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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Wired cable modem to wireless issue [closed]

I have a wired 2 port coda-45 cable modem that has a UI but there are no settings available for config, the ISP stuff all config settings over cable. I can get internet access connecting LAN port from ...
tony_felloni's user avatar
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1 answer
55 views

Layer 3 switch SVI and static ip confusion

I have not configured the network yet. Every vlan will have a different subnet. I want to assign ip addresses to the switches on the network from another subnet. How can i provide a default gateway ...
shiva13's user avatar
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How do you assign sequential IP addresses to individual ports on a switch? [duplicate]

I am looking for a non-complicated way to set up a network of 50 interchangeable devices such that whenever I plug a device into a specific port on a switch, I will always get the same IP address ...
Curtis's user avatar
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1 answer
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Layer 3 Switch IP Problem on Packet Tracer

I set up a network. It contains vlans. I assigned devices ip addresses from different subnets. I have 2 layer 3 switches to communicate them. I assigned switches ip addresses from different subnet. I ...
shiva13's user avatar
1 vote
2 answers
61 views

Inter-VLAN using L3 switch

There are 3 VLANs 10, 20 and 30 on these switchs. Everything such as VTP, DTP are working fine. The problem is that inter-VLAN seems not to work correctly. IP routing is activated on the L3SW (even ...
Gekko's user avatar
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1 answer
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How do layer 2 switches route based on MAC when daisy-chained?

Trying to think about this from a hardware design perspective, if I had to design an FPGA or a uC or something to manage a single port being the gateway port and one or more switched ports for routing,...
Qix - MONICA WAS MISTREATED's user avatar
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2 answers
23 views

RMA'ed device configuration [closed]

Just wondering what are the methods that you use when re-configuring an RMA'ed device. Do you manually configured all the script that runs on the device or is there any efficient ways configuring the ...
dlareg28's user avatar
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2 answers
81 views

Can wrong SFP module damage equipment?

SFP modules convert electrical data from the equipment to optical signals. There is no incoming power surging from an optical port to damage the equipment according to my undarstanding of fibre optics....
SandShriner's user avatar
1 vote
2 answers
95 views

Brocade 7450 - set MTU to 9000

I have brocade icx 7450. I already enabled jumbo frames to increase MTU packets on switch. But unfortunately I am not able to change MTU size of port which I want. When typing after choosing interface ...
Frihu's user avatar
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2 votes
2 answers
386 views

Switches in chain topology for ~40 devices

I am currently looking at a network topology consisting of ~40 DUTs. In this network, there is no hierarchy (like access core and distribution), and all the switches are connected in chain topology. ...
user1397215's user avatar
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2 answers
72 views

Can we have two logging source-interface configured on Cisco Switch?

I would like to understand if its possible for us to have two logging source-interface configured on Cisco Switch: logging source-interface vlan1 (For syslogs) logging source-interface vlan2 (For ...
Blake's user avatar
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Switch Configuration - Change the trunk allow VLAN

May i know any service interruption if i issue the command on changing the trunk allowed vlan on both end: switchport trunk allowed vlan 10, 20, 30 to switchport trunk allow vlan 10, 20, 30, 40
KKNg's user avatar
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1 answer
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enable https on Dell Networking N1548P

I am trying to enable https and disable http to make dell more secure. I am trying to generate self-sign certificate with these commands and having this error. (config)#crypto certificate 1 generate (...
hakkican's user avatar
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1 answer
79 views

Cisco port channel identification through SNMP

on a cisco switch is there any way to identify, through SNMP queries, which interfaces are involved and configured in a port channel? I did some experiment with commons MIB, without result. Any idea? ...
Gianluca's user avatar
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Does an SDN Controller need to be connected to every Openflow enabled Switch directly? [closed]

Is it possible that the network would still function if the SDN Controller was only connected to one Openflow Switch and every other Openflow switch would be connected to that switch someway? And if ...
fractal397's user avatar
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81 views

input discards on Arista 7124SX-F

im seeing input discards on one of our uplink on Arista SW if i run sh platform fm4000 interface ethernet 22 counters verbose command it is showing smp0DropPkts which is equal to the input discards. ...
user2714949's user avatar
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1 answer
63 views

Access multiple networks via one managed switch

We have a kind of granulated network structure. At the moment I have two network adapter connected to my system for two of the network areas. The Systems in network A and network B should not ...
MaKaNu's user avatar
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6 votes
5 answers
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How to solve problem with two devices with the same MAC address, connected to the switch?

