I'm new to managing networks and I've reached the limit of what I can do on my own by just using google. I tried to find similar questions but didn't find anything like what I'm dealing with at the moment.
Important background info: I'm setting up a 10 gigabit network between two existing servers and one new server. I've installed a new network switch (Netgear Prosafe XS712T), and new network cards in the two old servers (Intel X540T2 10Gb Adapter). The new server has the same network card. All servers are running some flavor of linux (one is running debian, one ubuntu, and one fedora... not my fault...). All of this setup is underneath (exists within) the department network at the university where I work. The speed of that network is 1 gigabit.
What I am trying to do: The goal is to allow high-speed data transfers between our new machine and our old machines, which makes it practical for us to set up a shared directory on the new machine which will mirror to the old ones. We are working with large data sets which can be ~5-10 GB in size.
Current Status: Network cards are installed on all machines. All machines can access the internet. All machines can ping each other. All machines are able to transfer files to and from each other using scp. Driver for network cards (ixgbe) is installed from Intel website, replaced native ixgbe driver. lsmod shows driver module running on all machines.
Network switch appears to function properly* on the new machine. No appreciable delays in internet access, transfers, connections to other machines, etc. For old machines, there appears to be limited-speed/intermittent internet access at times.
*no high speed, though. using scp to transfer files from any one of these machines to any other results in network speeds that match what i would see before i installed the new switch and cards. (~65-70MB/s)
Problems: As stated above, connection speeds have not changed since installation of new network cards/switch. Connections/pings/transfers are often sluggish to start.
Example; a ping from one old server to the other... very sluggish:
mrfox:# ping darjeeling PING darjeeling.xxxxx (xxx.xx.x.xx) 56(84) bytes of data. 64 bytes from darjeeling.xxxxx (xxx.xx.x.xx): icmp_req=1 ttl=64 time=0.124 ms 64 bytes from darjeeling.xxxxx (xxx.xx.x.xx): icmp_req=2 ttl=64 time=0.116 ms 64 bytes from darjeeling.xxxxx (xxx.xx.x.xx): icmp_req=3 ttl=64 time=0.116 ms 64 bytes from darjeeling.xxxxx (xxx.xx.x.xx): icmp_req=4 ttl=64 time=0.110 ms ^C64 bytes from darjeeling.xxxxx (xxx.xx.x.xx): icmp_req=5 ttl=64 time=0.116 ms --- darjeeling.xxxxx ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, **time 32034ms** rtt min/avg/max/mdev = 0.110/0.116/0.124/0.010 ms
The same but from the other direction... not sluggish at all:
Darjeeling:~$ ping mrfox PING mrfox 56(84) bytes of data. 64 bytes from mrfox : icmp_req=1 ttl=64 time=0.103 ms 64 bytes from mrfox : icmp_req=2 ttl=64 time=0.097 ms 64 bytes from mrfox : icmp_req=3 ttl=64 time=0.099 ms 64 bytes from mrfox : icmp_req=4 ttl=64 time=0.100 ms 64 bytes from mrfox : icmp_req=5 ttl=64 time=0.078 ms 64 bytes from mrfox : icmp_req=6 ttl=64 time=0.099 ms 64 bytes from mrfox : icmp_req=7 ttl=64 time=0.095 ms ^C --- mrfox ping statistics --- 7 packets transmitted, 7 received, 0% packet loss, **time 5998ms** rtt min/avg/max/mdev = 0.078/0.095/0.103/0.014 ms
Ping from old server to new server... no sluggishness:
mrfox# ping xxx.xx.x.xxx --- ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 4998ms
Traceroute behaves differently when connecting to one machine in particular:
[moonrise]# traceroute darjeeling traceroute to darjeeling 30 hops max, 60 byte packets 1 * * * 2 * * * 3 * * * 4 * * * 5 * * * etc etc 30 * * *
But behaves normally (i think?) when connecting to any other machine:
[moonrise]# traceroute mrfox traceroute to mrfox ( ), 30 hops max, 60 byte packets 1 mrfox. ( ) 1.799 ms 1.755 ms 1.673 ms
My Questions: It seems like the connection between our machines isn't running at 10Gb like it should. I think it is only running at 1Gb, like the rest of the department's network. What other commands can I use to test the connections between the servers?
If I'm right, what are the next steps in figuring out how to get the machines to interact properly?
How can I determine what is causing the intermittent sluggishness of HTTP connections that I've observed?
Thanks in advance for any responses. I apologize if I've left out any really crucial data here. I will watch the space below for any requests for additional info/terminal output.
Additional ethtool report for new machine (old machines report the same):
ethtool p8p1 Settings for p8p1: Supported ports: [ TP ] Supported link modes: 100baseT/Full 1000baseT/Full 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 100baseT/Full 1000baseT/Full 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 10000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: external Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes
ping -n report from new to old server:
[ moonrise ]# ping -n 137.82.xx.xx PING 137.82.x.xx (137.82.xx.xx) 56(84) bytes of data. 64 bytes from 137.82.xx.xx: icmp_seq=1 ttl=64 time=0.205 ms 64 bytes from 137.82.xx.xx: icmp_seq=2 ttl=64 time=0.129 ms 64 bytes from 137.82.xx.xx: icmp_seq=3 ttl=64 time=0.131 ms 64 bytes from 137.82.xx.xx: icmp_seq=4 ttl=64 time=0.136 ms 64 bytes from 137.82.xx.xx: icmp_seq=5 ttl=64 time=0.157 ms 64 bytes from 137.82.xx.xx: icmp_seq=6 ttl=64 time=0.131 ms ^C --- 137.82.xx.xx ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 5000ms rtt min/avg/max/mdev = 0.129/0.148/0.205/0.028 ms
previously sluggish ping command with -n flag and no DNS:
root@mrfox:# ping -n 137.82.xx.xx PING 184.108.40.206 (137.82.xx.xx) 56(84) bytes of data. 64 bytes from 137.82.xx.xx: icmp_req=1 ttl=64 time=0.139 ms 64 bytes from 137.82.xx.xx: icmp_req=2 ttl=64 time=0.112 ms 64 bytes from 137.82.xx.xx: icmp_req=3 ttl=64 time=0.111 ms 64 bytes from 137.82.xx.xx: icmp_req=4 ttl=64 time=0.117 ms 64 bytes from 137.82.xx.xx: icmp_req=5 ttl=64 time=0.114 ms ^C --- 137.82.xx.xx ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 3999ms rtt min/avg/max/mdev = 0.111/0.118/0.139/0.015 ms