IXIA----DUT-----IXIA
| | |
|_______ |________|
DUT has redudant connections to IXIA. Im pumping traffic from IXIA and traffic takes PATH A .. When I shut PATH A, i expect traffic to shift to PATH B within 100ms (example). How do I test this ?
I having a basic query in troubleshooting E1 link , here im facing packet drop in the link and we are testing by providing local loop and remote loop from the CSU/DSU at local point and at remote point . I have tried ping test while the loop is given at local point and remote point ie i have pinged my local serial interface IP address (eg 10.0.0.1 -local & 10.0.0.2 -remote ) in Remote Loop i could see no errors and drops and also the traffic on the interface output and input is the same(eg input rate 1000bps and output rate 1000bps) .My query is that when i am pinging the local interface IP does the icmp packet travels till the loop point and comes to the same interface(like a boomerang) .
ICMP packet
->->->->->->->->->->->->->->->
R1 Local CSU/DSU | Remote CSU/DSU (remote loop given )
O-----------O------------------------------O |--------------------------------------O R2
<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-|
Pinging 98.137.149.56 and had 100% packet loss; this was suggested in another thread. LAN connected at 100 Mbps BUT cannot access Internet! Windows XP HP desktop; Belkin N Router; Optimum Cablevision - Modem Scientic Atlanta "Webstar"
I am using my iPhone to access Internet.
I have a 1841 router connected to an ISP (currently SDSL EFM 10Mbps through an ISP modem, the router and the model are connected with a FastEthernet interface). On another location I have a linux server.There is an ipsec tunnel (3des-sha esp) between the router and the linux server (actually done with a crypto mac).The router has a hierarchical QOS policy on the egress interface.When sending traffic from the network inside the router to the linux host without the ipsec tunnel, everything is working fine and throughput is correct.When sending traffic from the inside network to the linux host internal ip through the ipsec tunnel, some packets are lost and the traffic throughput decrease.When sending traffic through the tunnel in the reverse direction (from the linux host to the internal network), everything is fine.I looked at the QOS statistics and the dropped packets counters don't increase. I looked at the egress/ingress interface statistics and no packets dropped there.I lowered the MTU on the egress interface, but it didn't solve the problem. I played by sending various ping icmp packets size, but even small packets are sometimes lost.I tried to check the router CPU, but it seems relatively fine (<= 10%)I captured the traffic on both side, and I see the packets emitted, and then I can see that some of the esp packets of the corresponding side are not received, so it looks like the cisco router is the culprit. This 1841 router is running: 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(24)T4,How can I troubleshoot where and why those packets are lost?
View 0 Replies View RelatedI am running ping between two Nexus 7018 over WAN link ,and I can see some set pattern of packet drop(7.40 % drop) with MTU size 1500.When I ping between my 6500 VSS pair and same Nexus 7018 over different SP WAN link on diffrent location , I am still getting same kind of packet drop (8% drop) with MTU 1500. Has any one else come across this issue with Nexus?
View 1 Replies View Relatedhere's my setup :
office 1 :
rv042 hw3
ISP:Obtain an IP automatically
office 2 :
rv042 hw3
ISP:PPPoE
VPN tunnel between both rv042, everything's fine but when i try to ssh from office 2 to an office 1's server, my connection drops.
When it drops, i can still ping pc in office 1, this is really strange!if i change the office 2 ISP to another provider (obtain an IP automatically) everything's ok !
i try to use another PPPoE ISP for office 2 and it's doing the same thing!I've also tried other rv042 in both locations with the same setup and it's doing the same thing, so it's not a router issue.
i've tried older firmware and it's doing the same thing, so it's not a firmware issue!
