009-07-09 at 13:29 +1000, Glenn Satchell wrote:
> There is a limit to how big a DHCP packet can be, and this can limit
> the total size of all the options. 
As for as i know, maximum packet size is 4KB. This is much more than 31
routes even in big unoptimazed string format. Maybe, i'm wrong, what is
the maximum packet size in this case?

> Suggest you set up the router to
> know all the routes if possible, and only give the client pc a default
> route to that router.
Thanks, but this is not possible :(
> 
> regards,
> -glenn
> 
> >Subject: Maximum count of ms-classless-static-routes
> >From: Yuriy Ohonin <yuriy at krk.ru>
> >To: dhcp-users at lists.isc.org
> >Date: Thu, 09 Jul 2009 11:16:41 +0800
> >
> >Hello,
> >
> >I'm not able to set more than 31 static routes via dhcpd.
> >(using "option ms-classless-static-routes")
> >Well, i can write config file, but client pc (os windows xp home) does
> >not accept them.
> >
> >Here is the config:
> >
> ># New_Subnet_3824
> > subnet 172.27.19.0 netmask 255.255.255.224 {
> >        authoritative;
> >        option domain-name "orionnet.ru";
> >        option domain-name-servers 80.65.20.1,80.65.16.1;
> >        option routers 172.27.19.30;
> >        deny unknown-clients;
> >
> >option ms-classless-static-routes 23, 62,33,58, 172,27,19,30, 23,
> >62,33,66, 172,27,19,30, 24, 62,213,55, 172,27,19,30, 24, 62,213,56,
> >172,27,19,30, 21, 79,99,216, 172,27,19,30, 27, 80,82,189,32,
> >172,27,19,30, 21, 80,91,192, 172,27,19,30, 24, 80,91,207, 172,27,19,30,
> >24, 80,237,84, 172,27,19,30, 24, 80,237,107, 172,27,19,30, 23,
> >80,240,34, 172,27,19,30, 24, 83,234,36, 172,27,19,30, 24, 83,234,173,
> >172,27,19,30, 28, 83,234,173,128, 172,27,19,30, 21, 84,22,128,
> >172,27,19,30, 21, 84,22,136, 172,27,19,30, 24, 84,22,136, 172,27,19,30,
> >24, 84,22,137, 172,27,19,30, 24, 84,22,138, 172,27,19,30, 24, 84,22,139,
> >172,27,19,30, 28, 84,22,139,224, 172,27,19,30, 24, 84,22,140,
> >172,27,19,30, 24, 84,22,141, 172,27,19,30, 24, 84,22,142, 172,27,19,30,
> >24, 84,22,143, 172,27,19,30, 21, 84,22,144, 172,27,19,30, 24, 84,22,152,
> >172,27,19,30, 24, 84,22,154, 172,27,19,30, 24, 84,22,155, 172,27,19,30,
> >24, 84,22,156, 172,27,19,30, 24, 84,22,157, 172,27,19,30, 24, 84,22,158,
> >172,27,19,30, 24, 84,22,159, 172,27,19,30, 29, 87,103,152,96,
> >172,27,19,30, 22, 87,236,40, 172,27,19,30;
> >option rfc3442-classless-static-routes 23, 62,33,58, 172,27,19,30, 23,
> >62,33,66, 172,27,19,30, 24, 62,213,55, 172,27,19,30, 24, 62,213,56,
> >172,27,19,30, 21, 79,99,216, 172,27,19,30, 27, 80,82,189,32,
> >172,27,19,30, 21, 80,91,192, 172,27,19,30, 24, 80,91,207, 172,27,19,30,
> >24, 80,237,84, 172,27,19,30, 24, 80,237,107, 172,27,19,30, 23,
> >80,240,34, 172,27,19,30, 24, 83,234,36, 172,27,19,30, 24, 83,234,173,
> >172,27,19,30, 28, 83,234,173,128, 172,27,19,30, 21, 84,22,128,
> >172,27,19,30, 21, 84,22,136, 172,27,19,30, 24, 84,22,136, 172,27,19,30,
> >24, 84,22,137, 172,27,19,30, 24, 84,22,138, 172,27,19,30, 24, 84,22,139,
> >172,27,19,30, 28, 84,22,139,224, 172,27,19,30, 24, 84,22,140,
> >172,27,19,30, 24, 84,22,141, 172,27,19,30, 24, 84,22,142, 172,27,19,30,
> >24, 84,22,143, 172,27,19,30, 21, 84,22,144, 172,27,19,30, 24, 84,22,152,
> >172,27,19,30, 24, 84,22,154, 172,27,19,30, 24, 84,22,155, 172,27,19,30,
> >24, 84,22,156, 172,27,19,30, 24, 84,22,157, 172,27,19,30, 24, 84,22,158,
> >172,27,19,30, 24, 84,22,159, 172,27,19,30, 29, 87,103,152,96,
> >172,27,19,30, 22, 87,236,40, 172,27,19,30;
> >
> >
> ># ussa60 1-2
> >        host orion_14 {
> >                hardware ethernet 00:22:15:15:ae:5a ;
> >                fixed-address 172.27.19.2 ; }
> >}
> >
> >Any ideas how to fix this problem?
> >
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