All Questions

0
votes
0answers
6 views

HP Core Switches and Access switches giving packet losses in network [on hold]

let me put it simple just tell me if i upgrade the firmware version of access switches and core switch, can this action decrease latency being experienced in the networks
0
votes
1answer
11 views

how p2p connections are established over the internet [on hold]

it's being said that a peer to peer network is not server-base for routing and processing data and only uses server for getting the up to date nodes addresses (probably their internet IP address) to ...
0
votes
0answers
12 views

Is it right to choose ALOHA and not Bit-Map in this case? [on hold]

i am revisiting key subjects and would appreciate your opinion. in a network with 8 broadcasting station (0-7), with a contending time of t seconds and each each broadcasting frame lasts 20t. is ...
0
votes
0answers
6 views

Port forwarding to single device from multiple gateways not working [on hold]

I have a networking setup with consisting of 2 network routers associated with 2 different internet connections from 2 ISPs. These 2 routers are in the same subnet in the same network. I am trying to ...
0
votes
1answer
11 views

How do devices with static IP behave themselves when plugged to a new network? [on hold]

I'm trying to understand how to determine if a device plugged to my PC with Ethernet cable has a static IP. What I'm trying to do is to sniff DHCP packets that it sends and by looking at DHCPDISCOVER ...
1
vote
1answer
14 views

ipv6 dhcp pool option link-address

I'm learning to set up an ipv6 dhcp pool in Packet Tracer. And I'm stomped on what a link-address is as an option in a dhcp server ipv6. I've read this https://www.cisco.com/c/en/us/td/docs/ios-xml/...
0
votes
1answer
13 views

Can anyone Explain me difference Between PSH and URG flag in TCP segment

According to me when PSH flag is set , it indicates that data will have to be sent immediately to the wire and on receiving side the data has to be pushed to the application immediately . When URG ...
0
votes
0answers
9 views

What actually is EIFS?

There are a couple of things on the Internet about EIFS intervals. One way I've found to help people understand EIFS is the following: When a station receives a corrupted frame, it has no way of ...
0
votes
0answers
9 views

Why is there no contention window after a DIFS interval on the first transmission in diagrams?

Why, at the start of every diagram representing DCF is there no contention window and it just senses the channel for DIFS before sending RTS? Every other station that has waited for NAV must sense for ...
-1
votes
0answers
9 views

Two million packets [on hold]

What could cause two million packets in and two million packets out as shown by Activity Monitor, as well as "507 Insufficient Storage nginx" message on an iMac?
0
votes
0answers
13 views

Troubles with recursive DNS using bind9 [on hold]

its my first question so sorry for whats about to become. Im working setting up a dns server for my lan, that may use a given iterative root server to resolve others lans domains. Ive configured it ...
0
votes
0answers
7 views

What is bi-directional uri routing? [on hold]

I came across this term on an old Unmaintained repo, but I can't understand what it means.I have written simple web servers with multiple routes but I bi or unidirectional never crossed my mind.I don'...
1
vote
2answers
26 views

What happens when DHCP client and server are on different VLANs

I'm trying to create a lab on PT and I've attached an image. But for some reason my PC is not able to get an IP address from the DHCP server. There is no issues with layer 1 and layer 2. I checked ...
-3
votes
0answers
16 views

Network Problem [on hold]

Hello, Please I have another question; Host A cannot access the company network(please see figure attached), I need to know the possible cause and I will be thankful if you can provide me with a ...
-2
votes
0answers
28 views

Two LANs cannot communicate [on hold]

Hello, Please can anyone tell me why computers on LAN1 cannot communicate with computers on LAN2 ?? Please i will be thankful if you can provide me with a solution. Thank you, Roger Nehme
0
votes
0answers
25 views

DHCP failed. A PIPA is being used [on hold]

In my example_3 the dhcp is working, but when in include 2 routers ( one active and one stanbdy ) in example_2 the DHCP is not working, Can you help me ? Thanks in advance pkt file with example_3 ...
0
votes
1answer
31 views

How to send traffic destined for public internet over network VPN without full tunnel [on hold]

We are running some of our networked equipment on a network controlled by another organization. Our equipment needs to be able to access some internal resources hosted on our private network in AWS. ...
0
votes
0answers
17 views

