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Questions tagged [virtual]

For questions about virtual interfaces on network devices. For instance, you want to bridge two interfaces on a router and want them to be in the same Layer-2 broadcast domain. In this scenario, Bridge Virtual Interface (BVI) or Bridge Domain Interface (BDI) interfaces would act as the routed interface for those two bridged physical interfaces.

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EVE-NG doesn't run any nodes other than VPC and vIOS devices

I'm running a Community edition of EVE-NG on a nested virtualization setup but cannot run any of the "real" images in the lab. It's just the virtual PCs and Cisco vIOS devices that seem to ...
Sylar's user avatar
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1 answer
139 views

What's the difference between RED and VPN?

I know that RED is Remote Ethernet Device and VPN is Virtual Private Network. But I think that they work as the same way. Someone can help me?
Jonas Lucas's user avatar
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1 answer
90 views

Can, and should, a link local address be used for a gateway in IPv4? [closed]

I was just experimenting with IPv6 and hypervisors, where I made productive use of the IPv6 link local address to route packets towards a tap device to establish communication with a virtual machine. ...
fdr's user avatar
  • 103
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0 answers
147 views

L2 connection from the simulation network in GNS3 VM to the physical network

GNS3 VM is used to run GNS3 network simulations. How can I connect from the network in the simulation to the physical network at Layer 2? For example, create a GNS3 environment with the following ...
longer's user avatar
  • 101
0 votes
1 answer
462 views

Total delay of virtual circuit switching? [closed]

We know that virtual circuit switching(VCS) has both features of circuit switching and datagram switching. It uses connection oriented path but may or may not dedicated that means resources may or may ...
S. M.'s user avatar
  • 398
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1 answer
70 views

How does on-premises cloud work?

Perhaps I don't understand exactly what the cloud is, but I am of the understanding that it is a model whereby computing resources (i.e. servers, computers, processors) are accessed over the Internet ...
Academic005's user avatar
1 vote
1 answer
398 views

Who should reset TCP connection after VIP has moved onto another host? [closed]

Imagine such a situation - TCP connection(NFS4 or database) between client(Linux) and virtual IP hosted on a server(Linux). Server fails and VIP is taken over by another server(using ARP). The client ...
ibre5041's user avatar
  • 111
0 votes
1 answer
30 views

Virtual Circuits in a narrow band network

I know that in a broadband network a virtual circuit is established like in an X.25, frame relay and ATM. Is there a virtual circuit established in narrow band network and if yes then how is it ...
Muhammad Ahmad's user avatar
1 vote
0 answers
109 views

VETH ports not working for cisco vIOS L2 devices (vios-l2 and nx-osv) using kvm/qmeu for virtualisation

Ok, so I've been toying with veth links for my Cisco routers and they have been working fine. However when you throw in a virtual switch like the Cisco nx-osv or vios l2 image, using veth interfaces ...
Heath C's user avatar
  • 11
0 votes
2 answers
1k views

How is it possible to get multiple virtual network interfaces with only one physical network interface?

I'm currently struggling about the fact that I could create (almost) unlimited virtual network interfaces with only one physical NIC. How does that can be possible ? To give you more context about my ...
LeBovin's user avatar
1 vote
1 answer
251 views

How to define trunk port between vmware esxi host 6.5 and switch? [closed]

I create some virtual machine in different vlan but i can not set trunk port from vmware to transfer vlan information.
Amir Sabeghi's user avatar
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1 answer
32 views

Is it possible to realize end-to-end SSL connection without using ssl accelerator? [closed]

Between a PC and a server I want to realize a ssl connection that terminates at the server. When there is a BIG-IP between them, do I have to use ssl-accelerator on BIG-IP to make ssl connection? If ...
masafumi_from_Japan's user avatar
1 vote
2 answers
2k views

What is a substrate network?

Actually I am reading a paper for school homework. This paper is called : "JASPER: Joint Optimization of Scaling, Placement, and Routing of Virtual Network Services". They use the term "substrate ...
Jaox's user avatar
  • 13
3 votes
3 answers
72 views

Correct term for networks created for virtual machines and containers?

