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seen Nov 23 at 22:28

Jul
18
revised What's a good network benchmark test?
added 158 characters in body
Jul
18
answered What's a good network benchmark test?
Jul
17
awarded  Yearling
Jul
12
comment Troubleshooting latency spikes on ESXi NFS datastores
The biggest ? I have is why adjusting the TCP window would make a difference... My gut tells me it's something to do with fragmenting those big PDUs over TCP. Something in the networking stack that's choking on it. Just can't think of anything that would fit the behavior we are seeing. If window size was an issue we should see latency constraining bandwidth in the middle of a large transfer, not the beginning, but it's always the first packet of the RPC call... tough one.
Jul
8
answered Troubleshooting latency spikes on ESXi NFS datastores
Jul
8
awarded  Critic
Jul
6
comment Troubleshooting latency spikes on ESXi NFS datastores
Could I get a longer capture? With a couple instances of the timeouts please. It appears to be a 7 second delay in the capture provided? If possible set the decode to treat it all as TCP. Or send me the pcap file and I'll carve it up myself. Additionally what does nfsstat tell us?
Jul
5
comment Troubleshooting latency spikes on ESXi NFS datastores
If I understand this correctly it sounds like NFS is the culprit more than VMware. Have you taken a sniffer capture of what's happening on the network while the NFS mount is waiting? The fact that it's almost exactly 5 seconds in each case says "timeout->retry" to me. I once encountered a similar connection dropping issues with NFS. It was due to the way NFS does fragmentation combined with a flawed router ACL implementation.
Apr
19
answered SBS 2011 Premium versus Cloud
Mar
11
comment How to specify a host ip address to sendmail
Where is the sendmail server located? Is it local to the company's email server?
Mar
10
comment What steps can I take to determin if my server has been hacked?
You're welcome Jason. Glad I could help, score isn't important.
Mar
9
answered What steps can I take to determin if my server has been hacked?
Mar
8
comment Problems using Crystal reports infoview over the internet
See my other answer, it seems to be closer to what you're looking for. I can add the tcp keepalive as well if you prefer.
Mar
8
answered Problems using Crystal reports infoview over the internet
Mar
4
answered Slow NIC activation - Win2008-R2
Mar
4
comment Force Windows Local Subnet Traffic through a Gateway
FYI, if you're concerned at all about bad actors. A routing table only handles layer3 routing decisions. ARP will handle layer2. Given your current setup someone could easily intercept traffic from/to the other nodes using a ARP flood. This is a well known MITM attack and has been in the wild for years. DHCP is broadcast based as well, and someone could cause havoc if you have any DHCP clients (but this is not as commonly seen in the wild).
Mar
4
comment Problems using Crystal reports infoview over the internet
I don't know if Business Objects implements tcp keep alive or not, but you might be able to force it using the following method. tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/#libkeepalive
Mar
4
answered Problems using Crystal reports infoview over the internet
Mar
4
answered why tracert does not show the same gateway address as in ipconfig
Mar
4
answered Sonicwall site-to-site can not access remote network