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Questions tagged [switch]

For questions about network switches, the term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model.

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Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems?

Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems? Please, refer to the attached drawing. What are the equivalent Cisco Switches ...
2
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1answer
44 views

InterVLAN routing issue

I've got one L3 Quanta switch. Having a bit of trouble in understanding the right way to configure VLANs and inter-VLAN routing on it. Routing on the switch is enabled. Ports 0/3 - 0/40 are ...
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0answers
41 views

Block internet on a Cisco catalyst 3560 port

Good day Is there a way to block a specific port in a Cisco Catalyst 3560 switch to block the user from accessing the internet but still have full access to the internal corporate resources. The ...
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0answers
24 views

Allied Telesis AT-FS750 MAC authorization with FreeRadius

It is possible to configure mac based authorization with FreeRadius on AT-FS750? We need block device in our network with unknown MAC address. Or set limited access with specify quest VLAN.
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2answers
57 views

Fastest spanning tree in multiple-ring topology

I have a topology in which there is a main ring and some nodes in the main ring have a minor ring. 1- which STP configuration has the fastest convergence time? How would you configure spanning tree ...
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0answers
8 views

how to access a switch from a tplink router? [on hold]

I want to access a switch, my pc is connected with a wireless then it connected with a switch, I want to access this switch, how can I do it. please explain to me, which tool I need. Thanks.
2
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1answer
26 views

HPE IRF Stack why do I need two physical ports?

I'm building exactly the same topology, but there is no explanation why do I need two physical interfaces in IRF stack? So, can someone please explain me, why do I need two physical members in IRF ...
5
votes
2answers
161 views

How to display entire MAC address table on HP switches

I want to display the whole MAC address table without needing to press 'space' for the next page, so that if there are 50 entries in the table I'd be able to view them with a single command. I'm ...
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3answers
2k views

I have a single ethernet switch. Should I use spanning tree?

I have a single ethernet switch. Should I use spanning tree? If there is a redundant link, definitely need to enable STP. In a single switch, how is it possible to have a redundant link? Any other ...
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0answers
26 views

Why use 2 switches with the same VLAN [closed]

One of the cisco labs ask you to configures 1 pc to 1 switch and another pc to another switch and connect the switches together. Both of these have the same vlan, allowing the pc's to talk to one ...
2
votes
2answers
122 views

QoS for OSPF, VOICE and CRITICAL Traffic

I plan to implement the QoS policy below. The target is to garantee bandwidth to VOICE and CRITICAL traffic. It should be 1/3 for Voice and Video, 1/3 for Business Critical traffic, 1/3 for all the ...
2
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1answer
32 views

inconsistent bad mask error

in packet tracer i was assigning: 83.174.16.164 255.255.255.248 to 3560 switch which shouldn't throw an error of bad mask given that it is in the usable range: Address: 83.174.16.160 ...
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1answer
31 views

Brocade smooth reboot command

I am newbie regarding switches. I have Brocade ICX 7250 and 7450. I would like to know, what is the command for smooth reboot of switch. I do not want to unplug power cable and lost configuration. I ...
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0answers
25 views

Unable to SSH into switch: Key exchange or Algorithm Negotiation failed [closed]

I am having a D-link 1510-28 switch to which I am trying to SSH into. Upon trying the command: srajan@srajan-Virtual-Machine:~$ ssh admin@10.82.64.5 Unable to negotiate with 10.82.64.5 port 22: no ...
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0answers
17 views

reset DAX switch

I have been working on configuring a network switch from DAX networks for my under-grad project. The model is DX-5048gs to be precise. The previous user has lost the credential for accessing the ...
3
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3answers
234 views

Switch and mac address table

I thought that a switch learnt the mac addresses by the computers sending out packets. However when I configured 2 switches, and 2 pc's, 1 pc connected to 1 switch, the other pc connected to the other ...
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1answer
34 views

Textbook has different order of commands: login password password-value and also password password-value login Does the order matter?

