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Access a pc web service with different ip/mask in on-site network

I tried to get a setup working to make the following scenario work: Access a pc web service hosted in a different IP range/mask than the rest on-site PCs. Details: We have a network setup with a ...
0
votes
3answers
57 views

Connecting 2 buildings on same site via fiber

If I have 2 buildings on the same site, connected to each other via a fiber connection and they both run to the same ISP, would both buildings need to be connected to a firewall? For the main ...
0
votes
2answers
51 views

How can I connect (stack) two Cisco SG350 together?

I am building a storage network, physically separated from the data network. I have two Cisco SG350-28P-K9 V02 switches: One on the basement. Has two NAS, two ESX servers. (in use) One on the 4th ...
1
vote
1answer
36 views

Arpping responding with Cisco ASA interface mac address and mac address of machine

For some reason our Cisco is responding to arp requests between machines on the same switch. It's not breaking anything but it is slowing initial connections. I've been making a lot of changes on the ...
0
votes
1answer
35 views

how can we route two routers on one switch in a different network ip

I am trying to connect two routers in one switch to ping each other using IP route . router 0 has 192.168.10.1/24 gi0/0 router 1 has 192.168.20.1/24 gi0/0 I tried putting switch-port trunks on both ...
0
votes
0answers
92 views

why iperf3 UDP throughput is lower than the TCP throughput?

I'm running an iperf3 throughput test from my PC to another one, going through a router. I've tried the same configuration for TCP traffic and for UDP traffic. However, for UDP traffic, I get worse ...
0
votes
0answers
18 views

The huawei S2300's interface protocol become `--`

The huawei S2300's interface protocol become --: <HW>dis interface brief *down: administratively down ...
1
vote
2answers
50 views

Not a four-way handshake in Cisco Packet Tracer?

TCP connection termination is performed by the four-way handshake, as shown below (the image is taken from here). I tried to verify it on Cisco Packet Tracer. With the following topology, I captured ...
0
votes
0answers
33 views

Applying DSCP to an interface

I'm trying to apply DSCP (AF41) to an interface eth-trunk (if it matters) - [~HUAWEI] diffserv domain QoS \ creating diffserv domain named QoS [~HUAWEI] dsdomain QoS] ip-dscp-outbound af4 ...
0
votes
1answer
48 views

Cisco 3750: SNMP

On my Cisco 3750G, i have SNMPV3 enabled, this is working perfectly with Zabbix. I would like to separate production flows from supervision flows, Do you know if it's possible to enable SNMP ...
0
votes
1answer
24 views

Is it possible to query interface statistics bytes by given start time to end time in Juniper Device?

I can query a interface detail: admin@Juniper-EX# run show interfaces ge-0/0/1 detail Physical interface: ge-0/0/1, Enabled, Physical link is Down Interface index: 131, SNMP ifIndex: 504, ...
0
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0answers
20 views

CISCO Packet Tracer

Does Cisco Packet Tracer support config memory and config network command? If no, then do enterprise routers still support it?
0
votes
1answer
92 views

How does NAT ensure that every machine has a unique public IP?

I am trying to understand the distinction between public and private IP addresses in IPv4 networking. The picture I've been told has some problems with it, so I would like to present it here and ask ...
0
votes
0answers
11 views

How use the remaining adresses in this case? [duplicate]

I have this adress 201.217.5.0/24 and I made subnetting for a network of 5 servers so I use the adress /29 for that and I don't know if the remaining 248 adresses I can separate into /30 networks (...
0
votes
2answers
78 views

How BGP guarantees same route for a forwarded packet?

In BGP all routers choose the best route to a single destination. So for Router A and destination D, A will forward the packet to the next-hop router (let us say router R) after knowing the best route ...
0
votes
0answers
25 views

Dual FlexVPNs with VRFs on a single router

I'm trying to achieve a double wrapped VPN using a single router at both ends. (Tin foiled hat customer) My current chain of thought is HUB |global routing table >Internal VPN> VRF BLACK > ...
0
votes
1answer
43 views

AP won't join WLC

I have a lightweight AP AIR-AP3802I-E-K9 that I'm trying to connect to my WLC, but it just won't. When I run a debug on the WLC, I can see the Join request from my AP, and I can see my WLC sending a ...
1
vote
0answers
14 views

Some client can not able to get IP address [closed]

I get a new ASUS Router I have configured it as wireless router mode with IP address: 192.168.1.253 and disabled its DHCP server because there is a DHCP server with address: 192.168.1.1. Now some ...
-1
votes
1answer
36 views

How does a router settings page work? [closed]

When we enter the routers address 192.168.x.x into our browser we get a page containing the setting for the router. How does this page work ? Is the page stored in the router ?
1
vote
4answers
89 views

Why ICMP Destination Port Unreachable error messeage is generated for unreliable UDP packets?

