Questions tagged [traffic]

For questions about network traffic (or data traffic), where it is the amount of data moving across a network at a given point of time. Only use this tag in relation to on-topic network devices.

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21 views

How should I go on to map URLs entered in a browser, to the IP address of their servers? For example www.xyz.com to 212.212.212.333? [closed]

I can think of three approaches : Build/use a chrome/firefox extension. Use some kinde of packet sniffer (wireshark).( to check out DNS requests/responses). All I need is a file containing the urls ...
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1answer
28 views

Border links vs backbone links

While reading an article about a traffic classification I came across these two terms, which were unfortunately not explained. It was just said that border links are more suitable for the host ...
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14 views

Forward traffic between 2 network interfaces in one Laptop [closed]

I have an ethernet module (a sensor but communicating via ethernet: TCP/IP) connecting to my laptop (x1 carbon). An android device (Pixel XL) in USB tethering mode connecting to my Laptop. IP of ...
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1answer
41 views

Why I cannot see packet loss on GRE over capacity tunnels?

I have the following topology set on AWS where there are 4 CSR 1000v Routers deployed and Segment Routing enabled in which the Segment Routing Headend is R1 and the destination is R3. I aim to send ...
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1answer
60 views

why doesn't WireShark show any traffic from invalid certificate https site? [closed]

i have tried mobile apps like HttpCanary and pc programs like wireshark still got nothing from the site !!
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1answer
103 views

Understanding Throughput of interfaces problem on Cisco Routers

I have the following topology set on AWS where there are 4 CSR 1000v Routers deployed and Segment Routing enabled in which the Segment Routing Headend is R1 and the destination is R3. I aim to send ...
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0answers
32 views

CISCO Meraki - Endpoint API: Get Network Traffic 'sent' and 'received' values

I'm currently developing a Python script with API endpoints, specifically get_network_traffic. My only question is what unit of measure is being used for the returned 'sent' and 'received' values, KB?,...
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2answers
54 views

Monitoring URL requests on foundation's LAN

We are having a internet cafe with guests walking in and out. We would like to keep an eye on browsing traffic on LAN 192.168.2.0/24, because we don't want guests to visit wrong websites. In such ...
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19 views

Can QoS provide a benefit after data has gone through other unmanaged switches first? [duplicate]

Details about the devices We have a 24 port NETGEAR managed POE switch that has QoS capabilities. We have the following unmanaged switches, 24 port Cisco POE, 48 port Cisco, 48 port NETGEAR, and 24 ...
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28 views

What do the multiple occurencies mean in a packet trace file?

I have a trace file and I used tshark to find out the number of duplicate ACKs, with the following command: tshark -r file.pcap -T fields -e frame.number -e tcp.analysis.duplicate_ack After some ...
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129 views

Where is the traffic going?

Here is a routing puzzle: I'm working on a poorly documented network, and I'm trying to document things as I discover them. R1 is a core L3 switch. R2 is a router. The FW is a, well, firewall. On ...
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1answer
128 views

Analyze Network Traffic by Autonomous System Number?

I'm looking for the way to take an estimate consumptions toward internet per Autonomous System Number which could help me to make a decision if it's necessary to establish a peering with this AS's ...
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228 views

AWS tunnel TCP retransmissions and DUP ACKs

I have a IPsec tunnel from my firewall towards AWS, the tunnel is up in both phases. If I run traffic sniffer in the firewall, I can see interesting traffic going through, but there are MANY TCP ...
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1answer
1k views

Difference between junos-host zone and a security zone

As far as security zones are concerned, we apply policies to it to control the transit traffic. And we also apply host-inbound-traffic to a zone or interfaces. If we have both of the above ...
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1answer
145 views

Traffic of idle OpenVPN connection [closed]

I have a mobile gateway connected to my VPN via OpenVPN and a 2G connection. Now I observe some unexpected traffic (~20MB / day) and wonder where it comes from. While I'm connected to the gateway I ...
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2answers
375 views

Fortigate 60D - WAN Link Traffic Division

Requirement is to divide the WAN zone traffic Two different LAN IP group's internet traffic should go though 2 different WAN connections in fortigate 60D (Currently its WAN Zone(wan1 and wan2) . How ...
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1answer
65 views

What is the general Traffic Flow of 2 Clients connected to the same AP?

If Client A and Client B are both connected to Access Point C and A + B want to talk to each other, does C act as a switch between the two of these clients or does C have to send that traffic back to ...
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1answer
176 views

IPoIB with Netem (Latency emulation) Poor performance

I have to emulate a wide area network. My setup contains two servers with MT27500 Family [ConnectX-3] Infiniband cards. Default latency between both nodes is ~0.4ms and iperf test shows throughput of ...
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0answers
34 views

Policy Map issue on c6848x 15.2(02)SY

I have a problem creating traffic shaping on c6848x. I need to set shaping on output interface to limit and shape traffic to 100 MBs. So far I did this: class-map match-any 100MB-OUT match any ...
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2answers
568 views

ASA cannot ping outside through NAT on border router

I have the following topology below, in GNS3. Basically, the cloud NAT-1 is the Internet, R1 is my border router with NAT and FWASAv-1 was supposed to be able to access the Internet, but can't. I ...
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1answer
989 views

Generating traffic with DF flag set [closed]

is there a tool which I could generate TCP traffic with the Don't Fragment flag set? I used iperf, but I cannot find an option for DF.
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1answer
66 views

Log incoming traffic

Is there any way to somehow log all incoming messages for Network devices, like who pinged my switch or who is trying to connect to my switch and what protocol was used? Is it possible to do it with ...
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1answer
154 views

Generating realistic Internet traffic in NS-3

I want to simulate a network in NS-3 and i want the traffic on this network be the real traffic. I found this article. This tool is based on PPBP (PPBP models on internet traffic) but i am really ...
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1answer
4k views

How `UDP Hole Punching` Works?

Can anyone explain how UDP hole punching works in a simple way? I know how NAT and PAT works, but can't get a clear idea about UDP hole punching.
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2answers
2k views

Cisco ISR 4000 Performance Levels, router shaper

I am trying to understand Cisco ISR 4000 Performance Levels. In the document ISR 4000, one can read the following paragraph: It's actually quite simple. The router shaper applies only to traffic ...
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379 views

Traffic Statistics per VLAN

I'm using Huawei s6720 and I would like to monitor traffic per vlan, example: # Interface GigabitEthernet0/0/6 port link-type trunk port trunk allow-pass vlan 200 300 400 500 # I can verify ...