EMC NS20 / Switch For Testing / Prototyping 10Gbe Rollout?
Jun 15, 2011
We have a 5 node VMWare cluster connected to an EMC NS20 using VMWare over NFS.Right now, our only bottleneck is network and even that is not limiting. We are considering updating our infrastructure and since networking seems to be the the only real issue, they want me to research that first.So I thought I would get a server, throw in a 10Gbe NIC, get a cheapo 10Gbe switch, get some cheapo NAS (or build one) that can do 10Gbe and start testing...Wrong. What a CF 10Gbe still is. At first I just assumed I'd go with 10Gbe over copper. How naive of me. So once I realized that the most "cheapo" 10GBase-T copper switch would run me about $9,000, I shrugged and starting looking at 10Gbe over optics...
IS there a cheapo (relatively) switch out there for someone wanting to test 10Gbe?? Like $5,000 or less?EDIT: BTW, before this goes off-topic into teaming 1Gbe connections being good enough and such, let me say that we are planning for the future here. As I said, we aren't currently limited in any area right now. However, we see that if there was an area we need to focus on, it would be network. So to that end, we'd like to start testing what the future has to offer. We've already tested and are using link aggregation and such at the 1Gbe level.
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Mar 8, 2012
I am looking for a Switch with a 10GBE uplink to go with a qnap TS879u with a 10 GBE card.
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Oct 22, 2012
We're looking for Cisco switches with the following attributes to serve as the core switches in a production network:1U (or close), fixed config20 or more 1GbE copper ports4 or more 1/10GbE fiber ports (SFP+)Not ridiculously expensive So far the closest fit we've found for these requirements is the SG500X-24. However, since the SG500X-24 is a "small business" switch we're concerned that the reliability may not be up to the levels of Cisco's enterprise switches, the support level may not be sufficient, the 12MB packet buffer may not be enough to support wire-speed operation (or efficient communication between hosts on 1GbE and 10GbE ports), and so on. But in looking through Cisco's entire current switch line (a daunting task...) this seems to be the switch that best fits the specifications above. So, some more appropriate switch that fits the listed requirements?s why the SG500X-24 would be a poor choice for a production network? Have you had positive experiences with using the SG500X-24 as a mission-critical switch?
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Nov 7, 2012
9x3750E stacked switch (WS-C3750E-48PD-SF0) (15.0(1)SE2
C3750E-UNIVERSALK9-M)
2x10Gbe uplinks from EMC NAS
At a basic level, we have found that the 10Gbe uplinks have slow read performance with or without a port-channel configured (2-3 minutes for a 700MB file to desktop from the NAS) We switched back to testing a 1Gbe and the read speed is normal. Another anomaly is Win7 / 2008 machines read speed is fine from the NAS while the 10Gbe uplinks are in production?!
Write speed is great on 10Gbe. Only read speed is affected!! the switch is not reporting anything abnormal. We looked at SMB/SMB2 as another possible cause...
mls qos is enabled on the switch but not sure if this is affecting performance.
Is the ANY config that I need to carry out on the interfaces to get the read speed working as it should for both Win7 and WinXP. (MTU is 1500 throughout the enterprise, NAS included).
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Dec 9, 2012
What is the case with redundant Sup engine 10GbE interfaces. We can only get one in active state, the other interface stays inactive? Can we have all four interfaces active sharing the backplane?
Mod Ports Card Type Model
---+-----+--------------------------------------+------------------+-----------
3 6 Sup 7L-E 10GE (SFP+), 1000BaseX (SFP) WS-X45-SUP7L-E
4 6 Sup 7L-E 10GE (SFP+), 1000BaseX (SFP) WS-X45-SUP7L-E
Mod Redundancy role Operating mode Redundancy status
----+-------------------+-------------------+----------------------------------
3 Active Supervisor SSO Active
4 Standby Supervisor SSO Standby hot
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Dec 13, 2011
My company is moving the datacenter to our new building on Saturday, however the users will remain at the old building until late next month so they bought a 100M Metro E VPLS circuit through their ISP. I went to test it today but could not ping the workstation from my laptop. I wanted to do some bandwidth testing with iperf but could never get to that point because ICMP connectivity wasn't even there. From what I understand, VPLS is just a layer 2 extension so they way I'm testing the circuit below SHOULD work, but it isn't. Spoke with the ISP and they tested the circuit end-to-end on their equipment which was fine so am I missing something?
