Timeouts on forwarders??
Cris Rhea
crhea at mayo.edu
Fri Feb 15 20:53:19 UTC 2002
I have two machines running BIND. One server is running 8.1.2 the other
is running 9.2.0. For non-local queries that fail, it appears as if
the 9.2.0 server takes twice as long to return "Server failed" than
the 8.1.2 server.
In the example below, mh2000 is a client machine (Sun running Solaris 5.7
with normal Sun resolver libraries), rcf3k is running BIND 8.1.2,
and ldap is running BIND 9.2.0.
mh2000#> time nslookup 208.28.15.16 129.176.212.78
Server: ldap.mayo.edu
Address: 129.176.212.78
*** ldap.mayo.edu can't find 208.28.15.16: No response from server
real 1m15.02s
user 0m0.01s
sys 0m0.02s
mh2000#> time nslookup 208.28.15.16 129.176.212.214
Server: rcf3k.mayo.edu
Address: 129.176.212.214
*** rcf3k.mayo.edu can't find 208.28.15.16: Server failed
real 0m27.73s
user 0m0.00s
sys 0m0.02s
This is a problem because our high volume email server is doing reverse
lookups that often fail (due to the normal nonsense on the Internet). Taking
twice as long to fail is causing problems.
Is there any way to tune the timeouts on the 9.2.0 server to fail
faster for forwarded queries?
I've looked at the docs and the archives, but haven't seen any timeout
issues with forwarders discussed previously (at least 8.X.X versus 9.X.X).
Thanks-
--- Cris
----
Cristopher J. Rhea Mayo Foundation
Research Computing Facility Pavilion 2-25
crhea at Mayo.EDU Rochester, MN 55905
Fax: (507) 266-4486 (507) 284-0587
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