Wireshark mailing list archives
Re: TCP connection is still in ESTABLISH state actually it is disconnected
From: Jack Jackson <jack () pebbleridge com>
Date: Sun, 30 May 2010 12:01:43 -0700
At 11:16 AM 5/30/2010, Bo Xu wrote:
Hello Guys , Today I have found 2 TCP connection is in ESTABLISH state while the peer side said they have already disconnected the connection , but even they stopped the application , the 2 TCP connection is till there :( . Now I am wondering when the OS will release these 2 fake ESTABLISH connection . I digged this issue by google , and I have found these parameter in my OS which is AIX 5.8 . So AIX will release these 2 connection according the tcp_keepidle (2 hours ) , Am I right ? And what tcp_keepintvl stands for ? tcp_keepidle = 14400 tcp_keepinit = 150 tcp_keepintvl = 150
My understanding is that tcp_keepidle is the time before the first keep-alive probe is sent. If no response is received, tcp_keepintvl determines how often subsequent probes are sent. tcp_keepcnt determines how many probes are sent without a response before the connection is dropped. Since I believe those values for AIX are in unit of 1/2 seconds, after 2 hours the first probe will be sent. Every 75 seconds another probe will be sent. When the tcp_keepcnt number have been sent (probably something like 8) with nothing received, the connection will be dropped. So I would expect the connection to be dropped about 2 hours and 11 minutes after the connection goes idle. ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- TCP connection is still in ESTABLISH state actually it is disconnected Bo Xu (May 30)
- Message not available
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Jack Jackson (May 30)
- Message not available
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Andrew Hood (May 30)
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Bo Xu (May 31)
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Andrew Hood (May 31)
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Bo Xu (May 31)
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Andrew Hood (May 31)
- Re: TCP connection is still in ESTABLISH state actually it is disconnected Bo Xu (May 31)