I am capturing at 2 different locations and I need to find packets that are getting dropped between the 2.
I have done all the merging and everything needed for this in wireshark but because the mac address changes 1/2 way to me all the packets are coming up as lost
is there anyway to remove the MAC address from the captures or as a field it looks at?
Ive just downloaded wireshark just to mess around and ive noticed that even when ive got nothing open its still capturing packets. It gives me a choice of interfaces i want to choose to monitor and i would of thought it be "Realtek PCIe Family Controller" as this is normally the default one (im using wireless) but its saying no packets are being captured from this interface its the "Microsoft" Interface thats capturing the packets. Ive attached a screenshot, i know this isnt nothing bad but was just wondering 1) why isnt my Realtek PCIe interface capturing anything?
View 5 Replies View RelatedIf I look at a site like wikipedia for example ,it has lots of text. If I capture those packets which made up that page using wireshark I cant find that text anywhere no matter what filter I use and even though I turn on ASCII. Is it because text is being rendered unreadable by some kind of compression?
View 7 Replies View RelatedIve just downloaded wireshark just to mess around and ive noticed that even when ive got nothing open its still capturing packets. It gives me a choice of interfaces i want to choose to monitor and i would of thought it be "Realtek PCIe Family Controller" as this is normally the default one (im using wireless) but its saying no packets are being captured from this interface its the "Microsoft" Interface thats capturing the packets. Ive attached a screenshot, i know this isnt nothing bad but was just wondering 1) why isnt my Realtek PCIe interface capturing anything (even when i have youtube open it doesnt capture anything) and 2) why is Microsoft capturing packets? what is this microsoft interface and why is it capturing packets when nothing is open.
View 2 Replies View RelatedWe have two offices connected using Site-to-Site VPN (IPSEC) as shown:(IP ficticius)Office 1 - We had to use 2 routers since we have a range of valid IPs: From a host in office 2 we normally ping 192.168.102.1 (gateway at office 1),But when pinging a host inside office 1 (eg: 192.168.102.8) 50% of packets have been lost.Could it be a hardware problem?
View 1 Replies View Relatedhow to use wireshark to troublesoot network issue i not sure how to use wireshark to troubleshoot.
View 4 Replies View RelatedHow do I set up Wireshark to monitor a local IP? 192.168.0.186 I guess I have to do some kind of settings in the DIR-655?
View 1 Replies View RelatedA network administrator wants to capture some network data. He opens Wireshark software, start capturing, and does the following:In PC-A, runs a command in command prompt. The network admin issues the command and sees there is ping response from the google.
View 3 Replies View RelatedWe are going to be rolling the 4500 switches out and I wanted to know more about how to use the wireshark featue. Any documentation on how to use this?
View 2 Replies View RelatedI have cisco 2651 with one L3 interface ip 172.26.18.200. This Cisco is gateway from E1 PRI (PBX Aastra MX-ONE TSW) to SIP (Asterisk). This cisco 2651 connected to cisco 2950 in port Fa 0/12. Fa 0/12 is in VLAN 518 (dot1q).
On cisco 2950 i made next commands:
# monitor session 1 source interface Fa 0/12 both encap dot1q
# monitor session 1 destination interface Fa 0/9
#sho monitor session 1
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I'm trying to schedule a 90 second capture every 20 minutes to coincide with a process I have running. I have created a batch fun to run tshark.exe with the command to stop after 90 seconds, and an output file (-w). This all works, my challenge is that the next time it runs it overwrites the previous file. Is it possible to make tshark timestamp the filename? or is there something clever someone can recommend with a batch file to copy last version somewhere else and rename, so that I can have the process running constantly.
View 3 Replies View RelatedI do not see 802.1Q tags nor do I see p-bits (COS) in my wireshark captures. My setup is not working and I have no way to verify (sniff) that the 6509 is setting the p-bits to 3. [code]
View 4 Replies View Relatedthis might sound straight forward, but every other pc or console can find and connect to my router.This issue seems to happen about once every few months, sometimes it comes back by itself and reconnects completely fine.
There isn't a "user limit" on our router.Wireless adapter is dell wireless 1505 draft 802.11n wlan mini-card.
Have restarted PC and uninstalled and reinstalled the card.I tried to set the i.p address to static but it says "adapter disconnected" so won't allow me to edit any settings, despite it being able to find neighbour's wireless very easily.
