Networking

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Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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I currently have four locations connected over an MPLS.  I recently replaced both DCs a the corporate office with two 2019 servers.  Since the change computers at each location are no longer able to see any other workstations/servers on the network.  I have a mix of WIN7 and 10 workstations.  If this is related to disabling SMB1 is there a workaround to emulate the same sort of browsing functionality?
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Once you've used up all your private RFC 1918 space, are there certain non RFC 1918 IP blocks that are best practice to use for internal addressing?
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Are there any known tools like advanced IP scanner I can use to scan the network and report OS?  I want to do a workstation survey and find out which machines currently on the network I am connected to are running Windows 7.
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I have two Sophos SG 230's that are configured for HA.  I have the LAN Port on the Master going to Switch 1.  I have the LAN Port on the Slave going to Switch 1.  I would like to add another LAN interface in the UTMs that I can use to connect them to Switch 2 for redundancy purposes.  

To properly do this, would I simply change interface eth0 (my current LAN interface) from "Type: Ethernet" to "Type: Bridge" and select one of the available interfaces / nics available on the UTM?
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I work in a corporate environment. I am based in the USA, corporate IT is in Germany. They image all of our computers via Matrix42. We have received a batch of new HP Elitebook 850 G5 laptops. I have them on our network and powered on. I have accessed the BIOS via F10 and have found that the PXE boot is enabled, but Germany does not see it. When the laptop boot, normally I would see the startup screen indicating IP addresses, DHCP info, etc. With the new batch, all I see is 'Protected by HP Secure Start'. I have access to the internet, so I know I am on the network. I can run IPCONFIG /all and see all my network info.

How do I configure this laptop for Network PXE boot?

Thanks in advance.
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Hi,

I am trying to test out VRF lite which I have to implement. I have a single router with some loopback addresses in different VRFs. What I am trying to do is to import and export routes between them which I should be able to do with the route import / export command but I am not having any luck.

I know this makes no logical sense to why I am doing it but I need to test this before I implement it in a production network (with many VRFs).

version 15.5
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Test-DC
!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

!

!


clock timezone EET 2 0

mmi polling-interval 60

no mmi auto-configure

no mmi pvc

mmi snmp-timeout 180

!

!

ip vrf Customer_A

rd 10:10

route-target export 10:10

route-target import 10:10

route-target import 10:20

!

ip vrf Customer_B

rd 10:20

route-target export 10:20

route-target import 10:10

route-target import 10:20

!

!

ip cef

no ipv6 cef

!

multilink bundle-name authenticated

!

!

cts logging verbose

!

!

redundancy

!

!

interface Loopback0

ip vrf forwarding Customer_A

ip address 172.18.7.254 255.255.255.0

!

interface Loopback1

ip vrf forwarding Customer_A

ip address 172.18.253.254 255.255.255.0

!

interface Loopback3

ip vrf forwarding Customer_B

ip address 192.168.17.254 255.255.255.0

!

interface Ethernet0/0

no ip address

!

interface Ethernet0/0.10

encapsulation dot1Q 10

ip

Open in new window

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Hello Experts
I need a batch file or script to add map driver for network location with letter x for example and ask for credential
and another batch or script to remove that mapped drive and credential for that network address
The scenario information
server IP: 192.168.1.254
shared folder on that IP: Home
Domain name: Private.local
1
Keep getting the following error on one of our domain client's pc's:  The name "my domain' :1d could not be registered on the interface with IP Address: 10.1.1.43. The computer with the IP address 10.0.0.46 did not allow the name to be claimed by this computer."  
Log Name: System
Source: NetBT
Event ID: 4321 Level Error

The computer with this problem can access the domain (all mapped drives) and can ping everything on the network.  
This computer cannot be pinged (IP or DNS name) by any other pc on the domain.  
Here is what I have done so far:
  1. gave this pc a static IP address (was dhcp before)
  2. Flushed the DNS
  3. Un-joined it from our domain and then rejoined it back to the domain.

I am still getting the same error and cannot ping or access from any other computer or server.

Anyone have any suggestions?
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Network Adapter Card SpeedHi,
 I have a desktop PC where network adapter card shows 10.0Mbps, but network card is capable of 1Gbps.
 It is currently connected to  Linksys LRT215 Gigabit VPN router.
 Strange enough, when I connect this computer to a Ubiquiti Networks 48-Port Gigabit UniFi Switch (Part#: US-48-500W), there is NO LIGHT lit on the switch. But all the workstation PCs and other PoE devices are connected to this Ubiquiti and every single connected port shows link and activity light.
So I have no choice but to connect to Linksys LRT215 Gigabit VPN router. Linksys is daisy chained to Ubiquiti Switch.

