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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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1answer
8 views

How to differentiate if a Cisco device is a L3 switch or a Router?

I need to check all the L3 switches if they are configured with same ospf ID, As i am doing it in the Cisco prime, there are routers in the inventory too. Is there a show command where i can clearly ...
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9 views

how does a program detect an ethernet switch change? [on hold]

I am trying to change an ethernet switch on a system.I configured the switch to match the network settings and The network seems to work and data is still transmitted between the other devices via the ...
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1answer
23 views

Ubiquiti APs on manged or unmanaged switch?

I have three APs, one UAP-AC-IW and two UAP-AC-LITE. I have a Netgear Smart Managed Plus Switch, mainly for VLANs with plenty of open ports. I need to either add an unmanaged POE switch or a POE ...
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37 views

How to overcome my ISP router limitations (1Gbps ports on 2Gbps connection)? [on hold]

Here is my problem : I recently switched to the quickest ISP available in my region : Orange. It offers 2Gb/s FTTH internet connection, but the crappy provided router 'Livebox 5' only has 4 gigabit ...
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2answers
124 views

Industrial Ethernet network design

looking for some advice on network architecture for an industrial switchroom with several constraints. Modbus TCP devices are located in motor control centre cells, these need to connect to the ...
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3answers
429 views

LACPDU packets to pass through unmanaged switch

I have two buildings connected through the CAT6 cable and both ends have cisco-sg350 (capable of etherchannel). Due to the limitations of the cable both the switches are connected through a unmanaged ...
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1answer
30 views

Does Network segmentation work using different switches connecting to router?

I just learnt basic networking. If I have 2 departments which I do not want them to access each other's networks, does using two layer 2 switches connecting to the router does the job or do I need a ...
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1answer
14 views

Can not undo startup system-software of a Huawei quidway switch

I follow this article: In the _hide, I can not undo startup system-software: [-LW-A]undo startup system-software ^ Error:Unrecognized command found at '^' position. the ...
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1answer
34 views

How to download the VRP?

in the flash:/ directory, there have so many files: <Z306-LW-A>dir Directory of flash:/ Idx Attr Size(Byte) Date Time FileName 0 -rw- 1,419 Dec 12 2009 03:...
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1answer
37 views

Why I can not sftp into the huawei switch

I have HUAWEI S2300 Switch, this is my configuration: [HUAWEI-A]dis current-configuration # !Software Version V100R005C01 sysname HUAWEI-A # FTP server enable # vlan batch 1 to 4 7 to 8 # ...
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2answers
45 views

Does a SFP port indicator goes on when receiving or transmitting or both

My questions are on the bottom, feel free to skip my debugging story if you're in a hurry. Story I started to check a network spanning tree status. All switches are connected on fiber, through SFP ...
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1answer
70 views

Cannot Connect to one single ip address in VLAN

I have 3650 Switch which contain number of VLAN and I am unable to connect to one ip address from specific VLAN. But routing is properly configured and there is no ACL applied. Even end device has no ...
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3answers
68 views

Access a pc web service with different ip/mask in on-site network

I tried to get a setup working to make the following scenario work: Access a pc web service hosted in a different IP range/mask than the rest on-site PCs. Details: We have a network setup with a ...
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2answers
51 views

How can I connect (stack) two Cisco SG350 together?

I am building a storage network, physically separated from the data network. I have two Cisco SG350-28P-K9 V02 switches: One on the basement. Has two NAS, two ESX servers. (in use) One on the 4th ...
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0answers
18 views

The huawei S2300's interface protocol become `--`

The huawei S2300's interface protocol become --: <HW>dis interface brief *down: administratively down ...
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1answer
24 views

Is it possible to query interface statistics bytes by given start time to end time in Juniper Device?