My workstation(10.0.0.250) directly connected to 6509_1 switch. 6509_1 is gateway with ip 10.0.0.5/22. Sometimes routing stop working, but after 3-5 minutes all back to normal.When issue occur i can't ssh to 6509_1, but i connect to second 6509_2 (10.0.0.6) and i can ssh to 6509_1 from it.Then form 6509_1 i try to ping my workstation Wireshark on my workstation show that packet arrive. My workstation reply on it, but switch not accept it.How it possible? As I say after sometime all go back to normal without any changes. [code]
View 2 Replies View RelatedI have an 887VA-w connected at home. I am using ip virtual-reassembly an all interfaces (dialer and all internal VLANs), I am also using CBAC (currently setting up ZBF). The issue I am having is that I keep getting drop packet error messages and the reasons can differ. Below are some of the outputs I recieve: [code] I have done a show ip virtual-reassembly on all the interfaces and the counter is shown as 0.
View 6 Replies View RelatedI am running (cat4500-ENTSERVICES-M), Version 12.2(53)SG2 on the switch. I have a scenario where I have 3 end user equipments connected to a Cisco 4948 L3 switch. At the switch end port 1/46, 1/47, 1/48 are the terminating points for these 3 devices . I have added these three ports to VLAN140 (switch port access vlan140 on the gig interfaces).
The device connected to 1/46 is the one I'm testing some signalling features on. My requirement is to have intermittent packet drop on this interface so that my signalling associations would go down now and then. I'm trying to simulate a real-time network congestion/latency/packet drop in a simple manner.
I do not want to shut/no shut the 1/46 intf to cause this. Some way to achieve intermittent packet drop on this gig1/46 intf ?
In my cisco 3845 router I can see output packet drop in some of the interfaces.I suspect that router is processing packet beyond its mix throughput limit. Moreover when i run show int fax/y switching command I can see packet drop by RP process.
View 11 Replies View RelatedMy network Infrastructure consists of 2 core switches(cisco 3950, 24 port) and 3 access switches (cisco 2960G, 48port). No distribution layer.Both Core switches are connected to the BVI of a VPN router.PVST is running in all switches. The STP results are all good. We have 3 VLAN's in the LAN an IP routing is enables in the core switch. The network diagram is attached.
The issue we are facing is that , we get intermittent packet drops while pinging towards the access switches, and there is always a higher latency towards these assess switches.These issues are present even with no other users using the LAN. But these issues are not present while pinging towards the GW.
I guess, it is because of this, we have issues the accessing file server in the LAN. How do we go ahead with the troubleshooting. Will upgrading the IOS resolve this.The present version details is..
WS-C2960G-48TC-L 12.2(44)SE6 C2960-LANBASEK9-M
I have an Cisco 6500 CS and there is a Cisco Unified Communication Manger Server connected directly to the Core Switch.I tried to change duplex and speed ( fix and auto ) for both sides, but the same problem.
View 9 Replies View RelatedQuestion re: DIR-655; Hardware ver A4; Firmware version 1.32NA
During bandwidth tests to several sites (principally speedtest.net) I get ping times of 10-11 ms, download speeds of 12+ to 17+ mbps but failure on upload tests using my DIR-655.
When I bypass the 655 and test directly with my cable modem, all (including upload) tests work reliably and consistently.
I have swapped the two ethernet cables involved as well as replacing both with new cables but the results are the same (uploads fail with 655 and work without it)
I have seen several postings over the the last year with this same problem but have never seen any comment from D-Link, or a solution from any reader.
Not that it should have any bearing, but I have TA785GE-128M motherboard and am running Windows 7 (patch current) on COMCAST
is this problem acknowledged by D-Link and is there a solution?
I have an old Pentium 3 PC that I want to test out as a home server. I am thinking of using Linux server is but I don't have any ideas how to do it.
View 4 Replies View RelatedI have upgraded my network service from 2M to 6M per month last week. But the network speed is not so satisfactory. I could hardly feeling its upgrading.Is there any trustful and accurate method or tool to test the network speed?
View 4 Replies View Relatedit seems that if i want to get IBM Cognos 10 BI OLAP Developer certification i have to pass COG-635 exam. it is said exampdf has released the latest COG-635 study guides.
