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Questions tagged [bridge]

Network bridging describes the action taken by network equipment to allow two or more communication networks, or two or more network segments, to create an aggregate network. Bridging is distinct from routing which allows the networks to communicate independently as separate networks. A network bridge is a network device that connects more than one network segment. In the OSI model bridging acts in the first two layers, below the network layer.

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How do I bridge a Cisco 860VAE-W from VDSL to Ethernet?

I've got a Cisco 860VAE-W which I'm trying to bridge. I picked it up because I was interested in learning a bit about an IOS device – I'm coming at this pretty raw. >show inventory NAME: "C867VAE-...
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packet filtering using bridge vs router

I have a question about the bridge vs router packet filtering using firewalls. I know the basics of the router and bridge and on which layers they work. I just wanna know that on bridge how does ...
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68 views

Bridges, hubs, switches and repeaters in subnetting

I'm learning to subnet and I'm constantly doing exercises on paper about this topic. I'm trying to breakdown a network into smaller subnets, given the number of hosts for each one. For now, I only ...
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Using 2 different ISP In case one dies

It's my first ever post in here and I hope not the last. I'm looking for some advice. I'm trying to reduce my internet downtime for a local network. My setup. Mix and match computer environment (...
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Upgrading Cisco 819 to 809, can I connect devices to 2 routed ports and be on same subnet?

The company I work for has multiple remote "IoT" style sites connected back to the datacenter via a Cisco 819 cellular router. We are in the process of upgrading these to the newer Cisco IR809 routers ...
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Bridged Mode Networking vs. Network Bridge

I have just learned about bridged mode networking in VMWare and I wonder how is it different from the "bridge" used in physical world networking? According to what I've found myself so far, I guess ...
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How does a collection of bridges determine which ports have to be blocked? [closed]

This was a question on an exam about Computer networks that I got: "In which consecutive steps does a collection of bridges, that combine some network segments into one subnetwork, determine which of ...
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Is Network Bridging secure [closed]

Bridging two network cars in Windows allows the two separate networks to connect. Assuming there are three NIC cards present in a machine: A, B and C. If I bridge NIC A and B, is there a possibility ...
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133 views

How does Kismet find WIRED devices when scanning Wi-Fi? [closed]

In an effort to better secure my Wi-Fi network by finding its weaknesses and mitigating them, I have employed the use of Kismet, a well known Wi-Fi security scanning tool. When I use Kismet to scan ...
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What is the bridging decision when getting ARP request?

Setup: Assume I have 3 VMs. VM1 VM2 and VM3. VM2 has two interfaces, say eth1 and eth3. eth1 is connected to VM1 physically and eth3 to VM3. I create a bridge on VM2 using brctl with eth1 and eth3. ...
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Does bridging add delay?

If I use a bridge to perform traffic sniffing like man in the middle will the bridge add a delay? And what word should I use delay or latency?
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Does bridge store ARP reply information?

In above picture, D is sending packet to E and bridges B1,B2,B3,B4 have no forwarding entries. Firstly, D sends packet to B3 nad B3's forwarding table is updated. B3 sends packet to B2. Therefore, B2'...
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Cisco Catalyst 3850 router VLAN bridge no routing

New to Cisco stuff so bear with me (only a little L2 Procurve experience). I have a development network connected to an Aruba/HPE managed switch feeding a trunk with tagged VLAN's to an internal ...
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What is a VLAN (really)?

My question is about the literal and precise meaning of the term "VLAN". According to IEEE 802.1Q-2014, a LAN is a single segment of a medium. A cable connecting a PC to a switch port is a single LAN. ...
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Discovering public ip from wifi signals, shodan, parent router NAT [closed]

MAC addresses innately do not change right? and you're able to scan for broadcasting APs where you'll be able to detect different nearby mac addresses of each AP.. Public IP addresses change, ...
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693 views

Bridging networks without NAT: how it's done?