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Jun 14, 2012
how can i check my wirless lan card, i have a wireless internet connection at home but now a days i am getting low speed on laptop and signals on the wireless device are full but on my laptop i am getting less signals.
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May 25, 2011
We are having issues transferring a 200GB VHD file across our point to point without being corrupted in the process. Any good application for testing the line quality across the point to point?Preferably we want something free, but if there is an in depth tool that costs money, we are open to that option as well.
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Apr 27, 2012
I always test ethernet family links(E, Fa, Gi) sending pings with MTU equal to 1500. Since most hosts uses MTU 1500 I think is not necessary to test using a high MTU size like 18024.
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Sep 11, 2012
why using ping to test the functionality of an ACL could proove insufficient?
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Feb 28, 2013
At our small business I would like to be able to test connecting to some of our websites as an external IP address user outside of our network although still being physically connected to the internal network. Any thoughts on the simplest way to set this up? I have the capability to setup vlans on our switch, could I make one of the vlans/ports have an external connection instead of an internal?
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Jan 3, 2013
I have 2 routers on 1 the internet work fine on the other the internet not work and I see this when I start diagnostic "Testing ADSL Synchronization---fail"
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Aug 12, 2011
What is the purpose of loop back testing.
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Mar 6, 2012
I have a lab setup and I want to test a point-to-point connection between two 2921 routers in a lab environment, without going through an ISP. I have a HWIC-1DSU-T1= in each of the routers. I have already configured ip addresses to the router interfaces, eDo I need to set any CLOCK RATE or BANDWIDTH commands or anything like that, since my traffic will not actually be going through an ISP during this lab test?
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Mar 15, 2011
I am deploying PBR at the moment in a simple configuration. The 'ip policy' is applied to a sub-interface on a 2811 and all ACLs and route-maps look good. I am using NAT also in this configuration. It is a very simple build, basically stating that all traffic inbound on this sub-interface is to use a next hop of x.x.x.x
My testing is not working, but i need clarity on this. For different reasons, i am not able to tests with hosts on the relevant VLAN yet, as there is not. So i am testing on the local router using the sub-interface as the source IP. i.e. 'ping 8.8.8.8 souce int fa0/0.99' or telnet www.cisco.com 80 source fa0.0.99
Nat appears to be working, but my debug on ip policy is not showing any hits. Will my tests work when i am sourcing packets from the locally connected interface?
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Nov 17, 2011
I have done a bunch of research in trying to re-use an old card/router for testing our new MPLS link. I have a 45m DS3 and was wondering if the PA-MC-T3= card will work UN-channelized. I have tried the "no channelized" command under the controller to no avail. I believe that the card only works for channelized T1's.
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Mar 3, 2011
i want to know more about cable testing color coding
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Apr 23, 2012
I have been in this field for a few years and I found this book, Network Performance Toolkit: Using Open Source Testing Tools, to be very useful. It is full of great open source testing tools and has easy to use instructions for them all.However, to be more specific, I am looking for a packet generator that can simulate network packets over an extended amount of time. So the end result is I have this generator test my physical network for an hour but it simulates a week of real network traffic. Any tool, ideally it be open source?
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Jul 17, 2012
I work for a company that buys used cisco equipment and we are trying to get a basic test center set up. What is the best way to perform basic router testing? We have been trying to come up with something for about 3 weeks and so far all we can do is get in the configuration and play around.
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Apr 19, 2010
Has anyone tested QoS on the new E3000? Whenever I add an application (e.g. Voice Device) and set priority to Medium or High, my upstream bandwidth for everything else is immediately cut significantly, even when I'm not using the priority application.
For example, with QoS disabled, I can consistently get 10Mb upstream (speedtest.comcast.net). As soon as I enable QoS, upstream is capped to exactly 2Mb! On my old router, there was an option to set the total upstream bandwidth -- but on the E3000 there is no such option that I can find.
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Apr 30, 2013
I am looking for the way how to disagle logging of one user. We are using one testing user for checking accesibility of ACS from large number of switches - this checking exhausting logs quite quickly. Is it possible to disable logging of such user?
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Mar 27, 2013
I have a Catalyst 3750 router and would like to know if this can be setup to accept communications from a storage switch which uses a fibre path to then send the signal onwards to some test equipment which uses a copper ethernet connection.
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Jun 22, 2011
I am working at a client site today. The client has a large Frame Relay Hub Spoke network. The Hub is at the HQ location, and then there are about 15 spoke sites in remote offices.
