List routers that ConfigMgr / SMS knows about
Select
RASIP.IP_addresses0,
RASR.System_roles0
from
dbo.v_RA_System_IPAddresses RASIP,
dbo.v_RA_System_SystemRoles RASR
where
RASR.ResourceID = RASIP.ResourceID
and RASR.System_Roles0 = 'Router'
Read the complete post at http://smsug.ca/blogs/garth_jones/archive/2008/09/06/list-routers-that-configmgr-sms-knows-about.aspx