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Jul
22
comment NAS recommendation for Xenserver
I'm guessing that this question is going to get closed, or at least moved to softwarerecs.stackexchange.com. Most of the StackExchange sites stopped allowing product recommendations (see the FAQs).
May
13
comment ASA failover mode switching from Active/Active to Active/Standby
Did you ever get a good answer on this? What was the solution?
Jan
23
comment Linux network interfaces take so long to come up
+1 Sounds like someone needs to do a "portfast enable".
Jul
1
comment Allow sudo without su
Sudo is really meant for whitelisting, but your answer is in another ServerFault question, here: serverfault.com/a/36768/37815.
Jun
10
comment BIND as secondary DNS to Windows Server 2012. Windows complains that BIND is “not authoritative”
Do you have an NS record for the secondary server in the primary server's configuration?
May
22
comment Full MTU not utilized with jumbo frames enabled
+1 for having tried "quackery".
May
21
comment FreeBSD routing for multiple subnets
Without knowing the specific symptoms of "does not work", it is pretty hard to make any kind of a real guess. In addition to that information, it might also be useful to include the results of "netstat -rn", so we can see the routing table (also available via "route show".
May
21
comment Is there any possible way in which unicast packet from one machine sent to two machines?
This will also happen if you have a hub instead of a switch. This behavior is typically called "flooding".
May
12
comment Making a reverse zone file on a 255.0.0.0 subnet
What DNS server are you using?
May
1
comment Debian server - DNS stopped working after static IP reassignment
This statement is confusing: "when I access one of the websites hosted in that server through a browser, if that website tries to access google.com, for example, ping stops returning successful requests." Can you please elaborate/explain it differently?
May
1
comment Debian server - DNS stopped working after static IP reassignment
I'm with Zoredache, this is almost certainly not a DNS issue.
Apr
7
comment How to use iSCSI MPIO to increase bandwidth with XenServer?
Youch! That is quite the string of bad questions. I prescribe alcohol to help you cope.
Apr
7
comment How to use iSCSI MPIO to increase bandwidth with XenServer?
I agree. I had mistakenly assumed the goal here was to educate, not just to provide the most professional answer. You are absolutely correct, and in my professional career I would never give such a detailed answer, because it does give the false assumptions in the question more credit than they deserve. Providing such a detailed response to a client would not be an effective use of time. It is far better to say "do it right, trust me, I'm a professional" than to help someone understand implement a solution to the wrong question. As I said, I'll try to keep your technique in mind.
Apr
7
comment How to use iSCSI MPIO to increase bandwidth with XenServer?
So, what I said, except less explanation, less words, and a day later. I shall keep your technique in mind for future answers, clearly it works.
Apr
7
comment How to use iSCSI MPIO to increase bandwidth with XenServer?
@Matt is correct here, as is joeqwerty. Trust us, go with LACP; it is the best your are going to get in this particular configuration.
Mar
17
comment Storage Network Stops Transmitting Traffic
+1, this was going to be my guess as well.
Feb
14
comment Does it make sense to create a “private” host-only network or vSwitch for VM-only communication on a VMware vSphere host?
Am I correct in understanding that the VMs are doing the VLAN tagging in your scenario for the VM to VM traffic?
Oct
3
comment Openvpn, forward packets very slowly
When I'm troubleshooting vpn issues like this, I basically get 4 packet captures (after checking that CPU isn't bound up anywhere): 1) client inside, 2) client outside, 3) server inside, 4) server outside. On the client side, if you are pushing all traffic through the tunnel, then capture all the traffic. On the server side, filter to just that client's internal and external IPs, but don't filter any further.
Oct
3
comment Openvpn, forward packets very slowly
Can you upload the tcpdump files in binary tcpdump format? This will make it easier to analyze in a tool such as wireshark (which makes this sort of debugging MUCH easier). Also, can you please tcpdump both the internal and external sides of the connection (simultaneously, if possible)? I.e. if you have packets to compare from tun0 and from eno1, it should be a piece of cake to figure out what is wrong.
Sep
30
comment Openvpn, forward packets very slowly
Can you add cpu information from the client and server while the traffic is being transferred?