What types of communication cables can pass through electrical conduit? [on hold]

What types of communication cables can pass through electrical conduit? I believe that optical fiber is the only one possible. However, I'm not sure. I'm trying to make a home project where I have ...
0
votes
0answers
14 views

Setting up Guest WiFi on a Sonicwall TZ 215 plus Sonicpoint NDRs using a VLAN [on hold]

I have a Sonicwall TZ 215 with a number of SOnicPoint NDRs providing WiFi. Our initial setup has been with just directly provisioning and configuring the SonicPoints as access points. We now want to ...
0
votes
0answers
7 views

Transport package through tunnel from gateway to Server without changing source ip [on hold]

I have following Challenge: I have a dynamic IP (changes nearly every day) and want to have a static one. I need that static IP for some services and can't use dyndns or something on dns level. ...
0
votes
0answers
14 views

Dhcp relay on backbone [on hold]

I'm configuring a backbone. I have a dhcp server and i need to use dhcp relay. Do i write the relay's ip adress under the vlan or the interface vlan? Is there a difference between these two situations(...
-1
votes
0answers
13 views

Network ID(Name) in subnetting? [duplicate]

So when we wanna subnet the network of 8 hosts we will say for 8 different addresses we need 8+1(wasted broadcast address)=9 and there is this many different 2^4=16 states we have which needs 4 bits! ...
-1
votes
0answers
11 views

VLSM HW Question [duplicate]

--- PROMPT --- Assign network addresses to each of 6 subnets, with the following constraints. All addresses must be allocated from 214.97.254/23; subnet A should have enough addresses to support 250 ...
2
votes
1answer
16 views

Capture filter for vlan tagged packets and non vlan tagged packets of specific ethertype

I am trying to capture traffic of ethertype 0x88b8. Some of them may be vlan tagged and some of them might not be, but the and and or operators are not behaving in the way I expect. My first attempt ...
0
votes
1answer
28 views

EX3300 can not use irb.x, so how to access the layer-3 address?

EX3300 can not use irb.x, I have a Juniper EX4300 convergence layer Switch, in it there are irb interfaces. such as irb.3, and if I have another EX4300 for access layer, I can set vlan l3-interface ...
0
votes
0answers
35 views

I can not login to Juniper EX4300

I my heap-up EX4300 Switch, I set the system login user admin, and a plain-text password, this is my configuration: {master:0}[edit system] ...
-1
votes
0answers
14 views

WIFI PRIVACY USING A FRIENDS WIFI [on hold]

isTHERE AWAY I CAN PROTECT My Accounts and phone info on an andriod if I'm using a nieghbors wifi network like Keep my accounts from syncing to there wifi connected stuff
0
votes
1answer
41 views

Duplex Mismatch Detection

I'm trying to create a lab on PT to learn about duplex mismatch. I made one end of Fast Ethernet half duplex and other end is full duplex. I was hoping to see an increment in late collisions which I ...
1
vote
0answers
56 views

Strange flooding during installing new switch in network

This is very strange issue i am noticing. In our datacenter we have every switch in rack has cisco vPC configured in short whole datacenter running vPC so there is no loop for spanning-tree anywhere ...
-1
votes
0answers
28 views

what are some Organization that got hacked because of WEP protocol? [on hold]

I wanted to do some research on WEP protocol and i wanted to know some organizations that were hacked just because of this vulnerability.
0
votes
0answers
18 views

Analyze VoIP calls [on hold]

I have some topologies in GNS3 with VoIP configuration and i want to analyze voip parameters like MOS, jitter, packet loss, delays etc. Can you tell me some open source tools that do that?
0
votes
0answers
24 views

Setting up a VPN behind a NAT [on hold]

I need to set up a VPN behind a router used as NAT Box (Cisco 2900 series), who's also behind a NAT box (my ISP). I read online that I had to make a "port forwarding" on my NAT Box. The thing is that ...
0
votes
0answers
88 views

Acknowledgment number (Go back n) vs Sequence number (Selective repeat) [on hold]

An acknowledgment number in the Go-Back-N protocol defines the next packet expected, but an acknowledgment number in the Selective-Repeat protocol defines the sequence number of the packet to be ...
0
votes
1answer
46 views