Can you help?
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Afternoon gents.   One of our clients has a satellite office that has been experiencing severe drops in wireless connectivity.  I am going to be going out to the location to troubleshoot the connectivity.   The drops are not happening during tunnel connections they are just in general.   Currently I am told all the equipment is under a desk including the device giving out wireless access.   I was given the equipment they have which is included in this thread.   Has anyone seen this combination of equipment together ever and seen wireless drops happen?
I currently have no remote access to any of this equipment and will not be able to troubleshoot it until I am onsite but I wanted to see if I could get a jump on things and reach out to you for some assistance perhaps you may have seen this setup before and may know where the wireless drops are happening.   This is especially happening on one HP Laptop that I have fully reformatted, installed the latest drivers on including HP Support drivers for the NICS firmware yadda yadda.    They need this to be stable as they tunnel to their other office which has a WatchGuard firewall in place.  

Here is what they have from what has been explained to me.   I am unsure if firmware can be flashed? Or does the modem or firewall whichever is giving out wireless access need to be put on a desk and not under a table?  


Here is the kicker, they will have a laptop on the desk right on top of where all this equipment is located under …
0
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I have a range of IP's a beginning and and end how can I figure out the subnet?  209.182.170.239-254
0
Hi,

I have Cisco 3750 switch. I configured 3 Vlans on it. VLAN 10,20,and 30. Is there anyway that I can give VLAN 10 access to  VLAN 20 and deny it from access VLAN 30? I mean I want network of VLAN 10 and 20 to see each other and communicate but can not access network of VLAN 30

VLAN 10 network 192.168.1.0
VLAN 20 network 192.168.2.0
VLAN 30 network 192.168.3.0

Thx
0
We have two separate sites, and they are linked with a high-speed network. Site A has a Vcenter version 6.X with vDS and Site B has vCenter 6.5  U2 with vDS. I am palming to upgrade both sites with vCenter 6.7, and I am thinking of implementing vCenter HA to manage both locations.
Let me describe my environment
Site A
VCSA6.* with Embedded PSC ,  srva.mydomain.local
vDS switches for the iscsi, virtual network,vmotion
Esxi mgmt network 192.168.3*
vCSA is in virtual network 10.10.1.*
Site B
vCSA 6.5 U2 with Embedded PSC, srv2.mydomaon.local
vDS switches for SCSI, VMotion, virtual network.
ESxi mgmt network 192.168.2.*
vCSA is in virtual network 10.50.1.*
I want to make one vCenter (Site A) as active and should include both sites A and Site B ESXi hosts in a separate cluster (cluster A and Cluster B) and make Site B as passive. Is it possible to do?
I have been reading about HA and Enhanced link mode etc, but they all talking about keeping the HA in one site.
I can not find the answer.
Can someone shed me some light and help me on this if it is possible?
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Hello, I am running server 2016.
I am trying to map to it, I can’t see it on my network.
I can Remote Desktop to it but I can’t map a drive from it.
I have set the Advanced Sharing settings in Private, Gust or Public, Domain, and All Networks to Turn on network discovery and Turn on File and printer sharing.
What am I missing?
Thank you
0
I have a test RODC (running on Windows 2012 R2 server-core) that I created in a perimeter network that I'd like to demote and remove from my domain entirely.  I'm having trouble finding documentation for this scenario that covers the process from top to bottom.  

Can anyone point me to a good source of documentation for this task?

Thanks!
0
I wish to route TCP traffic from one colo location onto amazon web services ( central canada) , then onto amazon web services ( singapore) . What is the preferred way to do this using aws services ?
0
I share a Bluetooth speaker booster with a colleague and every time I need it I have to ask my colleague to disconnect or “Forget this device” so I can use it.  How can I configure my mobile devices or the speaker to connect from one device and disconnect from the other?  (If possible)
0
VoIP - My customer reports that their phone lose connection to the hosted service every day.  They have to reset multiple times per day.