What is the correct term for the type of network created for virtual machines and for containers. For illustration a Linux virtual host might have devices docker0 as 02:42:a6:79:a6:bc with address 172....
Tim's user avatar
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1 answer
107 views

Physical device in subnet of virtual networks [closed]

I was wondering if it's possible to connect a physical Raspberry to a NUC running several virtual machines on an ESXi environment. The network is setup as follows: I want my physical device to be '...
CookieAndPizza's user avatar
2 votes
1 answer
242 views

VyOS: Failure to commit after L2TPv3 configuration

I am trying to get familiar with VyOS (using a VM) and while working on L2TPv3 I encountered something strange: after configuring the L2TPv3 interface and try to commit, an error occurs as if the ...
Hamdi Kadri's user avatar
0 votes
1 answer
405 views

How to connect separate physical devices to same virtual network in VMWARE [closed]

I am trying to create a vitual active directory network at home. I am trying to do this in VMWare. I have 2 actual physical computers. Here is the plan: 1st Physical Machine: Using vmware create the ...
sukhvir's user avatar
  • 101
-2 votes
1 answer
46 views

How cable connects to server if routers and switches are virtualized

Looking here for an example, I see: Spine Device Interface Summary As previously stated, the validated design includes up to 4 spine devices and up to 96 leaf devices that are interconnected by ...
Lance's user avatar
  • 107
0 votes
1 answer
645 views

If physical switches are necessary in a SDN

Exploring how to implement a Software Defined Network and here it explains that an SDN switch is only dealing with the data layer. But then: Do We Need Special SDN Switches for SDN Networking? ...
Lance's user avatar
  • 107
0 votes
1 answer
18 views

If Network Operating Systems or Virtualized Networks are installed on regular computers [closed]

I am learning about SDN and Network Operating Systems and Virtual Networks. I am confused about where the actual code that runs exists. Like when you have an application like a website, it runs on a ...
Lance's user avatar
  • 107
3 votes
3 answers
3k views

Virtual Appliance - Cisco Router

My colleague said that it is possible to virtualize a Cisco router i.e. run the Cisco IOS inside ESXi and it would act like a real cisco router so thus can be used in a light production environment. ...
Praneet Castelino's user avatar
1 vote
1 answer
204 views

Are there any Virtual Switch concepts besides vLAN, Virtual Switch, Virtual Distributed Switch, and Logical Switch?

While self-studying for a VMware Associate Certificate I'd see the phrase "Logical Switch" pop up from time to time, at first I figured it was a synonym for a virtual switch. Then I ran into a ...
neoakris's user avatar
  • 297
1 vote
2 answers
518 views

Physical / Virtual Interfaces.

Well, I know that's a simple question for the level of this forum, but yet, I didn't found anything on Google, at least not what I want. I'm studying for CCNA R&S and I just learned about ...
Andrewy's user avatar
  • 15
1 vote
1 answer
2k views

Packet-Tracer multiple IPs for a PC

I searched for a way to configure a PC with multiple IP addresses in Packet Tracer but i found nothing. I read that you can use the command netsh on Windows to create virtual interfaces. I've tried to ...
user avatar
1 vote
1 answer
1k views

What could cause kvm virtualized pfsense to get 84mbps behind physical pfsense, but then drop to 1mbps when it replaces physical pfsense?

I'm scratching my head on what could cause the following behavior: Scenario A: Laptop -> virtualizedpfsense -> switch -> physicalpfsense -> modem speedtest.com gives me 84mbps download (...
neoakris's user avatar
  • 297
1 vote
1 answer
1k views

What exactly is a 'virtual WiFi access point'?