I have two devices with the same MAC address (don't ask why, I can't solve it by replacing those devices or modifying MACs) connected to one switch. Of course both of them get the same IP from DHCP ...
Tomasz's user avatar
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2 answers
84 views

Streamlining Network Maintenance : Automated Remote Backups for Lenovo, Force10, and Dell Switches

Can these switches be backed up automatically and pushed to a remote server via FTP? I attempt to find a way to automate the process of creating periodic backups of switches and sending them to a ...
jrogers's user avatar
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3 answers
103 views

Direct connection slower than via switch

My office ISP provides a 1 GBPS connection. When I connect my laptop directly to the router provided by the ISP, and connect to fast.com, I get a speed of approximately 100 mbps. Our office network is ...
ranban282's user avatar
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1 answer
171 views

can a layer 2 switch block dhcp from 1 port, both in and out?

Here's what I want to do: "Wall" is the dhcp server from the ISP. "R" is my internal router. "L2" is a hypothetical switch. "fs" is my dhcp server. I want ...
user3303210's user avatar
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Why are connected switches not a good substitute for the network layer? [duplicate]

Unless I am missing something, because switches can be chained together, I am not sure why the network layer is needed. Theoretically, one can dedicate a frame to any MAC address, and assuming there ...
Aviv Aviv's user avatar
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3 votes
1 answer
52 views

How do communication networks physically direct traffic? [closed]

I’m curious as to how this would work. I have an ISP that uses Coaxial Cable to deliver its services (this company was one of the original cable TV providers in the neighbourhood, hence why coax and ...
StackQsUp's user avatar
1 vote
2 answers
58 views

How did ATM switches that were implemented in a core of IP network improve QoS and higher data rate?

How can ATM switch improve Quality of service and data rate just by incorporating them into the core of IP network? What was used in the sore of IP networks before ATM switches and what is used today ...
Vladimir Pejanovic's user avatar
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1 answer
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How can GMPLS unify signalization plain of all telecommunications network technologies?

In what way can GMPLS do that unification of signalization of network technologies, by hardware, like MPLS switches, or by network protocols? And what is the role of optical networks in GMPLS? Are ...
Vladimir Pejanovic's user avatar
3 votes
2 answers
151 views

Loops in an STP-enabled network - How?

I've got a question about STP/RSTP (it applies to both, but I'll just say STP). If I connect several switches and the STP algorithm eventually creates a loop-free environment, then how can a single ...
Attila M's user avatar
2 votes
1 answer
152 views

Support for 10GBase-T RJ45 SFP+ transceivers

Support for 10GBase-T RJ45 SFP+ transceivers in modern switches can be a hit and miss. What is the technical limitation as to why some switches don't support them? So far my understanding on the issue ...
GreenLantern22's user avatar
2 votes
1 answer
77 views

6125XLG blade switch IRF configuration in c7000 chassis

I have HPE c7000 chassis with 612XLG switches. I am trying to setup IRF between blades switches. somehow i am not able to bring up irf-port interface. In 6125XGL TE1/0/17-20 ports are internal ...
Satish's user avatar
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0 votes
3 answers
410 views

Finding what interface a MAC address is assigned to

I am currently on a Cisco 9410 and I ran a "sh mac address-table | i 5619" and I received " 13 fc3f.db4d.5619 DYNAMIC Po1". I just need assistance with finding what port/...
R3ne's user avatar
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2 answers
95 views

How is it technically possible for a straight-through cable to work?

I understand why two computers need a crossover cable between themselves to communicate. Without it, the transmit and receive wires are the same on each end, making any communication impossible. What ...
jrway's user avatar
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1 vote
2 answers
171 views

If there's a NAT-capable gateway between WAN and a switch, why is a switch helpful?

To preface this question, my question is somewhat related to what I'm trying to understand as the difference between layer 3 switches and routers. The main difference between the two is that layer 3 ...
itsmarziparzi's user avatar
1 vote
1 answer
128 views

If your ISP already has a gateway, why do you need another gateway with NAT to come before a layer 3 switch?

