Using ifconfig to reset the interface does not work: ifconfig en0 down ifconfig en0 up Neither does flushing the route table: route -n flush I also tried resetting the DNS cache completely irrelevant, but I figured I would give it a try anyway. Click the Advanced button.
Select "OK" Select "Apply". Do steps 4 - 8 again, but replace 6 with your desired IP configuration method. Chuck Wolber. Chuck Wolber Chuck Wolber 1 1 gold badge 1 1 silver badge 7 7 bronze badges.
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Have you checked with Juniper TAC about this? Anytime the network connection drops long enough to kill the VPN I get left in this state. Occasionally the wifi will have a hiccup, or perhaps I closed the laptop before properly disconnecting, etc. Contacting Juniper TAC simply not an option in my particular case. My experience is when I am connected via VPN through a Wi-Fi connection and the Wi-Fi connection stops responding due to session policy, network failure, etc.
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You can kill the client and restart it, and even turn Wi-Fi off and on, but the client will never reconnect without a reboot. Not without Sunil P's answer below. These commands worked for me. Hyppy Sunil P Sunil P 96 3 3 bronze badges. Works great. If doing this remotely e. TeamViewer , the first command on its own will presumably break the connection, so run both commands on the same line, separated by a semicolon. In my case there were different names, networksetup -listallnetworkservices tells all. Usage: networksetup -listnetworkserviceorder Display services with corresponding port and device in order they are tried for connecting to a network.
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Usage: networksetup -listallnetworkservices Display list of services. Patrick Tudor Patrick Tudor 4 4 bronze badges. Falcon Momot 23k 10 10 gold badges 52 52 silver badges 80 80 bronze badges. Wagner Jonathan. Wagner 11 2 2 bronze badges. Janne Pikkarainen Janne Pikkarainen 29k 3 3 gold badges 44 44 silver badges 70 70 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Does it happen right away on the initial request or is it further into an established session that you see the behavior? One thought is that you may want to disable OCSP certificate validation if you have that enabled.
That is one more added delay to the process.
If you are really experiencing msecs delay one way, that adds nearly 2 seconds for every request response exchange that must occur during the handshake. There are a minimum of 3 exchanges that must occur during SSL negotiation with multiple packets in both directions. The other problem with SSL is that it can perform a re-negotiation at any time during a session.
Then you have to go through the entire process again.
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It could be that the sites you are connecting to that display this problem behavior are tuned more aggressively to renegotiate session keys frequently and you see failure in the process due to the long latency and potentially any packet loss that might occur. The higher the latency, the more devastating any single dropped packet can be to a connection just due to the way the timers work.
Unfortunately for real-time exchanges like SSL negotiation, there is not much you can really do on the TCP stack to make it better. It is what it is. The only thing I can think of is to tune any SSL settings in the browser to make it is lightweight as possible from a negotiation standpoint. Disable certificate validation. This allows for many parallel object requests per TCP connection instead of waiting for each object request to complete before requesting the next one. The number of parallel TCP connections your browser supports seems to be the most effective way to increase page load times.
Most browsers default to 4 or 6 connections. If you can increase this value to maybe 10 to 12, you may see a significant improvement in page load times, too. Be careful with how high you crank the simultaneous connection counts. Some sites may have limits per client and slow you down or block you if they detect what they consider to be abuse.
By: rolande on July 12, at pm. Mark, you can not tune the settings on iOS devices. Those devices are locked down. Typically the default settings are fine for normal data transfer. By: rolande on July 23, at pm. Scott u may want to try yosemite. I made some changes in the sysctl, the system just wont consider it.
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That could actually be a good thing. By: rolande on July 25, at pm. Anyone who tried this in Yosemite?
After seconds, whatever pathological condition is happening resolves, and function returns, but this behavior repeats. There is no CPU usage and no network activity during the hang; attempts to use a web browser also hang. Additional notes: — isolating to two machines in cisco gigabit switch no other network connectivity , client hitting server with 32 threads, same problem.
I just did a netstat -m. Something is definitely messed up. I am not doing anything active on the network. I have Gmail and Google Drive open and a LastPass plugin running which all generate connections but mostly sit idle. Only mbufs available? That is totally wrong. It should be Definitely going to look into what is going on here.
By: rolande on January 4, at pm. Rolande: this confused me too: mbufs start very low. The system allocates more memory as needed. I was confused by seeing very low memory, thinking that the boot-args settings was broken.
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When this happens a second hangs until the networking stack recovers estimate, I did not time it ; it kills many connections as well as all other networking on the system. I just got a new NAS running a 2 x 1Gig copper Etherchannel on it and was moving large amounts of data over. Definitely going to have to test it out now.