I will be onsite sometime tomorrow (April 11) - hoping to be able to access some expert assistance.  Meanwhile, if somebody could point me to a link that I'm sure exists, to help me in troubleshooting VoIP.  I'm good at networking, but have minimal experience in troubleshooting VoIP.  Thanks in advance.
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Cant print after upgrading Windows 7 to 10.  I have network printers and after upgrading two machines, neither can print.  Have uninstalled and reinstalled multiple times.  Other machines that were new installs of Windows 10 can print without issue.  So far the only thing i have been able to print is a pdf from Edge.  Test print fails although i do see the test page hit the queue momentarily before i get the failed to print message.  Please help.
0
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Internet explorer and Edge does not open webpages giving the following error: There was a temporary DNS error. Try refreshing the page.
Error Code: INET_E_RESOURCE_NOT_FOUND. When accessing the internet with Chrome, it works without any problems and you can access any website. I have reset network settings and also flushed the dns and cleared everything in the browsers. Nothing made a difference. Any idea what is causing this? Windows 10 pro is the operating system and this problem started about 2 weeks ago.
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Hello fellow Experts Exchange members:

I request assistance with a confounding problem.

I have an office that uses Cisco Meraki access points all connected to a Cisco SG300-52P switch.

The office uses a separate vendor for their VoIP phone system.

The event log on the Meraki cloud controller is filled with entries that read "Multiple DHCP servers detected."

The entries state that the second DHCP server has an IP address that is not on any of our equipment with a MAC address that identifies it as a Cisco device.

When I put a secondary IP address on one of our devices in the same subnet as the unidentified device, the unidentified device responds to pings.  Using telnet to connect on port 22 brings up the text "SSH-2.0-Cisco-1.25" but typing any character immediately results in "Connection to host lost."

The unidentified device does not respond on port 80 or 443.

Reviewing the MAC address tables on our Cisco switch, the MAC address of the unidentified device is seen on a port that is physically connected to the VoIP phone system vendor equipment.

(There are multiple MAC addresses listed in the MAC address table for this port besides the unidentified device.)

However, when troubleshooting with the VoIP phone system vendor, their technician reports they cannot detect the MAC address of the unidentified device on any of their equipment.

The first part of my question is if it is possible for a MAC address to appear on the MAC address tables in a …
0
I have Charter Spectrum service here in western Oregon. I need port 9000 to be open to the internet on my pc, because we set up debugging on our remote web server and it needs to get through 9000 on my pc so it can talk to my Netbeans IDE. The Spectrum tech has no idea how to set that up. Ive tried in the router they gave me, a Sagemcom Fast 5260, but the port forwarding rule I set up just will not work. So, Im thinking about getting a better router than the cheapie they gave me. What's the best router available that will allow port forwarding?
0
Hi

I have an igel on a Citrix server and the internet on it and using excel is extremely slow.

I’m stuck in an argument with my I.t dept at the moment as I’m convinced it’s the bandwidth is insufficient.

Is there any other common known causes for slowness.??
0
Hi,

I am a new IT Specialist for a Financial company, and I use to be in charge of everything in my previous job. From IT Administrator, IT Technician, IT Support, and Network engineer plus any other big project we had. Now, I am in the same role, and an IT-Outsourcing company hosts our server and services. I had the same in my previous job, and I was employed to reduce the IT costs, which I did.

On my last job I had an agreement with the IT Outsourcing about have access to our server "Windows Server 2008 and Exchange 2010 plus all the passwords so I could give proper support in house. When I was on holidays, the IT Outsourcing company used to take over. Now, with this new job also and have an IT Outsourcing they are refusing to give me the passwords and settings we use to provide the necessary support. I want to find a way to deal with the IT company so I can use the support in the house.

That might seem to be a silly question, but I would like to hear from the IT Managers that had this experience.

Could you tell me where I could get the best advice in regards on how to deal with this situation?

I hope to hear from you soon.


Best regards,
Mallony
0
In an ISR at a client, they have a Cisco ISR with a VPN tunnel to a business partner. What I'm wondering is why they might have two peers
in sequence number 10 and one peer (which also appears in sequence 10) in the second sequence number. The original setter upper is
long gone. Is SEQ 10 saying try to connect to 169.45.97.62 but if you can't, connect to 169.45.95.222? If that's the case, why would there
be a need for a SEQ 20 which then again references 169.45.97.62? Any thoughts on what the original intent was are appreciated. I would
think you'd just want one peer in sequence 10 and then one peer in sequence 20. ?

crypto map ACMEDYNO 10 ipsec-isakmp
 set peer 169.45.97.62
 set peer 169.45.95.222
 set transform-set ACMEDYNO
 set pfs group2
 match address CRYPTO-ACMEDYNO-LA
crypto map ACMEDYNO 20 ipsec-isakmp
 set peer 169.45.107.62
 set transform-set ACMEDYNO
 set pfs group2
 match address CRYPTO-ACMEDYNO-DL
0

Networking

94K

Solutions

67K

Contributors

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.