Map of WAN cables in general [on hold]

Whenever i search for the physical location and path of WAN connectivity, i only find submarine cables, and a site that seems like a paid service. Is there no free map where i can e.g. show the route ...
0
votes
0answers
31 views

The Juniper EX4300 and HUAWEI 5720 trunk do not transit

I use my Juniper EX4300 connect to my HUAWEI 5720 Switch(10.10.11.80), this is my Juniper switch's settings: usage information: set interfaces ae103 unit0 family ethernet-switching interface-mode ...
0
votes
0answers
27 views

Subnetting - IP Address Classes [duplicate]

I've been trying to get my head around subnetting but seems to be getting confusing with the classes and IP ranges within that class. Example: IP Decimal:10.2.225.234/22 IP Binary:00001010 00000010 ...
1
vote
2answers
41 views

Cisco WLC: Displaying AP configuration commands

Is there a way to display on a WLC a list of commands used for configuration of a given AP? I believe it's possible on Juniper Trapeze WLCs, wouldn't understand why Cisco would disable such an option. ...
1
vote
2answers
50 views

Going from 100BaseTX to 1000BaseT

How can this happen? Cables are the same (cat 5) so what needs to be done in order to go from 100Mbps to 1000Mbps?
2
votes
0answers
21 views

Juniper QinQ same port for customer as provider

Is it possible to use a single interface as both the provider port and the customer port for a QinQ setup on a Juniper EX 4200 switch? I have a set of switches "on a stick" attached to the network. ...
0
votes
0answers
15 views

How to get the content of localdirectory from web browser [on hold]

I'm trying to fetch the xml data from the following link of a CISCO phone (7945G or others) connected to CCM, http://x.x.x.x:80/localdirectory via Web Browser When I visit the link on the browser ...
0
votes
0answers
22 views

Database of obsolete/unsupported features/commands? [on hold]

I am currently deploying 20+ C9200L switches for my company. The purpose is to replace the existing infrastructure which consists of a hodge-podge of different switches purchased at separate times and ...
2
votes
1answer
26 views

Collision detection on 100Base-T4

Access methods are used when computers share a common medium 100Base-T4 is star based Why "the fourth pair is used for collision detection"?,when talking about the 100Base-T4 standard?
0
votes
0answers
21 views

Simulate IP phone [on hold]

Sorry if I'm not in the correct forum. We're getting IP phones soon, and I have my router and switches configured correctly with VLANs. I asked the IP phone vendor if they could send me a sample ...
0
votes
0answers
46 views

NAT pooling issues [on hold]

Can someone explain me why the book states: "two private-network hosts cannot access the same external server program (e.g. HTTP or TELNET) at the same time"? I think it is possible to identify ...
0
votes
0answers
17 views

Connect and cable management best practices [on hold]

I does not know if this belong here but what is the best practice about connecting devices beetween them in a datacenter ? I mean, when you want to connect two devices located in the same room : The ...
0
votes
1answer
13 views

Permit only WEB server in ACL on router? [on hold]

In that topology I need to configure 192.168.1.0/24 will block 10.10.20.20 host 192.168.2.0/24 will block 10.10.10.0/24 network All users can view web page but can't ping etc ... I done that top 2 ...
2
votes
1answer
33 views

Running iBGP without IGP

Given following setup: Configuration of the routers is very straight forward. Router BGP1: interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface Loopback9 ip address 9.9.9.9 255.255....
2
votes
1answer
41 views

Duplex mismatch between a Fast Ethernet router and Gigabit Ethernet switch with auto negotiation

i am connecting c3745 router on fast ethernet 0/0 interface with a IOSvL2 switch on gigabit ethernet 0/1 on GNS3. i have set the negotiation on the switch to auto for all interfaces on the switch. ...
1
vote
0answers
13 views

Port Security and IP phones [on hold]

I work in a pretty big hotel and was tasked with finding out the best solution for port security on our IP phones. Currently some employees use the port on the back of the phone to gain internet ...
2
votes
1answer
15 views

Understandable/Implementable explanation of CSMA p - persistent

I have been trying to understand how the CSMA P-persistent method works, but haven't been able to understand how it's implemented. I have referred to a few textbooks and other sources, but all of them ...

15 30 50 per page