I've no experience in VoIP and been ditched with looking at an IP trunking problem on our network.The users where getting dead lines or silent calls, but it seems after re-seating IP trunking card here and there around the network a few times, all is settled to normal. Unfortunately it's a third party that look after the majority of the telephony, and as they can't figure out why this happens they often say it must be a problem with the data WAN it traverses.So I started trying to figure something out, I have IPSLA monitoring setup in Solarwinds on most of the routers and all looks well from that aspect; MOS is 4.34 and Jitter is only 1ms at worst. I've taken a wireshark packet capture of the IP trunk by mirroring the port on the switch at a main site where I've been told a lot of calls are routed through. Inside wireshark I used the 'telephony> voip calls' tool and decoded all the calls. The output is showing most calls have 'Out of Seq' and 'Wrong Timestamp' at around 25-50%. Although these calls seem fine otherwise, and I took this capture whilst the fault was not occurring. I know I need to capture next time when the fault is occurring, but this is what I have for now.How can i fix this or even start to troubleshoot further?
p.s- each site has two routers running GLBP to the WAN, over two ISP locations. I read something about having consistent routing to avoid packets arriving out of sequence, but haven't found anything yet to say this is how I can/should do that.
We use all Cisco router in our business mostly 1841 and 871. But now i'm currently working with a new router:
Just purchased last week - Cisco 881
The Cisco IOS is:
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.0(1)M6, RELEASE SOFTWARE (fc1)
->System image file is "flash:c880data-universalk9-mz.150-1.M6.bin"
As all our router are Cisco we use EIGRP as our routing protocal. But with this router all I see is:
#router ?
odr On Demand stub Routes
rip Routing Information Protocol (RIP)
Where is my EIGRP ? I can't configure eigrp, so my router wont be doing much routing.
My sent packets are 0 and also received packets. What can I do?
View 3 Replies View RelatedI use a wireless adapter to connect to our home network but its stopped receiving packets but is sending them. It has worked fine for ages now it just randomly stopped. The network works with everything else (laptops, Xbox and iPods) but my pc wont receive anything. Also our home connection has no password as we live in the middle of nowhere.
View 8 Replies View RelatedI am having a really hard time with a computer that has a wireless connection. Specifically the internet keeps going out. The computer info is that of the affected computer and not the host computer to which the router and modem are connected.
View 2 Replies View RelatedHow come my packets sent are so high.
View 3 Replies View RelatedWhy might an ASA flag packets originated from itself as having a spoofed address?
Log messages are ASA-2-106016
I can connect to it fine and access everything behind the VPN. I have a Windows 7 machine 32 bits. He can connect to the VPN just fine but not access anything behind it, he is running Windows 7 64-bits. This is not a new setup, the VPN has been working before. If I debug ISAKMP and IPSEC in the ASA I see nothing out of the ordinary. The only thing I see is that the VPN client on his machine is showing that the counter for discarded packets is increasing. This is Ciscos explanation to discarded packets. "Packets discarded—The total number of data packets that the VPN Client rejected because they did not come from the secure VPN device gateway." So it seems that the client does not believe that the packets are from the ASA. I have no idea why that would be and what could have changed that made a functioning VPN turn into a non functioning one. He can not remember doing any major installs or something like that which could mess with the client. We uninstalled the version he was using and installed a slightly newer version but it made no difference.
View 1 Replies View RelatedAn IP packet of size 1500 bytes passes through two network segments before it reaches its destination. The header size of this packet is 20 bytes. The maximum size of an IP packet in the first intermediate network (its MTU) is 1024 bytes, and that in the second network is 576 bytes.Explain how the IP packet described above would be fragmented into smaller parts in a router, paying particular attention to the flag bits and to the fragment offset field in the header.
- Fragmentation and reassembly needs to break a data-gram into an almost random number of pieces that later can reassembled.
- It uses the identification field to ensure that fragments of different datagrams are not mixed.
- IP packet of 1500 bytes comprises 1480 bytes of data and a 20-byte header.
- In the first intermediate network, the packet size of 1024 bytes allows for 1000 bytes of data plus a 20-byte IP
header.[code]
Is it possible to pass 802.3 packets over a L2TP?If so, how would the tunnel differ from a normal L2TP?
