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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10
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2answers
2k views

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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pfSense multi-wan Bridge, NAT, Load balancing and CARP

Context I currently have : 1 pfSense 2.0.2 router (on a Firebox X-Peak X5000) 2 WAN 1 LAN 3 Servers My interfaces WAN1 68.XX.XXX.98 to 69.XX.XXX.102 WAN2 65.XXX.XXX.58 to 66.XXX.XXX.62 LAN 192.168....
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3answers
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Advice for network & device configuration using Comcast Modem?

Summary My ultimate goal is to run a VPN through my Cisco Router, which to me means getting the Comcast Gateway out of the way. To this end, I would like to place my Cisco Router (and/or Switch) ...
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1answer
36k views

Difference between gateway, router, switches and bridge

I am going through a course of networking and want to know the difference between the mentioned devices. I have heard that the switches: Establish a temporary connection between the devices connected ...
6
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1answer
9k views

Mobile devices behind wireless bridge not getting IP address

I'm trying to get a wireless link set up to a building about 1/2 mile away from the rest of my network. I'm using a pair of Engenius EOC2611P radios, and as far as I can tell everything is set up ...
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5answers
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Why do we need repeaters since there are bridges (or switches)?

I was reading the HowStuffWorks article on ethernet. From the article, I understand that bridges are just like repeaters, but with the added benefit of not cluttering up other collision domains. So I ...
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1answer
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?
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2answers
3k views

Difference between Switch and Linux Bridge

In my network, I need some manageable switches. So, somebody advised me to configure the Lab Linux servers as bridges using brctl. Those new bridges should act like switches. What should be the ...
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1answer
1k views

802.1Q VLAN over Deliberant APC wireless bridge - am I doing something wrong?

I've previously run a Cisco based network (Catalyst switches, ASA and PIX firewalls) which segmented a medium sized business network into 8 VLANs with little issue. I've recently started in a new ...
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2answers
335 views

Bridging LAN networks privately in office environment

I've begun looking into network bridging, must most of it is witchcraft for me so far. I currently have the following setup: I use PC 1 as my development station and PC 2 as a deployment/test station....
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1answer
358 views

Why routers change mac address of frames (and bridge not)?

I learned that router change mac address of packet with that one of its own outgoing interface, while this doesn't happen with bridges. I find it difficult to understand the logic under this ...
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1answer
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MikroTik - problem with port bridge over LAN using 2 switches [closed]

I have RB2011UiAS-2HnD-IN router in my network. It has two switches - "switch1" with 5 x 1Gb ports and "switch2" with 5 x 100Mb ports. There is only one LAN addressing pool - 192.168.1.0. All 5 ...
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1answer
694 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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1answer
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Cisco ASA and BVI interfaces

I'm in the middle of equipment migration and the setup is somewhat similar to Mike's (Configure Cisco ASA in Transparent mode: Layer2 DMZ w/ Vlan translation) but with a difference that I need the ...
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6answers
146 views

Why does STP choose the lowest bridge ID as the root bridge?

The switch which has the lowest bridge ID can be the root bridge,and the bridge ID is made of priority and MAC address,that is , bridge ID = priority + MAC address So we will choose the switch which ...
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2answers
525 views

PAgP over transparent wireless point-to-point links

We have 2 buildings which are interconnected by 2 wireless P2P links. One is used as main connection, the second one is for redundancy and backup. So far, we have these 2 buildings in flat L2 network ...
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2answers
571 views

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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1answer
2k views

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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1answer
289 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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3answers
829 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 ...
3
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1answer
816 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 ...
3
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1answer
5k views

Wireless options for connecting two buildings together (300ft)

Situation: Previous company setup each building on their own ISP/Modem. They then used cisco routers to create a VPN connection over the internet from the looks of it to the other building. This from ...
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3answers
2k views

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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2answers
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Understanding Linux Bridging

I am trying to understand Linux bridging. Lets say I have a Linux bridge with two veth interfaces and a vNic. Bridge: br0 Interfaces: veth1, veth2, and eth1 Now, if I do brctl showmacs br0, it ...
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1answer
2k 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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1answer
260 views

What is the effect of having too many bridges / routers between 2 devices?

I am building a network, with each node connected to each other using fiber media converters. They are actually a bridge with 2 ports: one Ethernet and one optical (or one single-mode and one multi-...
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1answer
1k views

meraki bridge mode: dhcp is untagged

We have the following set-up: +------+ +--------+ +--------+ |Router|-----| switch |-----| Meraki | +------+ +--------+ +--------+ | +---------+ ...
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1answer
217 views

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 ...
2
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2answers
277 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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1answer
48 views

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 ...
2
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1answer
4k views

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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2answers
238 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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2answers
304 views

Cisco 1841, Bridge T1 WAN to hosts with public IPs?

We currently have a Samsung router given to us by Covad. It is configured like this: PPPoFR T1 WAN (samsung router) x.x.x.49/29(public address) gateway ...
2
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1answer
873 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 ...
2
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1answer
164 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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1answer
8k views

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 AP ...
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1answer
2k views

Problem bridging two networks with Ubiquiti hardware

I want to bridge two networks using a Powerstation 5 22V and a Nanobridge M5 from Ubiquiti but I'm having serious problems with it. Here's a small doodle describing how the network looks like: Now ...
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1answer
3k views

Why do my network adapters do not show IP addresses when bridged? [closed]

I've set up an Ubuntu 14.04 virtual machine with two network adapters. eth0 (bridged adapter) - 192.168.0.105 eth1 (NAT) - 10.0.3.15 I have performed ping commands to ensure everything is fine: ...
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1answer
2k views

Reach to LAN device from a different subnet

I have my network configured this way: The ISP router giving internet access (192.168.1.1/24) through wifi (SSID wlan01). Connected to this wifi I have a Nanostation2 (192.168.0.20/24) in bridge ...
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5answers
872 views

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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4answers
233 views

Bridges and switches

Bridge forwards frames between PCs based on S/W. Switch forwards frames between PCs based on H/W. What does S/W and H/W mean?
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2answers
220 views

How do routers. switches, bridges and hubs deal with corrupted data?

By data corruption I mean frame/packet corruption, we can stick to the corruption due to a collision for simplicity. I know that switches can detect frame corruption if they are not set to cut-...
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2answers
180 views

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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1answer
65 views

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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1answer
907 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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1answer
524 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
795 views

How to bridge two networks with Ubiquiti hardware?

I want to connect two networks using a wireless bridge. My networks are in different subnets and each have their own router (and DHCP server, and independent internet connection). I tried a basic ...
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2answers
126 views

How do I create hard wired communications between multiple lans with individual wan connecitons [closed]

First off, I assume this is a simple question, but I do not have a background in networking. Nonetheless, I am responsible for setup and maintenance. I would appreciate any help. I have the ...
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2answers
405 views

Cisco BDI not Forwarding L2 Traffic?

I'm new to interface bridging, and I have an ISR4431 running 03.16.04b.S on which I need to bridge between two interfaces for two hosts: One interface is connecting directly to a host, the other to a ...
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1answer
2k 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 ...