I can query a interface detail: admin@Juniper-EX# run show interfaces ge-0/0/1 detail Physical interface: ge-0/0/1, Enabled, Physical link is Down Interface index: 131, SNMP ifIndex: 504, ...
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1answer
28 views

Jumbo frame problem when using switch

I have two GigE cameras. I use 4 frame per second for capturing. Each frame of first camera is 2.3MB. Each frame of second camera is 1.8MB. So in a second I use 4 * 4.1 = 16.4 MB = 131 Mb of bandwidth....
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1answer
44 views

Is this device a network hub? [closed]

Due to the space limitation of the conduit, I ran a single cable from the switch to my room, and intended to run 2 separate fast Ethernet lines on it (4 wires each). I bought this thing from China for ...
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0answers
22 views

Getting less pings received than expected when using port mirroring

I have put port monitoring on a cisco 2960 switch Switch(config)#monitor session 1 source interface fastEthernet 0/1 - 23 rx Switch(config)#monitor session 1 destination interface fastEthernet 0/24 ...
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2answers
1k views

How many stack cables would be needed if we want to stack two 3850 switches

How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be ...
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0answers
30 views

How to analysis the below situation, is the too many switch trunk connect caused this issue?

I have two Juniper EX switches, and the Juniper-EX-01(ge-0/1/1) connected to the Juniper-EX-02(ge-0/1/0). I want to check is there any optical attenuation problem, or other link errors. admin@...
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1answer
29 views

How to trace the MAC route? [duplicate]

If there have several Switches, they are connected using trunk, and in the end switch there is server on it. So, if there is a controller server on the other end. if the controller trace to the end ...
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2answers
58 views

Using different speed in switch ports?

Is it legal to use different Ethernet speed in the different ports of a network switch ? For example, one port will be connected to a PC in 1G, and another port connected to another PC in 100M ?
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1answer
67 views

How to filter the physical port of the switch through snmp?

I tried using snmp to get ifdescr, I think the interface name containing Ethernet might be a physical port, but I am not sure. In addition, the interface in dot3StatsIndex is also like a physical ...
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1answer
60 views

configure IPv6 ACL on interface WS-C3750X-48

I am using  WS-C3750X-48 model switch. license is lanbase. I have activated cmd on my switch: sdm prefer dual-ipv4-and-ipv6 routing. Then i did reload. After that, i will able to config IPv6 on ...
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1answer
54 views

How do VLANs Work? Some Basic Questions:

I've recently started looking into VLANs. I am a network novice so bear with me please:). I have a few questions regarding VLANs. I understand that certain managed switches allow you to create VLANs. ...
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1answer
35 views

Korenix Switch JetNet 4508v2 SSH Problem

Does anybody know, or has anybody worked with Korenix JetNet 4508v2? This Switch has a very important Bug in the Firmware. SSH is working fine, but for a period of time. Then, ssh is not working ...
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2answers
67 views

Can a router route 2 switches with multiple vlans and subnets

Good afternoon/evening, Today on my Cisco Packet Tracer, I made two layer 2 switches and 2 PCs on each switch. I created a vlan 10 on the switches. I trunked the switches together so they can see ...
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0answers
24 views

Dell PowerSwitch S4810 - Cumulus Linux password reset not working

I’m trying to login to a Dell S4810-ON and the default username/passwords are not working ([https://support.cumulusnetworks.com/hc/en-us/articles/201787646-What-is-the-Default-User-Name-and-Password-...
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1answer
44 views

Do I need to configure a managed switch if I want to use it as unmanaged?

I'm a bit confused with the whole managed switch setup. I understand from a friend that if I want to use a managed as an unmanaged switch, I just need to use it directly out of the box without any ...
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3answers
68 views

Bridges, hubs, switches and repeaters in subnetting

I'm learning to subnet and I'm constantly doing exercises on paper about this topic. I'm trying to breakdown a network into smaller subnets, given the number of hosts for each one. For now, I only ...
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1answer
82 views

dhcp client not receving the ip address using two switches

1) In Router 4(R4) i have configured the 2 dhcp pool. first dhcp pool with ip address 150.10.10.0/24 and second one with 150.20.10.1/24 in subinterfaces f0/0.1 and f0/0.2 and encapsulated using (R4(...
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2answers
83 views

How is Ethernet a packet-switched network?

