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Questions tagged [switch]

a device that bridges network segments, operating at the OSI link layer level.

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0answers
15 views

Explanation of Port Access Control settings for a TRENDnet switch

I'm trying to set up some security settings on a TRENDnet TPE-082WS managed switch, in particular its Port Access Control settings (emulator link; press Settings to see it): The switch's manual is ...
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0answers
10 views

Mikrotik Port Based Bandwidth Limtation CPU 100% for 1/5gbps limit

I am using Mikrotik CCR1072-1G-8S+ as my main router. What I want to accomplish is to limit bandwidth of port X to 5 Gbps. Issue is when I use queue (almost all types of it) the CPU overflows. It ...
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1answer
78 views

Gigabit modem to switch gigabit uplink?

Times change, and we are adapting to now having gigabit internet service at a local charity. Since there is a gigabit uplink on the switch already in place (Netgear FSM726) I was wondering if the ...
7
votes
1answer
469 views

Layer 2 vs Layer 3 switches

I am a bit confused on when I need and should use a layer 2 or layer 3 switch. In the corporate network we have Aruba 3810 core switches, and all the access switches are HPE 1950 24/48 PoE+. We have ...
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1answer
57 views

Networking problems since new internet gateway installed

This case is a bit weird to understand, so I decided to ask here and see if someone can give me some guesses about what can be the root cause of the issue I'm about to describe. Our company has 2 ...
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1answer
99 views

Cisco Switch: Limit mgmt access to specific VLAN

I want to limit the access to the management console of my cisco switches. My idea was to only allow clients of a specific vlan to access it. In my current physical setup I have three unstacked cisco ...
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1answer
48 views

How to configure managed switch

The work environment is shown below. I want to install two new managed switches (cisco SG250-8) for the ones shown in green. I configuered the switches with one vlan and gave them the ip address 192....
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4answers
180 views

Upgrade to gigabit switch made long cable stop working

We have two buildings connected by a 30m network cable with a switch on either end. Last week we upgraded some old equipment to support gigabit speeds. One of the two switches was an old 10/100 ...
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1answer
43 views

Link Between NAT VMSwitch and NetNat Windows Powershell

Would really appreciate if someone can answer this for me it's been bugging me for a while. I've been going through documentation and articles on creating virtual nat switches and I have the process ...
0
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1answer
19 views

CX4 Infiniband to SFP+ Converter

It may be a weird question, but I'm facing the following problem at the moment: I've got a DELL PowerConnect 6248 Switch (managed Gigabit-Ethernet) with the YY741-Stacking module in the back. The ...
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0answers
15 views

Networking Traffic Replay Simulation

I have ten physical workstations as part of an exercise connected to a switch, on the switch there is a network tap for traffic analysis. I want to replay captured TCP traffic between the machines ...
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1answer
19 views

Whether the Speed Auto can have a network speed reach to the switchport top?

My Juniper EX4300 Switch ge-0/0/42 switchport configuration is bellow: admin@1409A# run show interfaces ge-0/0/42 Physical interface: ge-0/0/42, Enabled, ...
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1answer
48 views

How can I make an ACL list work within a LAN? [closed]

I added an ACL list to Router A and permission is working fine if the packet comes from another LAN. The problem is, when a Packet is sent within the LAN that is connected to Router A, the packet is ...
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0answers
17 views

Some devices cannot communicate through switch

I have several mini-computers behind a TrendNet TEG 2248WS (48-port web managed switch). I have no problems with a good portion of my devices. However every OrangePi device does not communicate ...
0
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1answer
42 views

Configuring Juniper EX2200 Ethernet-Switching

Recently I started configuring an Juniper EX2200 to be used with an fibre optic connection in it's SFP module. The switch itself is online and can ping remote hosts without an issue after setting the ...
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0answers
66 views

Cisco Switch QoS for Voice

I have a Cisco 300 switch where I am using IOS/CLI to configure Quality of Service. The goal is to make sure that voice traffic is always prioritized over data. When I go in to configure the policy ...
1
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1answer
61 views

Is a two-way communication possible over a mirror port?