My doubt is why an icmp destination port unreachable error message generated for udp. Why we can't simply discard the udp packet if the destination port is not reachable by saying udp is connection-...
0
votes
1answer
37 views

Suitable Laptops

Not sure if this topic or question has been asked before but if I was to buy a 2019 top spec macbook pro, would instill be able to connect to Cisco devices, I'll be running windows on it as well but ...
0
votes
2answers
38 views

How to connect to the console router with limited length of roll-over cable?

Here is the full question: I have a roll-over cable with length only 5 m and I want to connect it to the console of the cisco router that is 20 m far. How can I solve this?
1
vote
3answers
63 views

How to exclude interfaces without description on 'sh int description' command using regex?

[Cisco IOS-XE] [4507R+E] How to exclude interfaces without description on 'sh int description' command using regex? Couldn't find any related/previous questions.
0
votes
1answer
12 views

IP-Sec VPN Tunnel Established Between 2 Remote Machines. Why Can't Machines In Their Subnets Connect Across? [closed]

Have 2 Remote Ubuntu Machines in different subnets. one: 192.168.1.0/24 Two: 192.168.2.0/24 Established VPN tunnel between 2 machines, 1 in each subnet. Their IPs: Public IPs 1.1.1.1 2.2.2.2 ...
0
votes
1answer
42 views

UDP in wifi getting excessively buffered

We are using a wifi-enabled device that receives a stream of UDP packets (30 per second). It is very important for us to receive these messages without lag, that's why we are using UDP and not TCP ...
16
votes
4answers
4k views

Why is 10.1.255.255 an invalid broadcast address?

I’ve been following the CCENT official certification book(100-105) and came upon this question in the “do I know this already?” quiz. The books only covered /24 subnetting only so far. Which of the ...
0
votes
1answer
39 views

Can communication to broadcast 224.0.0.1 be made to reach hosts outside of the local subnet?

I been asked the question if it is possible for an a IP host to use multicast to address 224.0.0.1 in order to reach (and get a response from) another host which is not on the local network segment ...
0
votes
1answer
28 views

Jumbo frame problem when using switch

I have two GigE cameras. I use 4 frame per second for capturing. Each frame of first camera is 2.3MB. Each frame of second camera is 1.8MB. So in a second I use 4 * 4.1 = 16.4 MB = 131 Mb of bandwidth....
0
votes
0answers
32 views

Can you use the first and last subnet in IPv4? [duplicate]

I know you can't use the first and last address -in- a subnet. (I.E. 192.168.1.0 or 192.168.1.255) but there is some amount of disagreement in my Networking 1 class whether or not you can use the ...
0
votes
2answers
37 views

How To Route Private Subnet Traffic To Internet Via Public Subnet In The Same AWS VPC?

This scenario is simple, created a VPC (CIDR > 172.16.0.0/16) in AWS Management Console, created 2 subnets in it. Public (CIDR > 172.16.1.0/24) Private (CIDR > 172.16.2.0/24) Public route is set on ...
0
votes
1answer
44 views

Is this device a network hub? [closed]

Due to the space limitation of the conduit, I ran a single cable from the switch to my room, and intended to run 2 separate fast Ethernet lines on it (4 wires each). I bought this thing from China for ...
0
votes
0answers
18 views

why we need to make the size of our burst 2 times the product of bandwidth and delay?