View 1 Replies View RelatedWhile troubleshooting high cpu due to interrupts on platforms like 6500 or 7600 we can capture the packets getting punted to the CPU using netdr or on 4500 I think we can even use monitor session. But is there a way where we can capture/sniff packets reaching the CPU on a 7206vxr with NPE-G2?
View 6 Replies View RelatedI have a NAT setup. Some of my udp packets are dropping. How to find more about the NAT to find whether it missed anything or not. the router is 3945e. [code]
View 3 Replies View RelatedI have a weird issue with a QOS policy that I have implemented. Details are below.
This is basically the policy I have created. It is running on a Cisco 877 router (running Advance IP Services 12.4). The internet connection is an Internode ADSL service.
class-map match-any VOIP
match access-group name VOICE-OUT
!
!
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I have ACE10 Module in my switch core 6509, my context "Proxy" was criated for balance connections to Forefront TMG Servers, this balance needs original client IP Address connections end to end in the solution.
My problem is: The clients are complaining of slowness connection to the internet, i captured the traffic in the ace capture feature and i see some RST packets and severals checksum error packets in pcap file.
The topology is:
Client -> ACE VIP VLAN 81 -> RSERVERS VLAN 80
Vlan 80 is in L2 mode(no interface vlan in the switch core 6509, route occurs through the ace appliance).
The IP address 10.96.200.6 is the gw for rservers.
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I recently moved to another room as I was removing my router I removed some tape unbeknown to me it also removed my MAC Number. Is there anyway I can recover that Mac Number?
View 1 Replies View RelatedI have configured my ASA5520 to act as VPN server. It accepts connections from the internet and then it authenticates the user to a Windows 2008 Server via Radius.Everything works fine if I use the VPN client embedded in Microsoft Windows. Conversely, if I try to configure Cisco VPN Client, I cannot find where to define the PSK string.
View 3 Replies View RelatedI have two 1841 routers running different IOS versions:R1 running 15.0(1)M3 Advanced IP ServicesR2 running 15.1(4)M2 Advanced IP Services R1 supports the encapsulation dot1q second-dot1q on FastEthernet subinterfaces. Surprisingly, R2 with the newer IOS (of the same feature set) does not have the second-dot1q command option. I've done my Feature Navigator homework but I did not see any significant differences between these two IOS versions that would explain why the second-dot1q command is not available on R2. Am I missing something? Has the syntax changed, or a different feature set is needed for 15.1M and higher to get the second-dot1q command back?
View 2 Replies View RelatedI am trying to run the following commands on a 2801 router, but the commands are missing:
mls qos
mls qos map cos-dscp 0 8 16 40 32 46 48 56
The only QoS command i have in global config is (no MLS qos) :
REMOTE-ROUTER1(config)#qos ?
restore-show-output Restore old show output
shape-timer Set the HQF shape timer interval
The router is running IOS:
System image file is "flash:c2801-ipbasek9-mz.151-4.M5.bin"
Am i just running the incorrect IOS or am i missing somehting, i need to change the QoS Map for my Nortel VoIP. The VoIP phones connect to a 3750 PoE which used to conenct to a 2651XM to route VoIP and data traffic over the same copper pairs (WAN link to hub site) hence the need for a Service policy but being Nortel phones, require changing the cos-dscp map. the 2801 is going to replace the 2651XM using a new HWIC.
I just got a new WIsm2 to work and I'm missing the second controller on a 6500 the session slot 12 processor 1 comand brings me to the logon screen. but session slot 12 processor 2 ends with an Error, Am I right that the new wism2 has/is only one controller other than the 'old' wism which has processor 1 and 2 ?
View 4 Replies View Relatedtoday I received a Cisco Router 881G with PCEX-3G-HSPA-G for a customer that ordered a Router with the feature to send/receive SMS and to remotely active the 3G Internet connection through SMS. I believe that the router that meets this requirement is the Router 881G that I received today. In particular, the model is:
CISCO881G-K9
Now, I installed the router and configured the 3G link that is working properly BUT all the commands related to the SMS are completely missing. In particular, I miss the command:
cellular gsm sms send
gsm sms archive path
In the following documentation I see that these commands should be available: [URL]The fact that these commands are missing sounds very strange to me since the documentation is pretty clear. Do I need to activate any license? I also upgraded tha router to the last version...
Here it is the show version of the Router:
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.2(3)T, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Sat 24-Mar-12 00:00 by prod_rel_team
ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)
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