I have a network like this: Server -- Router -- PCs I'd like to add a Raspberry to it so that it receives all packets sent from the Server to any PC, analyzes them, and sometimes it also sends some ...
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0answers
60 views

Multicasting on a network of switches

I'm a newbie in terms of networking and have been working on a simple multicast networking project for my under-grad. The scenario is that I have to send multicast messages in my campus network which ...
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1answer
70 views

Configuring Data and Voice VLAN Cisco SG300

I have a Cisco SG300 managed switch I am attempting to configure to handle two VLANs one for data (VLAN1) and another for voice (VLAN20). Ports 1 and 52 are configured to trunk to the router/...
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2answers
60 views

Are there any types of switches that allow you to set custom network speed on their ports? [closed]

I know there are managed switches out there that allow you to hardcode the speed of their ports to 10/100/1000 Mb per second. But what if I want to set the speed to only 1 Mb per second or perhaps ...
2
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1answer
52 views

Can a router route local traffic through the WAN side to an AP bridge via VLANS on a switch?

I've been researching VLANs and advanced network setups, and I'm wondering if this could work. WAN | Switch (VLAN and QoS for ISP) | \ Gateway router Router(AP bridge mode) | ...
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1answer
36 views

Correct way of setting up network teaming for maximum throughput in Windows Server

We have a backup server with 4x1GB NICs. All 4 NICs are configures as a single Team (Switch Independent, Dynamic). NIC 1-2 are connected to SW01, NIC 3-4 are connected to SW02 and the switches are ...
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2answers
42 views

How to isolate group from computers by L3 switch from certain www

There is a broken switch to replace and I need to buy new one. I decide on this model: https://www.linksys.com/us/p/P-LGS528/ Is it possible to isolate 24 computers that are connected to this switch ...
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2answers
37 views

Moving from a dual ISP set up to a single ISP facility with mixed IP handling (DHCP with Static IPs)

First time posting a question here, please bear with me. I've been assigned to manage the migration of all our computers and servers from a facility where we have 2 ISP's to a facility where we're ...
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0answers
37 views

How to set the mode of port? access, trunk, general

I tried to set (change) the mode of my port, and I read the book and followed it step by step. But I still get a lot of error. There were what I input. (Routing) (Interface 0/3)#switchport mode ...
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1answer
583 views

EdgeRouter X as VLAN-only Switch

The Ubiquiti EdgeRouter X (ERX) has a switching chip on board so that it can be used as an L3 switch instead of as a router. I have another router, we'll call it router-core, which is serving an ...
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0answers
37 views

Can't access some MIB subtrees in a 3COM 4500G switch

I am trying to monitor the memory and CPU usage of a 3com 4500G switch via SNMP. I have found in other answers the proper OIDs (e.g. 1.3.6.1.4.1.43.45.1.6.1.1.1.3 for the 1 min. CPU load), but ...
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0answers
37 views

Cisco SNMP vmVlan OID result

I sent vmVlan (1.3.6.1.4.1.9.9.68.1.2.2.1.2) OID to a Cisco 3750 switch. This is list of vlans: Take care of interface FastEthernet 2/0/45 - 48. These interfaces isn't in response list of vmVlan. ...
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1answer
51 views

Had cat5e cable and got 1000mbps, upgraded segment of it to cat6, now limited to 100mbps [closed]

I have a setup in my home that goes something like this: [cable modem] -> [Netgear Gigabit switch UPSTAIRS] -> [Netgear Gigabit Switch DOWNSTAIRS] -> [Netgear Gigabit Switch OFFICE] -> [My PC] Now, ...
0
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1answer
39 views

intermittent drops on switches

I have a lab environment with 7 48-port switches (Ubiquiti ES-48-500W). All of them are connected to 3 16-port aggregation switches (Ubiquiti ES-16-XG) via fiber. All of the switches are brand new, ...
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2answers
131 views

Weird routing behavior between 2 Subnets

I have two Subnets and the Routing works like this: Client A can Ping (ICMP) Client B Client B can't Ping (ICMP) Client A There are no Routes manually configured in the Access Point (Google Wifi ...
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1answer
52 views

DHCP snooping - my clients dont get ip from dhcp

Why the PCs don't get ip from Core switch Dhcp pool? without dhcp snopping there is no problem, but when i enable dhcp snooping clients stoping to get ip from dhcp. This is my topology: topology ...
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1answer
67 views

Why do I need to configure a Trunk port?