I have quite limited networking experience, so probably i'm asking about very simple things. I'm reading about linux bridge interfaces, and documentation states that there is no NAT by default and ...
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989 views

How to make virtual devices on GNS3 be able to ping the physical host

I have had this problem already and figured out its reason. Basically the problem is that the virtual devices on GNS3 cannot ping the physical host and also the physical host cannot ping the virtual ...
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660 views

Cabling two access ports on the same switch from different VLANs

Theoretically would I be able to connect two switch ports together with a simple straight/cross cable on the same switch. If the two ports are in different VLANs (eg. 2 and 22) and ports are in ...
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207 views

Wifi ap bridge WLAN network with WAN network

Googling "WLAN Bridge" mostly gives results about WDS bridge (wifi device to wifi device communication) What i want to do is basically bridge the router's WLAN and WAN interface (disabling NAT, ...
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How to access to virtual interface with static IP thanks to VPN?

Question : Is it possible to use a VPN solution to access to a remote PC in the following context ? Context : Objective : We need to connect a specific software (that uses a particular port) to a ...
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1answer
456 views

Phone and PC network sharing one wifi bridge

We have a Cisco router from our T-mobile provider, two subnets on two ethernet ports: one subnet for PC data network, one subnet for IP phone network. The subnets have different IP addressing. As per ...
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570 views

Force VLAN traffic through specified interfaces

I have two VLANs, VLAN1 for "clients" and VLAN2 for (web)servers. Both VLANs have two ports in etherchannel (one Cisco switch). I would like to put transparent (WAF) device in bridge mode between the ...
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243 views

Cisco router under workgroup bridge AP

My question is about addressing a Cisco router interface so that I can use both bridging through an access point as workgroup-bridge and also connect to the access point to configure it. Apologies ...
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1answer
380 views

Can a network bridge be viewed as a two port switch?

I never worked with bridges because they were no longer used when I first got internet at home, and I have some troubles understanding what exactly was the role of the switches. From my search I ...
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Working of bridges not making sense

I am reading the book on Data Communications and Networking by Behrouz A. Forouzan Suppose a device A on LAN 1 wants to connect to the device B on LAN 2 . Initially the bridge table is empty . ...
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Bridge for collision domains

I have read that a bridge/switch can be used to increase the number of collision domains in the network, but somewhere I also read that a bridge reduces collision domains. Is it possible for bridge to ...
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Cisco ISO - Are all interfaces assigned to bridges automatically?

I'm currently looking at configuring a second bridge on a cisco switch, however it appears that all interfaces are 'automatically' in the first bridging interface because they are part of Vlan1, which ...
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How transparent bridging Wi-Fi with Ethernet works?

The way I understand (two-port) transparent bridging is that the bridge simply forwards packets to another segment on the network. But since the MAC address of the ethernet interface is different to ...
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Is there an “active” network tap (not just passive)? [closed]

Passive network taps seem to be pretty simple. What if I want an "active" network tap? Let's say I want to change some HTTP packets, for example add info etc. Another thing that would interest my ...
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177 views

How can I bridge multiple interfaces to a single one a Cisco ISR C891F but making each one able to communicate only to the destination interface?

As the question says: How can I bridge multiple interfaces to a single one on a Cisco ISR C891F, but making each one able to communicate only to the destination interface? Let's say I have ...
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291 views

How can I prevent VLAN bridging on a Cisco switch

A Cisco switch (IOS) on our network configured with VLAN 7 and VLAN 8 as access VLANs (7 being the native for the trunk on the switch) had the VLANs bridged by someone who connected a patch cable from ...
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111 views

What is EB (Ethernet Bridge)? [closed]

I'm new to centos and networks and I was reading documents about how to use direct commands on centos7 firewall-cmd using man 1 firewall-cmd I saw this line: The first argument of each option has ...
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423 views

Accessing Internet from a different VLAN. Cisco 200-26

I have just had a cisco 200-26 smart switch with 24 ports. I have set the IP of VLAN1 (also management Lan) to 192.168.1.254. All ports except port 10 and 11 are assigned to VLAN1. Furthermore, I have ...
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Merging two networks

I am new to networking and I want to understand how to merge (bridge) two networks and what all things (parametres) change when the nerworks are merged. Can somebody explain more in an educational way?...
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1answer
720 views