Let's say for example there is an Ethernet switch, and there are four PCs connected to this switch. PC1 and PC2 are communicating with each other, and at the same time PC3 and PC4 are also ...
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0answers
13 views

Why we need routers when there is layer 3 switches [duplicate]

I know that routers only do routing but layer 3 switches can do both switching and routing. my question is why we still need routers when we have layer 3 switches ?
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2answers
40 views

Using 2 different ISP In case one dies

It's my first ever post in here and I hope not the last. I'm looking for some advice. I'm trying to reduce my internet downtime for a local network. My setup. Mix and match computer environment (...
2
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1answer
58 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 ...
0
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1answer
22 views

Broadcast Timer [duplicate]

This question is regarding in the process of L2 MAC Address learning. As we know, if a sender sends a packet to some receiver host which switch doesn't know, it will broadcast for learning. Assume an ...
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1answer
76 views

Ping across VLANs using layer 2 switch

I'm trying to ping one PC on one particular VLAN (VLAN 80) from another PC on a different VLAN (VLAN 50). I have a layer 2 switch (Cisco 2950T), so I can't do it from within itself. How would I be ...
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3answers
98 views

How do devices connected to a switch get their IPs?

It should go without saying, I'm all new to networking and there is plenty I need and want to learn about. One of the things I'm not clear on and couldn't find a satisfying answer to, although I've ...
0
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1answer
43 views

Why Meraki Switches have DNS defined in their settings?

What a Meraki switch would do with DNS? switching has nothing to do with Domain name resolution.. the only thing I can come up with, is that their switches probably using some type of domain address ...
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1answer
68 views

Two switches, one uplink - best way to link them?

Overview I have two Arista 7050SX switches. They don't support stacking. But I essentially will be using them as a stacked pair none the less (just means managing two individual switches). They're ...
0
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1answer
51 views

I need help in creating OSPF between MultiLayerSwitch and Routers in packet tracer

I know we cannot create OSPF with different subnets. What network addresses should I put in the MLS and R1 to make it adjacent? Here's the configuration for MLS: interface FastEthernet0/15 no ...
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2answers
844 views

Why I have higher ping to the VLAN interface than to other local interfaces

I wouldn't call it an issue, but I'm curious. On our Quanta switch we have a couple of VLANs and vlan interfaces accordingly. Let's say I'm on a computer in VLAN 10, if I do: ping 192.168.10.1 ...
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1answer
48 views

Arista switch - getting chassis ID of currently logged in switch

I can not find how can i check local switch Chassis ID. here i found that command: show lldp local-info management 1 should show me what i want but there is no "local-info" option. Is there any ...
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2answers
89 views

Is this scheme- An Ip camera network completely isolated from rest of Intranet

IP camera network completely isolated from rest of the Intranet work and for connecting each IP camera at mutually 900 m TO 1.5 km distanc to switch near NVR about 800 to 1.5 km from each IP camera ...
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1answer
27 views

HSRP - How do I know the hostname of the standby router

How do I know the hostname of the standby router if I don't have a topology drawing? ''' Vlan190 - Group 0 State is Active 2 state changes, last state change 1w5d Virtual IP address is 172....
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1answer
152 views

Aruba switch — rate limiting causing TCP packet reordering?

We just finished debugging a really interesting bandwidth problem on intercontinental WAN links aggregated by Aruba switches. According to tcpdump captures, using a rate limiter of any speed on a ...
2
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0answers
53 views

C2960 - Memory has insufficient capacity

Please, do you know if there is any way on how to release more processor memory from a C2960 switch without restarting it? I am receiving an insufficient memory alarm from this switch. I noticed that ...
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1answer
40 views

How to make a printer visible to two different subnets?

How are you? I hope well. As you can see by the tittle I'm in the middle of a situation that i have to access a print in another subnet. These subnets are operating in different switches(Switch A and ...
1
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1answer
66 views

Any expected issues with stack of 8 Cisco 3750X switches?

I am planning the network for our new offices this time utilising Cisco 3750X's (WS-C3750X-48P-S). The required port count has gone up and up so have had to procure some extra switches to bring the ...