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Questions tagged [switch]

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

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1answer
28 views

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

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
15 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 ...
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0answers
36 views

There is an ARP address but I can not ping it

I have a Server under the Router, you can see the two IP addresses in the snapshot 141 are compatible, but the 140 one is incompatible from my Router because they are in the Server's same Interface. ...
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1answer
24 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
28 views

Sharing a single Internet connection into multiple networks [closed]

I am looking for advice on what equipment to buy, and proper configuration for the following scenario: A small business has a single 1Gb/s Internet connection (no router). The company has 20 small ...
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0answers
17 views

NIC and USB Ethernet Adaptor, can both have the same MAC address? [duplicate]

The coonection goes like this: Switch + Usb Ethernet Adapter + PC I want internet connection to go from switch to USB in order to liberate Ethernet Port for other use. Could there be internet ...
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0answers
54 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 ...
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1answer
52 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
52 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
22 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
59 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
42 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
29 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
33 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
30 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
33 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
273 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
27 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
29 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. ...
0
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1answer
48 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, ...
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1answer
34 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
127 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
49 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
52 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
28 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
239 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
36 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 ...
1
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0answers
58 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
52 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 ...
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1answer
28 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 ...
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1answer
12 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
81 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
44 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 ...
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1answer
137 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
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1answer
105 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
63 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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2answers
3k 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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2answers
28 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 ...
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1answer
98 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
82 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 ...
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1answer
18 views

Isolating traffic between devices connected to same AP

I have multiple access points. Every AP has two configured SSIDs: one for clients devices (open) and one for some utility devices that will be used by clients devices (secured). I would like the ...
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votes
1answer
51 views

Netgear Switch: equivalent for Cisco “Link State Tracking”/HP “Smartlink”

Cisco Switches implement a system called "Link State Tracking" - one uplink port can be defined, and mutliple downlink ports can be defined that use the uplink port. If the uplink port goes down (...
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1answer
61 views

VLAN/Subnet Design

I am trying to get my head around the practical implementation of VLANs/Subnets. I currently have 3 HP v1910 switches with the following subnets/VLANS; 192.168.20.0/24 Production Server (7 servers ...
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1answer
92 views

HPE 5820X Configure L3 Routing

I'm having some trouble configuring L3 routing on HPE 5820X. This is the first HPE switch I've worked with and would like some pointers on the commands to get this working. So far I have configured ...
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0answers
39 views

Error Message “Too many TCP connections” after connecting a industrial machine (Linux) to another switch in the same subnet

Our production department has an industial machine (Linux OS) that is connected to a patch panel via Cat 6 Cabel. From the patch panel another cabel (lets call it "Cabel Machine") goes into Switch A ...
1
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1answer
99 views

Juniper Switches: Extend network without adding new switches to virtual chassis

We have a virtual chassis composed of four EX-3300 48-port switches: One master, one backup, and two linecard, all located in the same LAN closet. All of the switches have uplinks to a Palo Alto PA-...
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0answers
65 views

Juniper EX4200 Routing Issue

I am trying to find out why this switch cannot see the gateway. LAN router/gateway is at 192.168.1.1/24 The uplink interface configured as follows > show configuration interfaces ge-0/0/0 unit 0 ...
0
votes
1answer
105 views

Bonding 802.3ad and HPE switches: ingress and egress traffic not in the same interface

I have LACP configured between my server (802.3ad, layer2, so based on source MAC and destination MAC) and my switch. Recently I saw that ingress traffic for a network peer is using one interface (...
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0answers
57 views

broadcast traffic in rrpp ring with huawei switches

Good Morning, I hav a ring network with 4 HUAWEI S2700 SWITCHES for clients and 2 HUAWEI S3700 switches for servers I am using rrpp protocol and I have disable stp in the port involved in the rrpp ...