Cannot bridge point-to-point between autonomous AP and lightweight AP

I'm doing some tests in a company, and I have some problems. My mission is to configure an autonomous AP Cisco AIRCAP-2602E, and do a Wi-Fi bridge point-to-point between a Cisco lightweight AP and ...
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1k views

Use iperf to split multiple tcp streams between 2 NIC on same client (similar to IxChariot)

I have 2 PCs connected to each other using two 1 Gbps ethernet link, to have an aggregate data bandwidth of 2 Gbps. In IxChariot, I can create multiple TCP pairs and split them into: PC1_LAN1 <-&...
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1answer
1k views

Bridge two QinQ interfaces on a juniper router

On a Juniper MX router I've got 2 interfaces that I need to bridge together. Interface A has QinQ configured: vlan-tags outer 0x8100.1 inner 0x8100.600 Interfaces B has QinQ configured vlan-tags ...
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1answer
354 views

Regarding Bridge domain and L2 vpn

I am trying to understand the usage of bridge group command.Please refer the following config(on switch ASR9k): l2vpn ! bridge group TEST1 bridge-domain BD1 interface Bundle-Ether1.500 ...
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1answer
118 views

Different between VLAN broadcast behavior on a Cisco switch and a Linux bridge

When will a packet be tagged/untagged with a VLAN tag in these cases: On a Cisco switch On a 8021q subinterface in Linux (for example, eth0.10) On VMWare ESXi (with VLAN ID in VMNetwork setting) ...
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670 views

What is WDS and how can it cause a broadcast storm?

Recently I was told that we leave WDS off ,whenever we can, where I work. It was explained to me that a broadcast storm is created when a routers' broadcast gets back to itself, perpetuates itself and ...
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2answers
208 views

Bind IP To Port

I have a Cisco 877 router, running IOS Version 12.4(24)T3, with 4 Ethernet ports and multiple external IP address attached to the internet connection. I usually just nat the external addresses to ...
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2answers
196 views

Join internal networks

we've expanded our business to a nearby building with its own network and i am trying to join the two so that the workstations can see each other, but they continue to use their own internet access. ...
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Can 802.11a connect or can bridge to 802.11n?

Can 802.11a connect or can bridge to 802.11n? I do search the internet but it doesn't gave me a clear idea. I also searched in this site, but I saw, b to n, or ac to n. I'm an amateur in this kind of ...
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What is the difference between “Client Mode” and “Independent Bridge” in an AP?

Considering the 5 modes of operation of wireless access points described on this page, there a among them: Mode 2 - Bridge. Most APs can also be configured as a Bridge. In such Configuration the ...
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22k views

Configurating VLAN access and trunk ports on RouterOS/Mikrotik [closed]

I have RouteBOARD RB951G-2HnD, RouterOS 6.34.2 and I am trying to achive a network configuration something like what is depict on the next picture. The picture is from Mikrotik Wiki http://wiki....
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Can bridging two networks in Windows Server 2012 lead to an external attack?

I have two LAN networks on my server. I tried to bridge them, but the server got attacked post bridging. Does bridging open additional ports on the existing connections, and can bridging alter the ...
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341 views

Network/Socket Connection Issue

Problem Socket Connection between 192.168.1.1(Server) and 192.168.1.12(Client) can NOT be established (See Fig. 1). Tests Test 1: "Ping" ping 192.168.1.2 -S 192.168.1.1 -> Success ping 192.168.1.12 ...
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673 views

Connect to wireless network on different subnet

I have a lift motor that has an app that allows me to move the lift up and down. The lift creates its on Wi-Fi network with a default gateway of 192.168.4.1 My existing network is 192.168.1.1, I have ...
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1answer
437 views

Port-selective transparent forwarding with routing?

I'm trying to sanity check my lack of understanding of a colleague's network planning exercise. It doesn't make sense to me, but maybe I'm missing something. My general networking knowledge isn't bad, ...
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2answers
116 views

Combining Two Networks With Hardware [closed]

My office has two internet connections and two routers and two networks. One network is used for the Internet connect and has great speeds. The second network runs our IP phones and is a backup ...