Textbook has different order of commands: login password password-value and also password password-value login Does the order matter? Cisco switch
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1answer
58 views

Port security on a cisco switch - predefined source MAC address and maximum number of MAC addresses

With port security on a Cisco switch, if you configure 1 source MAC address, does that also set the maximum MAC addresses to only one?
1
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1answer
43 views

Right Cisco switch for iSCSI SAN network

I'm trying to revive this old HP P4500 Lefthand SAN and recover some data from it. There was a pair of Cisco switches configured for the SAN traffic. Those are no longer there. All I have access to ...
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0answers
25 views

Tracking on a Switch

Is there a way to track on a Cisco Switch (WS-C2960-24TT-L, IOS 12.2(25r)SEE) on interface states? I would like if an interface failed, for another to fail with it (err-disable, shutdown, whichever)....
1
vote
2answers
49 views

Which parts cost most of CPU and Memory resources in Router or Switch

I'm a new guy of enterprise network traffic optimization. I'm very curious why the enterprise Router or Switch so expensive. As in my mind the Router just look up route table (I guess it should be a ...
1
vote
2answers
30 views

Can Layer-2 Switch deal with different Segmented IP

I have the following question confused, we suppose: in my lab I have 10 linux servers and one layer-2 switch, I tried to separate them to 5 groups: Group one: 10.1.1.0/24 include server1(10.1.1.2),...
4
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3answers
620 views

Understanding hubs and switches

Newbie here. I'm trying to understand how hubs and switches work. I read that hubs only forwards to all ports but a switch only forwards to the port it needs to. So, If I connect 3 computers to the ...
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1answer
35 views

Broadcast domains switches

If I connect 3 computers to the same switch and used one of the PC's to ping another PC on the switch will this cause a broadcast domain as they are connected to the same switch?
1
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1answer
35 views

One Fiber Optic Line 24 Cores for Multiple Services Transmission

Hello we have a construction project for building a compound of 50+ villas. The aim is build and connect the villas all together transmitting all services through the fiber optic. The services ...
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2answers
55 views

Mgmt Vlan vs other SVI s

Think of a layer 3 switch. Assume that we have a management vlan and a mgmt vlan interface. And we have other svi's on the switch. The question is this. I know that mgmt vlan is for telnet/ssh, simply ...
2
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1answer
58 views

How to connect a switch with a router via another switch?

ROUTER CONFIG Router#sh run Building configuration... Current configuration : 769 bytes ! version 12.4 no service timestamps log datetime msec no service timestamps debug datetime msec no service ...
4
votes
1answer
112 views

What are reasons to configure a Voice VLAN using the Auxillary VLAN feature instead of a Trunk + Native vLAN

Imagine this topology: [PC] ------- [VOIP Phone] ------- [eth0/0 on a Switch] And this configuration on the switch: vlan 22 name DATA vlan 33 name VOICE There are two ways to have both the PC'...
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1answer
42 views

Finding the IP address of a Cisco 3750G

Hello i have a Cisco 3750G switch and i need to find the IP address and I dont have a serial cable, so I need the IP address to login into the web-interface. Does it need to be connected to a network? ...
0
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2answers
33 views

Stack network power transfer

i have 2 cisco catalyst 3750G's, and a stack cable a have a question about the stack does is transfer power so do i only need 1 power cable or 2 and is there a way to reset the password without a ...
1
vote
1answer
117 views

How does ARP work on multilayer (Cisco) switches

I'm going to develop an example scenario here: There is a computer that is connected to an interface on the switch that has been assigned VLAN2 and another computer on an interface that has been ...
0
votes
1answer
39 views

Private IP vs MAC

What I know is that when we connect to another IP, our Public IP gets shared to the outside world, and when they address us they use our Public IP (gateway), and then the gateway directs the ...
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2answers
52 views

HSRP limitations on Catalyst 3560

I have read all of the documentation so many times that I put myself into a headspin. Now the sentences I read don't make any sense. What exactly is the HSRP limitation on Cisco Catalyst 3560 ...
1
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1answer
35 views

How can I configure link aggregation/bonded LAN for my simple Ubuntu router build? [closed]

I'm spinning out on this one...! Someone please help! I followed this fab tutorial below to make my own Ubuntu based router: How to build a simple router Ubuntu Server 18.04 Which works great using ...
2
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2answers
32 views

LANs with no router,just a switch(or hub)

Can a LAN be implemented just with a switch? If so,how is the communication completed?just by MAC addresses? When sending a frame from the source to the destination,and inbetween there is a switch,...
3
votes
1answer
130 views

Cisco ARP cache rewrites?