View 1 Replies View RelatedI've recently just moved house and we got Virgin Media 50mgs broadband installed with their wireless super hub which is also a Netgear product.However I first noticed up in my room I have weak signal on my wireless devices I have my Dell laptop, xbox 360 and desktop pc with wifi card.I researched this and went out and bought a Netgear wireless extender:
[code]...
Now this does work it gives me excellent signal but it keeps dropping the connection which is extremely frustrating when playing the xbox or on an online game on the pc.I contacted Netgear and all they suggested was updating the firmware
I currently have an issue with the wireless internet at home whilst watching videos, playing online games, completing homework etc... On the computers working over the wireless network there seems to be a randomly occurring drop out of the internet. My home network connection looks to be solid, but the internet drops out for around 5-10 seconds and then comes back.Here is a screenshot from Xirrus the wifi inspector program from the pc in my room connected via the network:[URL]The home network (Munasinghe and family) had a signal of -78 dBm.The second signal, Optus (name of ISP) wifi had a signal of -85 dBm. This signal value often decreases or disappears altogether.
View 1 Replies View RelatedThis is not a problem I would not have noticed save for starting to use Skype. Every 10 to 20 minutes, my internet drops out. This occurs whether my laptop is connected via LAN cable or wirelessly to the router. Skype drops down to one bar, then drops out, and tries repeatedly to redial, sometimes achieving a very scratchy voice call for several seconds before dropping out again. If you redial in 2 minutes, it is fine and achieves medium quality video calls. Whilst skype is floundering around, I can sometimes browse the internet, but sometimes it is offline. I have phoned my ISP and they claim no problems on their end. Beyond that I really don't know where to start on looking for the problem.
View 7 Replies View RelatedAs per CISCO QoS document URL, IOS from 12.2(13)T support drop command in policy map. But our CISCO ASR 1013 having IOS of Version 15.2(1)S1 doesn't have drop syntax.How can we drop specific application using QoS in ASR 1013 of IOS version 15.2 and higher?,Can I allow few users for a particular application (like P2P) and drop other users based on users source IP?
View 2 Replies View RelatedWell while browsing net on my mobile/laptop suddenly the Wifi get disconnected. But the wifi of access point does not drops. Its connected to the router in which wifi drops.Also the net on my desktop connected to the router via ethernet cable, does not go offline. I re,ain connected to net via Desktop even when wifi drops.
View 14 Replies View RelatedWe've had Cisco 1252 APs running on PoE (3750E gives the port 20W of power) for well over 3 years with no problems. These have not been touched, moved or configured since they went in.
All of sudden we're seeing these APs drop off the network and investigations reveal that they show as IEEE PD when you do a show power inline.
Some of these are slated to be replaced after the ports were changed, the cables replaced and port reset (also an old spare 1252 was inserted in to one of these ports and it came up fine, indicating an issue with these APs).
If it was one or two then maybe I could believe that the APs are at fault, but with so many (10 so far) I'm struggling to believe it. Could it be the code we are running on the switches? We are running 12.2(50)SE3.
my Cisco anyconnect VPN clients are able to access all of my internal networks accept to another site which has a IPSEC VPN site-to-site. The Cisco ASA forwards the packets destined to this remote site to a Cisco router which NATS the source addresses (pool 10.17.252.0/24) to a 192.168.46.0 range. The remote network is 155.x.x.x which I have included in my internal subnets object-group and added a route on the ASA to route it inside.
