icmp routing redirects becoming static routes

Tru64UNIX V5.1A sp1
 
The good answer is to upgrade to V5.1B and set the inet parameter called
icmp_redirecttimeout.  We're saving the 5.1B upgrade for future
application upgrade when it will be more know what version of the
database is used and on what Tru64UNIX version it is supported.
 
Problem:  icmp routing redirects (natural to tcp) are essentially
becoming static routes as they don't time out or leave the table
(netstat -r | more).  These resident and stay static redirects can
become black holes.
 
Options are:

1) upgrade to 5.1B
2) disable reacting to routing redirects:
 	#dbx -k /vmunix
	dbx> assign|patch icmp_rejectcodemask=32
	dbx> q
3) manually delete (route delete -host $hostname $gatewayname)
4) cron a shell script for #3 (netstat -r | grep UGHD, use AWK, run loop
w/ route delete)
5) reboot frequently

I'd like to try #4, say cron'ing every 10 minutes.

Any strong feelings about cron'ing a shell script #4, or to not reacting
to the redirect #2?

Has anybody tried #4, or anticipate any problems doing this?

Best Regards,	Blake

Blake Brehl
Sys Admin/DBA
Anritsu Company United States
Morgan Hill, CA 


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