Please bear in mind that I am learning and have never set up a network with routers and switches myself. Also please bear this is sort of going to be loaded question because there are multiple layers ...
itsmarziparzi's user avatar
0 votes
2 answers
166 views

cut-through vs store-and-forward switching

Let's say we have a host A that is sending 1bit of data (I know it is impossible practically) at at rate of 1bps to host B. Host A and Host B are connected via 2 switches. We assume that the ...
tonyjk's user avatar
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0 answers
53 views

How bad is doing a back-to-back connection to do VLAN mapping (vlan-stacking limitation)?

the object sounds like a newbie questions but there are good reason for it in the context of bridge-domains and vlan-stacking. Here below a picture to give a bit of context In short I realized that ...
GooGoo's user avatar
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0 votes
1 answer
240 views

Cisco Switch vIOS-L2 in GNS3 and CCNA 200-301

I am reading a preparation book for the CCNA Test 200-301. Currently, I am reading a section about DHCP and VLAN interfaces in a switch. The book shows an example of configuring this. switch# ...
Diego Velasco's user avatar
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1 answer
88 views

Make printer in different subnet accessible to other subnet

i am creating a network and i want the printer which is in a different subnet to be accessible by all other subnets. The router network is 192.168.10.0/24 further subdivided into /28 subnets. The ...
digiadit's user avatar
0 votes
1 answer
320 views

Palo Alto 440 and FS 5860 Switches -- L2 Loop/Spanning-Tree issue

I have identified what seems to be a looping issue, due to STP not blocking an alternate path. As you can see in the diagram, ports Eth7 and Eth8 on the switches connect to the Active/Passive PA-440 ...
James's user avatar
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0 votes
1 answer
319 views

Bash script to gather serial numbers from list of cisco switches

I have pieced together a script to login to each switch listed in the file switch.txt, grab the serial number and place it with the IP address into the CSV serials.csv. The problem I am having is that ...
Matthew Cardinal's user avatar
0 votes
3 answers
117 views

One layer 2 switch in the middle of router network

In general, The connection should be like PC---SW---ROUTER---Many ISP router---Router---SW---PC so the packet will be from layer 2 ---layer 3---layer 2 What if I put one layer 2 switch in the network ...
jacky chong's user avatar
0 votes
2 answers
184 views

My PCs aren't able to ping each other successfully. Why? I think my Ip route is the problem? I am not sure

I have a topology of PCs A, B, D, and E, 2 routers R1 and R2, and 4 switches A, B, D, and E for each of my PCs respectively. PC A IP is 201.4.100.1/28 with a default gateway of 201.4.100.2, PC-B IP ...
NETFstudtNP's user avatar
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0 answers
71 views

I can no longer access my Dell EMC N1124T-on through its GUI interface

We configured and set up our Dell EMC with a Putty interface first and went through the Set up wizard and gave it a static IP. Then joined it to our network and Deployed it into our IDF. Accessed it ...
Ltjbuk09's user avatar
1 vote
2 answers
132 views

What components of a network switch qualify as ASICs?

While studying for CCNA, I came across the information that in a network device, say a switch, the CPU is responsible for the control and management planes work, while the actual data forwarding is ...
Marcus's user avatar
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1 answer
212 views

trying to ping 192.168.2.2 from 192.168.1.1 pcs

im trying to ping pc2 from pc0 and it doesn't work can anyone help tell me why? pc0 is 192.168.1.1/24 and pc2 is 192.168.2.2/24. The port connecting switch 0 is 192.168.1.100/24 and the port ...
potatoNetwork's user avatar
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2 answers
47 views

What command would let me know Which connection links are participating VLAN 2 spanning tree?

Which connection links are participating VLAN 2 spanning tree?
s3lectstar's user avatar
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0 answers
13 views

Get PTP time slippage between two differents devices PTP master

I have two GPS antenna pluged on two diferents PTP switch. Each switch are configured how grandmaster. My ideia is create two different time references synchronized. I need to know how I validate a ...
Arcaniaco's user avatar
  • 101
0 votes
4 answers
919 views

Communication between different VLANs

In my previous understanding, there is no way to communicate between two VLANs using only layer 2. After all, this is the purpose of having VLAN. I found a forum that claims the following. 1.VLANs can ...
jacky chong's user avatar
0 votes
2 answers
56 views

Static routing Cisco packet tracert

Im new with Packet Tracer, Regarding the problem of static routing, I have a question and want to ask, I simulated static routing of three L3 switches on packet tracert, Now, PC1 and PC2 can be ...
berniecheniitt 's user avatar
0 votes
1 answer
190 views

Why can't I enter privileged EXEC mode?

I created a network in Packet Tracer using 2 switches, 3 PCs and straight through cables. I have to create the following configuration for both switches: no ip domain-lookup service password-...
katerina's user avatar
0 votes
1 answer
84 views

High availability vs network mac/arp config

Currently I test firewall HA settings and we observe some delays despite its active/passive config. Usually there should not be any interruption.Vendor explains this based on some configuration MAC/...
hakkican's user avatar
  • 145
0 votes
1 answer
125 views

how to connect to Dell N1548P with ansible

I could not find ansible module specific to dell switches yet. Existing modules mostly refer to dell emc products. Thanks
hakkican's user avatar
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