I know that the Cisco's default ARP entry expiration is 240 minutes, however how does the ARP table mechanism work when a different MAC address is seen using the same IP? In other words, if I move ...
2
votes
2answers
41 views

Bridge 2 VLANs using layer 2 device

This is a screenshot from a Cisco book. It says that 2 VLANs can be bridged using some L2 device also. As far as I know it is possible only by using some L3 device. Can someone please explain it how 2 ...
4
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2answers
238 views

Network Redundancy with LACP Trunking

I would like to set up a redundant link between two switches. I have four ports available to accomplish this. Scenario A: Switch 1 has ports 1+2 trunked together via LACP. They are plugged into ...
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1answer
48 views

missing Packet tracer physical Tab

hello I am using packet tracer for a while.I use in my college computer. but recently I installed in my pc. when ever I try to add extra ports in my rouer or switch the physical tab is missing
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2answers
110 views

Nexus 3172T MTU

I am attempting to set the L3 mtu on a Nexus port. The mtu option is only available if I set "no switchport" which then prevents me configuring VLAN related settings. Am I missing something obvious? ...
4
votes
1answer
32 views

Junos how to execute a lot of repetitive commands?

In my Juniper qfx Switch, I want to execute many commands such as bellow: set vlans vlan77 vlan-id 77 set vlans vlan77 l3-interface irb.77 set vlans vlan78 vlan-id 78 set vlans vlan78 l3-interface ...
1
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1answer
31 views

Physical labeling of switches and patch bays

This has to do with the physical install of network equipment, if there is a better place to ask please let me know. How do you physically label your switches and patch panels? I'm having trouble ...
0
votes
1answer
50 views

will wireless devices' MAC address be saved on layer 2 switch?

So I know that basically switches work like this (assuming 2 PCs are connected via Ethernet port) - the switch will store the mapping of the 2 PCs' MAC address and the switch ports in which they ...
0
votes
1answer
19 views

The Egress to switch port is direction a or direction b?

I have a doubt about the switch port Egress direction and Ingress direction. you see the upper have Egress rate limit. I want to know the Egress to switch port is direction a or direction b?
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1answer
32 views

Login local , login synchronous

I dont understand what those two comands mean when im enabling ssh on Vty-line. Can someone please explaim me please whatthose comand do and why i need to use them?
1
vote
1answer
31 views

I limit the port INGRESS but get packet loss

I use the limit speed method to limit the Juniper Switch port EGRESS and INGRESS speed. but after I added the INGRESS filter to my port, there will loss packets on the switch every port. anybody ...
1
vote
1answer
42 views

What does the speed of Network Switch actually mean?

Network switches usually come in speeds of 10/100/1000 Mbps, and that's all fine and dandy, then I got thinking.. Suppose I have an 8 port 1000 Mbps switch, each port connected to a client. If a ...
2
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1answer
49 views

Switch 2960, Router 2901, Layer 3 switch 3560 manual reboot query

I'm learning networking. I had however a doubt is there a way to manually reboot the above switches and routers besides the command line? By maybe unplugging and plugging the equipment quickly or a ...
3
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1answer
31 views

Ability to monitor all broadcast domains

Example: Network of company A has 5 VLANs: Accounting, IT, Guests, Servers, Board. All VLANs has DHCP servers enabled in their own VLANs. I am monitoring a single VLAN for DHCP packets by connecting ...
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1answer
30 views

How cable connects to server if routers and switches are virtualized

Looking here for an example, I see: Spine Device Interface Summary As previously stated, the validated design includes up to 4 spine devices and up to 96 leaf devices that are interconnected by ...