Forum Discussion
Radius uie persistence and CMP compatibility
We have a Radius LB PoC, we used the irule published in devcentral http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=187
I changed the $attr_code1 to 4 so that using NAS-IP-Address for persist.
when CLIENT_ACCEPTED {
binary scan [UDP::payload] ccSH32cc code ident len auth \
attr_code1 attr_len1
set index 22
while { $index < $len } {
set hsize [expr ( $attr_len1 - 2 ) * 2]
binary scan [UDP::payload] @${index}H${hsize}cc attr_value \
attr_code2 attr_len2
If it is State(24) attribute...
if { $attr_code1 == 4 } {
persist uie $attr_value 30
return
}
set index [ expr $index + $attr_len1 ]
set attr_len1 $attr_len2
set attr_code1 $attr_code2
}
}
In order to simplify the problem, SERVER_DATA event was removed.
The BIG-IP version is 9.4.7 and the platform is ltm3600, in the test, we found the UIE persistence didn’t work well. Please see blow irule log:
Apr 27 20:21:20 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:20 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.152
Apr 27 20:21:21 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:21 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.148
Apr 27 20:21:21 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:21 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.152
Apr 27 20:21:21 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:21 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.148
Apr 27 20:21:21 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:21 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.152
Apr 27 20:21:22 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:22 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.148
Apr 27 20:21:22 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:22 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.152
Apr 27 20:21:22 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:22 tmm tmm[1856]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.148
Apr 27 20:21:22 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : Using persist c0a86e24
Apr 27 20:21:22 tmm1 tmm1[1868]: Rule AAA_NASIP_Persist_Irule : The Selected Server is $192.168.110.152
You can find the same c0a86e24, two servers were selected round robin.
I noticed both tmm and tmm1 are working. My question is that, should I disable CMP in order to make this iRule work in 9.4.7. We hoped to use CMP in order to get better performance, should I change UIE persistence to session, will it is helpful to make this irule to work by upgrading to parkcity.
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