dhcp option 81 from win98se breaks ddns on aix 4.3.3

dhcp option 81 from win98se breaks ddns on aix 4.3.3

Post by Sol Gongol » Sat, 16 Feb 2002 03:12:36



We have AIX 4.3.3 with dhcp/ddns/bind 8

Windows 98se sends FQDN option 81 with its dhcp request.
Microsoft has a fix to not send option 81 but we can't get/use it.

AIX dhcp doesn't recognize option 81, has a problem and
then ignores the option 15 specification in dhcpsd.cnf.

As a result, AIX dhcp doesn't know a domain name, passes it
as null to dhcpaction8 which invokes nslookup with a host name
but no domain name causing name resolution problems.
This is a sample line from from dhcpsd.log:
/usr/sbin/dhcpaction8 'SYSTEM1' '' '192.168.1.153' '345600' BOTH NONIM

Quote:>>/tmp/updns.out 2>&

I am considering modifying dhcpaction8 to default to a domain if one is
not received but don't know enough about possible side effect. Would
this
be the right thing to do?

From dhcpaction8:
   -------------------------------------------------
   if [ -n "$domainname" ]
   then
     machname="$hostname.$domainname"
   else
   # machname="$hostname"                   # Original, don't use domain
if not supplied
     machname="$hostname"."domainname.com"  # NEW, use desired domain
name
   fi
   -------------------------------------------------

Thank you

ADL Data Systems Inc
20 livingstone ave
Dobbs Ferry, NY 10522
phone: 914 591 1800   fax: 914 591 1818

 
 
 

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