Forum Discussion
Gavin_104961
Nimbostratus
Nimbostratuscannot use pool command in a UDP vs
Hi guys,
Here is the iRules with UDP VS problem, when the iRules works, i found TCL error msg in log file, and without pool command it works well, who can help me find the reason cause it, thx.
bye the way, the very similar iRules in TCP VS works ok.
May 7 15:07:49 tmm tmm[2239]: 01220001:3: TCL error: DNS_Rules - Address in use (line 8) invoked from within "pool dns"
May 7 15:07:49 tmm tmm[2239]: 01220002:6: Rule DNS_Rules : dns
iRules for UDP VS:
=============================================
when CLIENT_DATA {
binary scan [UDP::payload] H* gdata
set fdata [substr $gdata 23 1]
if { $fdata eq "1" } {
pool dnssec
log "dnssec"
} elseif { $fdata eq "0" } {
pool dns
log "dns"
} else {
drop
}
}
iRules for TCP VS:
=============================================
when CLIENT_ACCEPTED {
TCP::collect
}
when CLIENT_DATA {
binary scan [TCP::payload] H* gdata
log "$gdata"
set fdata [substr $gdata 27 1]
if { $fdata eq "1" } {
pool dnssec
log "dnssec"
} elseif { $fdata eq "0" } {
pool dns
log "dns"
} else {
drop
}
TCP::release
}
hoolioCirrostratus
Hi Gavin,
Check cmbhatt's handy explanation in this post:
http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=2195922045
The "address in use" usually means a node in a pool has already been selected and you're trying to re-select another without detaching first. The solutions I've seen for that are either add the "LB::detach" command before choosing a new node in a pool or add a OneConnect profile to the virtual server.
Aaron
Gavin_104961Thanks ur reply, Aaron.
i have trid LB:detach, but i still got the error message.- Nat_Thirasuttakorn
Employee
you may enable "datagram lb" option in UDP profile and probably use CLIENT_ACCEPTED instead of CLIENT_DATA
if it still does not work for you, may use "immediate timeout". if you use immediate timeout, you may need another virtual server listening on serverside for returning traffic. (or use nPath) - Gavin_104961after change EVENT to CLIENT_ACCEPTED iRules works, thx natty76.
seems it's very different between UDP and TCP EVENTS.