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From: Johann Hugo <jhugo@meraka.csir.co.za>
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Date: Tue, 7 Oct 2008 11:52:57 +0200
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Subject: "route flush" does not delete routes created with -interface option
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Is there a way to get rid of all the routes in a routing table ?

This is more or less what I do:

route add 146.64.80.0/24 192.168.0.100
route add 146.141.0.0 -interface tun1
route add 146.182.0.0 -interface tun1
route add 146.230.0.0 -interface tun1

netstat -rn inet
146.64.80.0/24     192.168.0.100      UGS         0        0   sis0
146.141.0.0/16     tun1                      US           0        0   tun1
146.182.0.0/16     tun1                      US           0        0   tun1
146.230.0.0/16     tun1                      US           0        0   tun1

If I do "route -n flush -inet" then it does not delete the routes created with 
a -interface option. see verbose output:

route -vn flush -inet
RTM_GET: Report Metrics: len 204, pid: 0, seq 0, errno 0, 
flags:<UP,GATEWAY,STATIC>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA>
 146.64.80.0 192.168.0.100 (255) ffff ffff ff sis0:0.0.24.c7.8b.80 
192.168.0.44
RTM_DELETE: Delete Route: len 204, pid: 0, seq 2, errno 0, 
flags:<UP,GATEWAY,STATIC>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA>
 146.64.80.0 192.168.0.100 (255) ffff ffff ff sis0:0.0.24.c7.8b.80 
192.168.0.44
RTM_GET: Report Metrics: len 260, pid: 0, seq 0, errno 0, flags:<UP,STATIC>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA,BRD>
 146.141.0.0 tun1 (255) ffff ffff tun1 dsl-146-145-96.telkomadsl.co.za 
dsl-146-144-01.telkomadsl.co.za
RTM_GET: Report Metrics: len 260, pid: 0, seq 0, errno 0, flags:<UP,STATIC>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA,BRD>
 146.182.0.0 tun1 (255) ffff ffff tun1 dsl-146-145-96.telkomadsl.co.za 
dsl-146-144-01.telkomadsl.co.za
RTM_GET: Report Metrics: len 260, pid: 0, seq 0, errno 0, flags:<UP,STATIC>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA,BRD>
 146.230.0.0 tun1 (255) ffff ffff tun1 dsl-146-145-96.telkomadsl.co.za 
dsl-146-144-01.telkomadsl.co.za

uname -a
FreeBSD groenwifi.cids.org.za 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #19: Tue 
Aug 26 13:40:13 UTC 2008