I have configured NAT so that it does not NAT anything from the anyconnect client range to the internal subnets. I am using version 8.3(2) and the NAT rule is:
nat (outside,inside) source static SSLPOOL SSLPOOL destination static INSIDE_NETS INSIDE_NETS
I can still not connect to the remote side via the VPN; when I run this throught packet-tracer, I get a failure on phase 6:
Type: WEBVPN-SVC
Subtype: in
Result: DROP
Result:Drop reason: (acl-drop) Flow is denied by configured rule
I cant seem to work out what it is that is blocking it. The NAT rule above is rule 1 in case some other NAT rule is causing the issue..
i see that the wifi on the SRP Freezes. If i am connected via lan, i can still surf the net or connect to another access point on the network and surf. But the wiress devides connected to the SRP loose connectivity even though it shows that the wifi connection is connected. I am running on the latest firmware. this problem has started occcuring only recently
View 3 Replies View RelatedI had a Linksys Wireless-G router for a long time and had very good luck with it. However, I ended up getting a couple of Wireless-N devices and wanted to get a different router. I bought the Linksys E3000. I got it home and set it up, and at first it worked. Then it would all of a sudden drop everything connected to it. I would restart the router, and in short order it would drop all connections again. This completely baffled me for awhile, until I actually touched the bottom of the router, and it was quite hot. I had it laying flat on a a table, so I could never understand why it was getting so hot. Anyway...I stood it up on it's side and it worked for awhile. Then it would randomly drop various things connected to it. The last straw was when I was listening to internet on the Apple TV, while viewing the internet on my PC and it started dropping the connection every five minutes. Anyway, I have now hooked my Wireless-G Linksys back up and it is working great.
is Wireless-N even needed? I live in a small place, so I don't need it to reach a long distance, and I don't transfer a tremendous amount of date wirelessly, so that doesn't really matter. Should I even try to fix this router? I looked on the Linksys page and I am running the newest firmware.
I've been having problems downloading full ISO's before they're interrupted. There doesn't seem to be any real rhyme or reason to it. Sometimes a 4.1GB ISO will stop at 2GB, other times at 4.0GB. I realize I could run a ping from the time I walk in until the time I leave, but that seems a bit too archaic of a solution.nfortunately, our CTO believes SNMP is too much of a security risk
View 11 Replies View RelatedI know ping and traceroute are commands that test network connectivity. what about netstat and telnet? can they also test network connectivity?
View 4 Replies View RelatedMy Dell Inspiron Win 7 equipped computer cannot connect to the Internet. I have a DSL router that I can wirelessly connect to, but it says no Internet access. I used the manual Intel Wireless Manual Diagnostic Tools to test my system and failed the ping test. Dialog box says "no response, default gateway,DHCP server" and indicates the ping test failed.I have checked my router and it is working nominally; other laptops in my family have Internet access just fine. My Intel Centrino Wireless N 1030 adapter is working fine. I detect no other hardware problems on my laptop.
View 7 Replies View RelatedI did a network test with Passmarks Performancetest. I'm running a 10/100 network with all devices connecting at 100Mb. On Performancetest there are 2 tests to run for Network speed, TCP and UDP. The TCP speed test came back with an average 62000kbps (7.5Mb), and the UDP was 89000kbps (10.8Mb). As I'm running a 100mb network, shouldn't the results of been higher?
View 3 Replies View RelatedTest a destination port if it blocked or not by my ISP
View 8 Replies View RelatedI am currently using Time Warner Cable as my internet provider and I have been experiencing very slow internet connection speeds for the past few weeks. This has happened across multiple laptops and desktops both wireless and wired connections. I have done a ping and tracert test but am unable to read the results.
View 7 Replies View RelatedI have a cable lan connection for internet.i check speedtest.net for the results and it showed.9mbps download speed and .10 mbps upload speed.but when i download something i only get 0.45 mbps speed.Sometimes i get 9mbps but not often.But speedtest.net always shows my speed to be 9mbps.So that makes me guess , that there is actually 9 mbps available.now how do i utilize it.?
View 8 Replies View Relatedi am using mtnl broadband and modem is sam300ax...internet is connet properly..now i want to conect netgear wireless router(wgr61 v9) sothat i can connect internet on another two pcs.i will attach wifi Dlink adptors in another two pcs..i donot how do this? anybody give me step by step process..
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