I'm new to Networking and I'm reading a textbook which says: The bandwidth-delay product defines the number of bits that can fill the link. This measurement is important if we need to send data in ...
0
votes
2answers
42 views

Cisco ASA IKE Receiver: Runt ISAKMP packet discarded on Port 500

I have lots of ikev1 tunnel running on our production Cisco ASA5585 and today i have configured ikev2 tunnel for one of our new customer and i have started seeing following error, and not sure what is ...
0
votes
0answers
21 views

IKE Main Mode - Dynamic peers

So i searched for some time now, read the https://tools.ietf.org/html/rfc2409RFC and simply couldn't find an answer to why Main Mode needs static adresses. The RFC states Aggressive Mode does not ...
0
votes
0answers
12 views

Cisco ASA Security Warning: Untrusted server cert after asa crash and reload

We have Cisco ASA 5505 working VPN anyconnect and it's been almost 1 year no issue, but last week it got crashed and reboot itself and after that we found it started throwing warning like following: ...
0
votes
1answer
35 views

152 bit hardware address in dhcp binding?

When listing MAC addresses on a Cisco ISR DHCP service, I get a long list of hardware addresses, one per IP address, but for one IP I get an address so long it runs onto three lines. The other ...
0
votes
1answer
24 views

STP Priority field and 4 bits in multiples of 4096

For the STP Priority Field, how do you get "multiples of 4096" out of 4 bits?
1
vote
1answer
37 views

what are Hardware size and protocol size in ARP header? Attached image

While working on packet capture for a simple scan, just had a look at packet capture and want to know what does hardware size and protocol size means in a ARP header?
2
votes
2answers
61 views

Troubleshooting connectivity in BGP/Quagga/Docker lab

I have created a virtual networking lab to test BGP routing. The lab is made up of two Debian Docker images which serve as end users and two images running Alpine Linux with Quagga to serve as the ...
0
votes
1answer
40 views

How to create a routing loop? [closed]

Let's say I have two or three routers and I want the packets sent between them NOT to reach their destination but to "loop" between the routers until TTL runs out." I need to do this in a network ...
0
votes
1answer
67 views

Junos, accidentally deleted a FIB entry, how to re-add?

while i was testing Junos in a virtual environment, i accidentally deleted an entry in the forwarding base (do not clearly remember which command i used to let that happen), but because of this the ...
0
votes
0answers
20 views

How Actually OSI model works?? I have numerous doubts in that which i mentioned below. Can anyone address those questions in simple way? [duplicate]

Acc. to my understanding i have few doubts first comes..sender like me who opens IE or Chrome to access a website then i write https://example.com Here i am using internet service using some ...
0
votes
2answers
30 views

Traceroute command last hop cannot be reached

By running the traceroute command below I obtained this output: traceroute www.google.com -q 3 -m 60 traceroute to www.google.com (172.217.169.36), 60 hops max, 60 byte packets 1 gateway (10.81.62....
0
votes
1answer
41 views

How is port 80 associated with application port?

I'm new to networking, just a question on port numbers. We know that port 80 is for HTTP. But if I want to access a web application whose web server handles http requests, normally I type below url ...
0
votes
1answer
27 views

When IP header of length 22bytes is there then how padding will work?

My base IPv4 header of 20bytes + 2bytes i used for Options making it 22bytes means 176bits so padding will add 16 Zeroes to make it multiple of 32? is this correct way to understand? Boundary of ...
0
votes
1answer
32 views

Functionality differences between an Wireless Access Point and a Switch?

I have a WAP connected to a switch via a twisted pair cable. Aside from the communication medium to other nodes (electrical signal vs radio waves), do they operate the same way? Specifically: When ...
-1
votes
1answer
26 views

Patch Panel/Wiring Question

The reason I am asking this is because I am an amateur, so if it is obvious to you, it's not to me, so please explain. I saw this picture and I panicked a little bit, First of all I know older patch ...
0
votes
2answers
97 views

what is difference between MSS and Window Size?

What is actual difference b/w these two? 1) I have gone through many tutorials on Youtube where some have told that Window Size is what total packet size it can receive eg Window Size is 15000 bytes ...
2
votes
0answers
25 views

First fresnel zone and Epstein-Peterson approach

Let's say we have the following wireless communication system with obstacles located as drawn in this picture Solving this using Bullington method is straight-forward, only obstacles that fall into ...
0
votes
1answer
22 views

Question On Route Aggregation [duplicate]

Suppose I have these 3 IP Prefixes : 190.154.27.0/26 190.154.27.64/26 190.154.27.192/26 and I want find the aggregate prefix. I convert each address to its' binary equivalent: 10111110....

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