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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40 views

How to monitor vlan using SMNP?

I am a newbie to building a monitor system using Prometheus and SNMP exporter, I have succeeded get metric from the physical interface, but I want to monitor VLAN on a trunk port, is that possible ? ...
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1answer
38 views

Can you gather only a summary of network traffic via Wireshark (or similar)?

Something on my network is using an enormous amount of data and I need to track it down. Its not constant or predictable. I have had a go with Wireshark and I am sure that it could tell me what I ...
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1answer
36 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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1answer
61 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
145 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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1answer
64 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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0answers
43 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
64 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 ...
5
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1answer
206 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 ...
5
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0answers
185 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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0answers
294 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 ...
3
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1answer
2k 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
202 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
533 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
89 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 ...
2
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1answer
197 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
38 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 ...
2
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2answers
741 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 ...
2
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1answer
1k 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.
1
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1answer
79 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
173 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 ...
8
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1answer
6k 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.
5
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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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0answers
426 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 ...