I am relatively new to networking; I love to learn, but like to firmly grasp a concept before I move on. This being said, I researched what a trunk port is and I found this definition: [It ...
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0answers
28 views

Cisco Serial Connection issue

So I have been trying to get into my Cisco switch without the password, which involved power cycling the switch and pressing the mode button, prior to doing this I was able to type in Putty console ...
1
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1answer
37 views

HP Procurve STP Path Blocking

I have four Switches that are interconnected with each other, witch form a loop as shown in this network diagram The switch 1 is the root bridge and is connected to the primary edge router. The ...
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1answer
412 views

Setting up pfSense to bridge LAN NICs and connect WAN

I have a machine with four NICs (physical ethernet ports) and I'd like to set up a fully updated pfSense on it. So far it looks like this: A few things I've done so far: I've set up the bridge ("...
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0answers
48 views

Cisco Catalyst 3750G series PoE-48 - Private VLAN

I'm working on a Cisco Configuration for the first time and I've run into a problem where the Vlans do not appear to be working correctly, the ports on the switch should be configured to the ...
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0answers
69 views

sendip IPv6 ICMP ff02::16

I would like to send the following packet out with the sendip program (or any other program): IPv6, destination address: FF02::16, source address: (mine) ICMPv6, type: 143 (Multicast Listener Report ...
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2answers
66 views

How can I find IP/web console for a wireless AP

I have a Dlink DWL-2600AP, it is working but I'd like to do some troubleshooting on it (it's acting as if client isolation has magically turned on after 2 years, which is a problem for our wireless ...
0
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1answer
33 views

Can't set HPE BootRom password on newer versions

Could someone please explain to me where can I find option to set BootRom password in newer Comware switch like HP 3600 v2? The menu looks like this: 1. Download application file to flash 2. Select ...
0
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1answer
13 views

Bonding SWITCH XS (incoming packets)

I would like to bound 2x10Gb/s of a Linux server to receive/inbound more than 10Gb/s on a virtual interface send by a unique client. The client will probably send more than 10Gb/s (probably bonded ...
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0answers
89 views

Weird networking behavior with a gateway between a switch and CMC module, on Dell VRTX equipment. Am I doing something wrong?

Network Diagram: Here's the simplest way I know how to explain how the internal networking of this Dell VRTX works. So, you have your 4 blades and your network switch module that have integrated ...
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0answers
53 views

Ansible ios_l2_interface Error - Does not recognize interface as Layer 2

when I execute the ios_l2_interface module against a Cisco (IOS 12.2(55)SE) switch I get the following: ansible all -m ios_l2_interface -a"name='FastEthernet1/0/19' mode=access access_vlan=1" -i ...
1
vote
1answer
166 views

Cisco 3850 All ports turns amber when SFP inserted

We have replaced old 3750 switches with WS-C3850-24T (Qty:2 in stack mode). Whenever I insert any SFP module to connect our different depts, all ports turns amber for few seconds, during this phase ...
2
votes
1answer
120 views

Is IPv6 MLD snooping performed by Layer2 Switches over solicited-node multicast addresses?

The NDP protocol makes use of the solicited-node multicast address. A host joins its own solicited-node multicast address group both localy (netsh int ipv6 show joins) and on the layer2 domain (a ...
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0answers
73 views

Cisco 887va VDSL2 with public static /29 net and 2 vlans

I've a working config that allow internet traffic trought a firewall that is direct connected to 887 fa3 (vlan2 - public ip). Now I would to connect a "guest" wireless network that has to bypass ...
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3answers
5k views

Cannot ssh into cisco switch: Invalid key length

For some reason I cannot ssh into a Cisco Catalyst C3750 Switch. This is the error message, that I get: ssh_dispatch_run_fatal: Connection to 192.168.7.6 port 22: Invalid key length This is the ...
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votes
2answers
30 views

how to configure network in cisco routing and switching?

I am working at hotel and resort, and I want to build network for the hotel using cisco router and switch. the hotel customers number is up to 100 per day and there is 50 rooms. but i want to know ...
0
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1answer
102 views

LAN cable operation to switch internet line on L2 SW cascade connection

We have 2 internet lines A and B, and 2 independent network segments on the lines. All PCs are connected to L2 switches (SWAA, SWAB, ..., SWBA, SWBB, ...), and the switches are connected to another ...
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2answers
88 views

Combine two ports into one

I have a Cable Modem which an approx. 1200 Mbit download speed connection to the internet. Unfortunately the modem splits the download into across ethernet ports - i.e. 600 MBit each. The Cable Model ...