When I run the show service-policy I can find info about dropped connectios, but What is the cause of a "dropped connection" ?
Server? LAN? LoadBalancer?
What is understood for a "dropped connection"?
Dropped connection is not the same tha a timeout seesion. Isn´t it?
Status : ACTIVE
Interface: vlan 1 16 21
L7 loadbalance policy: Virtual_WEB02-app_http-l7slb
VIP ICMP Reply : ENABLED-WHEN-ACTIVE
VIP State: INSERVICE
VIP DWS state: DWS_DISABLED
Persistence Rebalance: DISABLED
curr conns : 1361 , hit count : 265760
dropped conns : 9582
conns per second : 0
client pkt count : 1576014 , client byte count: 195873255
server pkt count : 1472400 , server byte count: 630313128
conn-rate-limit : 0 , drop-count : 0
bandwidth-rate-limit : 0 , drop-count : 0
bytes_in : 0 bytes_out : 0
Compression ratio : 0.00%
Gzip: 0 Deflate: 0
User-Agent : 0 Accept-Encoding : 0
Content size: 0 Content type : 0
Not HTTP 1.1: 0 HTTP response error: 0
I found useful info about it in
The dropped conns counter under a VIP in the output of the show service policy detail command is incremented whenever the ACE discards a connection request destined to that VIP. There are several reasons why the ACE discards such connection requests. For example:
About the second point (URL unknown). Is this a 404 error?
The reason for the drop is usually the server did not respond or server responded with a RST or no server were active.
It might not be detectable, because a browser will usually retry immediately if it does not get a response.
Secind point of unknown URL could be a condition of L7 poilcy map where our L4 VIP class has hit and connection is accepeted, 3 way TCP handshake completeted by ACE with client but then client send L7 payload which doesn't match to any L7 class map and thats why ACE drop the connection.
Hope this help.
No, the situatuion which i have explained, ACE will send a RST to close the connection. Also i guess 404 is legitmate reply from server and should not be considered as a drop, unless server is sending a RST to close the same.