Recently I've come across the notion of 'virtual WiFi AP'. For concrete examples of references to this notion, refer to these pointers: 1,2,3. I'm a bit confused about what virtual APs actually are. ...
fortune_pickle's user avatar
1 vote
2 answers
1k views

Virtual Circuit Identifier

In a Virtual Circuit Network how does a packet gets a VCI ? I read in Data Communication and Networking book by B.A.Forouzan that a packet with a VCI comes at a switch but there is no mention on how ...
shikhar's user avatar
  • 27
0 votes
3 answers
131 views

What does a switch have to do?

I'm thinking of something that would need to emulate an ethernet switch. We have a proprietary bus connecting a central unit with several "slave units", and I would like to move ethernet packets over ...
Treczoks's user avatar
1 vote
2 answers
70 views

Can i use an actual network management application and connect it to a router inside GNS3?

I want to connect a NMS to a router on GNS if it's possible, so that i can practice the "actual thing".
C.France's user avatar
3 votes
1 answer
348 views

Virtual Bridges do not seem to be carrying LLDP information

Network community, I am testing a Juniper virtual-SRX (D.70). When configured on a desktop the vSRX works wonderfully (fully functional/connected OSPF router), however when I plug it into the rest ...
dynamicruss's user avatar
3 votes
1 answer
563 views

Traffic shaping on juniper virtual-router

I have created a virtual routing instance allow traffic to be transmitted over private IP space: static-cust-inet { description "Virtual Routing Instance"; instance-type virtual-router; ...
Beeelze's user avatar
  • 275
2 votes
1 answer
63 views

Regarding Virtual Managed Services Solution vs Traditional Hardware approach

Not sure if this is is the right place to ask, but i will still go ahead.I have been reading up on Cisco's VMS solution and i see that the main stress is laid on the fact that things which were done ...
fsociety's user avatar
  • 905
3 votes
2 answers
1k views

How do you disable IGMP-snooping on virtual nic macvtap

Networking community, Question: How do you disable IGMP-snooping on virtual nic macvtap? Background: We have noticed that Juniper vSRX 15.1X49-D60 (Running on Ubuntu 16.04LTS Server KVM) is ...
dynamicruss's user avatar
1 vote
3 answers
96 views

How is Service chaining different from network functions virtualization?

From what i understand, both focus on replacing the traditionally implemented proprietary hardware services such as firewalls , NAT ,etc and try to implement it in software. So how do the two differ ...
john 's user avatar
  • 1,237
0 votes
1 answer
1k views

Spoof MAC address of VLAN interface on IOS

Is there a way to change the MAC address of VLAN interfaces (switched virtual interfaces) on IOS? I would like to configure the MAC address of a Catalyst switch. Because all VLAN interfaces derive ...
user2964971's user avatar
0 votes
1 answer
45 views

Lots of Small Requests over Broadband Connection - Slow Response Times? [closed]

I have setup my dual e5-2697 V2 system; using VMWARE WorkStation Pro 12, to run roughly 30 VMs concurrently. While the machines do a lot of "small requests", ping type requests, nothing more then ...
McFlySoHigh's user avatar
5 votes
1 answer
10k views

Difference between Linux Bridge and Open vSwitch [closed]

What are the most significant differences between how a Linux bridge and an Open vSwitch work?
Muff's user avatar
  • 183
2 votes
2 answers
2k views

Communication between VDCs on Cisco Nexus 7000 via virtual interface

Is there any way to create a virtual interface of sorts between two VDCs on a single Nexus 7000 switch? I've read that a physical cable is required (which is lame) however I wasn't sure if this was a ...
user315851's user avatar
5 votes
2 answers
3k views

Why does a switch have more VTY lines than a router?

During my years working with Cisco equipment I realised that switches have more VTY lines (16) as compared to routers which have 5 VTY lines considering that the equipment that we work with (c2960 ...
Manny265's user avatar
  • 280
0 votes
1 answer
756 views

Routing to a virtual machine through a VPN [closed]

I'm not sure if this belongs here or to Server Fault... but gotta start somewhere... I'm running a Win2008R2 server on VirtualBox. This server has an SNMP application. I'm trying to make this ...
Peregrino69's user avatar