We are having an issue with the frame between the HQ and one of the spokes. We are currently working with our dear friends at AT&T to troubleshoot the issue. AT&T yesterday was trying to run a local loop test to the router at the remote (spoke) end. We were working iwth them in trying to put the remote router (which we manage) into a loopback mode. We were trying to use controller commands
COOP-Rappahanock#conf t
Enter configuration commands, one per line. End with CNTL/Z.
COOP-Rappahanock(config)#controller ?
% Unrecognized command
COOP-Rappahanock(config)#controller
That we seem to run out of options...
How can we put the subinterface that is the other end fo the frame into loopback mode so that a local loop test can be done between us and AT&T (provider)?
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Feb 13, 2013
what is the best open source website load testing tool?
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Mar 13, 2012
I'm looking to test fram relay connections in a lab environment i'm building at home. I have a couple of 2610 routers that are barebones and am looking to get some serial modules. Are (2) WIC-2T's all I would need to create those test connections? Also on a side note are the any modules for the 2610 that have fast ethernet connections. I would like to have that so I can create a router on a stick model off of the 2600's.
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Sep 27, 2012
ASA 5540 8.2 (5)I have tried many combinations of command line syntax suggested in this forum but none are providing success so far.
I want to ping from the Inside Interface across to the Outside Interface and visa versa.I have tried various ACLs as well as "inspect icmp" in the config, etc still no go.
I can ping each interface from the console command line but cannot ping across each interface. [code]
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Jan 3, 2012
From ASA 5520 we tested the interface failover it not working even the interface are getting monitor .
primary is active.
Manually we shut the outside interface of the primary device configuration is getting reflecting in secondary as outside interface shut. Interface failover not happen.
ii All the interface are getting monitor when we gave command sh failover. even though when we shut outside interface failove not happening.
how to do the interface failover in ASA 8.4 version.
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May 29, 2011
I have developing a utility which lets a user do the following :-
1)Identify the internet gateway device / router using uPnP
2)Check for the portmappings present in the gateway
3)Add / remove a port mapping from the gateway device
4)some other functions like loopback interface testing etc
Now , I need a router simulator (or any other way )which supports the following to test my work uPnP+ NAT +can be configured using SOAP XML messages although this is not a requisite as I am using Microsoft's SDK for uPnP ?Host 3 (or may be 4 is the RAM allows) virtual machines , connect them into a subnetwork using this software and then testing for the above requirements .
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Sep 5, 2011
I've got an SG300-10P switch and am trying to use it to create a testing environment for a Fiber Test set. What I would like to do is get two hosts, A & B, plugged into ports 1 and 3 on the switch, to talk to each other, but forcing the traffic to be routed through the two Combo ports 9 & 10. Please see the attached diagram.I've attempted to configure two VLAN's, 10 and 20. Vlan 10 is used for traffic between Ports 1 and 9, Vlan 20 is used for traffic between Ports 3 and 10.I don't really care whether the traffic is tagged or untagged as it passes between ports 9 and 10.
I've tried various combinations of tagged/untagged ports, PVID's, etc. As a first test I've bypassed the Fiber Test set and simply created a direct connection between ports 9 and 10. I am unable to get the traffic from Host A to Host B to get routed through ports 9 and 10 (I ping each host from the other and get no response).
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Mar 14, 2013
I'm currently having issues testing OCSP servers for certificate validation on ACS 5.4. Server team claims everything is fine on their side, but all attempts result in the following error:12562 OCSP server response is invalid
I've already tried to disable NONCE extension support and signature validation, which hasn't really had any effect. How to debug OCSP processing or look into the problem more precisely another way?
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Apr 15, 2013
im new to cisco asa and the model is 5515x with license plus. below is my config at home,
ciscoasa#
ciscoasa# sh run
: Saved
[Code]......
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Jan 18, 2012
I have asked to test an VPN phone for home Users. I have a BT adsl broadband at home which is going into a cisco 2900 switch. Port One is connect to the computer port 3 is connected to the Avaya VPN phone this work's. The quality is not very good, so the question is could I have qos on Port 3 which is connected to the phone?
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Feb 23, 2012
A Network Lab (governmental) did not let our cisco 2960s switches to be imported to the country and said "according to my lab tests, the maximum mac that your switch can learn is about 500 but as cisco says it should be about 8000"
they did not give me their software but i like to test it myself
Is there a software which generates thousands of MAC and inject them into switch to test the real amount shown in show mac count ?
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