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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146 views

Difference between coupling with bridge and router

(warning: this is an old exam question, for which I don't have a solution): Assume 2 local networks LAN1 and LAN2, with Endsystems A,C in LAN1 and B,D in LAN2. The networks are coupled with a bridge. ...
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setup VXLAN forwarding to multiple destination on Linux [closed]

I can't setup forwarding of all zero (unknown, I assume)/multicast ethernet frames to multiple unicast IPs (virtual tunnel endpoints), although it seems that it should be supported (also mentioned ...
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148 views

Should Consumer Router plugged into dotx (802.1x) enabled port see only WAN MAC address?

Probably a quick question. I am testing my dotx (802.1x) deployment on an Access Layer switch. I want to know if I plug in a consumer router, like a Linksys or Netgear, will the dotx only see the WAN'...
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Can a mikrotik 750GL have the same IP as the DSL router connected in a different port? [closed]

On a simple network of about 10 computers setup with static IPs in the 192.168.1.x range, the ISP's DSL router occupies 192.168.1.1. All computers and the router physically connect to a simple network ...
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135 views

With reference to Juniper MX , what's the difference between Bridge Domain and Learning Domain?

I am trying to understand the difference between bridge domain and learning domain. I have tried to read through documentation and Juniper MX series book but no success. Need to understand the ...
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737 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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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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1k 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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232 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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680 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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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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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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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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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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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 ...
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124 views

wifi bridge mode [closed]

I've a typical situation: server1 - switch1 - link-bridge (AP1) <----> link-bridge (AP2) AP1 and AP2 are 2 dlink-dap1360 (wireless N) with wpa2 so, if I connect my laptop to AP2 via cable I ...
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563 views

Extending Optimum WiFi range [closed]

How would one go about extending an optimum wifi connection? I would assume a bridge would be better than a repeater so the network wouldn't suffer from reduced bandwidth, however I have learned I ...
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How can I access switch port protected by 802.1X thats in a seperate collision domain seperated by a T1 bridge

I want to be able to remotely access an Ethernet switch-port protected by 802.1x. The switch I want to access is at a distant site, but I have a T1 circuit that goes from that site to my office. I ...
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302 views

Internetworking devices

Are hub and repeaters the same? And the same applies for switched and bridges? Since I am finding hub/repeaters and switch/bridge in some books while hubs/switch in others. Also in which layers do ...
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How, if possible, extend WiFi network over Internet?

sorry if my terminology is way off, I'm not well versed with networking. Can any combination of hardware and software make following scenario a reality: In location A there is a WiFi network called, ...
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Can't access Bridged DMZ IP's from NATed LAN

I've configured my pfSense router with two bridged WAN to a DMZ (OPT2). Everything is fine to access web server from external with public IP directly on servers behind DMZ. The setup is pretty much ...
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Should snmpIfHCInUcastPkts include packets bigger than 1522 bytes? [closed]

Packets bigger than 1522 bytes (as counted by Spirent Test Center) are being forwarded (bridged) but not counted in the following hardware counters on an Open Network Linux device: ifHCInUcastPkts ...
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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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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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Bridge mode: will traffic go to the router or not? [closed]

I have a timecapsule connecting to my ISP router in bridge mode. My question is: If i'm connected to the timecapsule, and exchanging data with the router, will the traffic go to the router to come ...
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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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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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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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What is the security purpose of a bridge? [closed]

Linux bridges operate at layer 2 and therefore can only switch packets between interfaces whose mac addresses are contained in a single bridge; a full router operates at layer 3, and thus allows ...
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56 views

How do layer-2 devices (bridges/switches) join a multicast MAC address?

I was going through the IEEE 802.1Q (2018) standard on my own. The standard speaks about group addresses, and how these group addresses are learned by transit bridges, which is all fine. But how do ...
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651 views

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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what is the main function of root bridge and ring master?

When we learn the STP or RSTP,we all learn the election of root bridge, the lowest priority number or MAC address of switch will become the root bridge.So here is my first question: 1.So what can the ...
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353 views

Why do WiFi bridges replace the source MAC Address with their own?

Ive read quite a bit about the issues i currently have with my Aruba WiFi Bridge 501 and the failure of DHCP going through, and as far as i can tell the issue is that the bridge replaces the MAC of ...
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224 views

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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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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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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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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WLAN Bridge connected over WLAN to the internet

I need to establish a WLAN Bridge over a distance of approximately 400m. I found this equipment: https://www.ligowave.com/products/apc-propeller-2 As I understand it needs to connect over LAN to the ...
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BPDU Header System ID Extension

Previously network switches was using the 8 byte field Bridge Priority to identify a root on the network.When networks grows and becomes complex vlan creation comes into play the 2 bytes Bridge ...
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Unknown device mac address listed in switch table on start out

After playing a little bit with a topology randomly created in packet tracer, I figured out that the switch (Switch0) stores a unknown device mac address on start out, wich I think that it belongs to ...
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252 views

RV320 router between 2 access points and secondary VLAN [closed]

I have a Cisco RV320 that is sitting between 2 different routers/access points on my network. Essentially: My ISP's router/access point <-----> RV320 <-----> My other access point My ...
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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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994 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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Secure connect & access across 2 separate LAN Subnets using PFSense/ Sophos?

Secure connect & access across 2 separate LAN Subnets using PFSense/ Sophos? Following is an older diagram of a 2+1 level Small Business/ Startup + Co-working space, with recent expansion & ...
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SNAT packages to the wrong destination while bridging [closed]

I have a Raspberry Pi physically between my switch and my client. The switch uses 802.1x authentication with an radius server. If I setup my Raspberry in transparent bridging mode everything works ...
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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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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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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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link several powerline networks using wireless? [closed]

|---------| |---------| |---------| |---------| | | | | | | | | | PLCnet1 | <-WIFI-> | PLCnet2 | <-WIFI-> | ...
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Can a Bridge forward frames with the destination as broadcast/multicast

I have a question regarding multicast and broadcast frames on a network bridge. Will the bridge forward these frames from one network segment to another network segment ?

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