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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In IP6 fe80::8a10:8fff:feb7:1632 > ff02::2: ICMP6, router solicitation , length 16

When I use command to capture the packages of interface ae52.0 in my EX4300 gateway Switch (L3): run monitor traffic interface ae52.0 I get many In IP6 fe80::8a10:8fff:feb7:1632 > ff02::2: ...
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9 views

What input misconfigurations exist in switch or router in Software Defined Network (SDN) based environment? [on hold]

I am looking for input misconfigurations that exist in switch /router in SDN based platform.
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Connect Brocade icx-7450 COM with laptop

I have brocade icx-7450 managed switch and need to configure it with packetfence server. Still I'm not able to connect to the switch. Tried with mini USB to USB, RJ45 and USB male-male cables.
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57 views

Is Spanning Tree Protocol Needed?

If there are two switches connected directly together with two links is spanning tree protocol needed? please see below snippet
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10 views

Bridging two NICs [on hold]

(I know next to nothing about networking, so bear with me.) I have a Linux board with two NICs. One will only be connected to another board, the other will connect to a network. I need to make the ...
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17 views

Two switches don`t ping [on hold]

I have two switches each configured two vlans vlan2 and vlan3.Vlan2 has port 1 tagged in both switches ip address also in one mask192.168.0.1/24.Vlan3 has port 1 untagged in both switches and ip ...
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1answer
42 views

ARP source address behind a switch

I have an ECU sending ARP request to another ECU destination and it's working fine. the problem arises when I use an automotive switch in between. the source IP address is 192.168.0.12 the switch ...
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1answer
50 views

What happens when a switch receives a packet with an unknown source MAC address?

The CAM table cannot be populated with the source address so other action must be taken. Is the switch going to drop the packet?
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31 views

Why my ae interface Link type is down but the physical interface is up?

Why my ae interface Link type is down but the physical interface is up? In my convergence layer Switch, I use two Juniper EX4300 devices realize the Stack: so there have xe-0/0/x and xe-1/0/x ...
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0answers
12 views

4 PCs in the LAN (with internet access) + 1 VM PC in the same LAN and internet access [closed]

I faced today a problem with setting up a working "work-place" with 4 PCs and one virtual machine placed on the one of the PCs. I managed to go through the connecting PCs through switch into the same ...
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1answer
102 views

Switching interface VLAN ID Mid-Production

I was wondering if there was a way to switch out the VLAN ID from VLAN1 to VLAN10 without impacting the connectivity of the end users? Can I simply copy and paste from one interface VLAN to another? ...
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1answer
36 views

Is it possible to differentiate cisco ports on monitoring system via snmp?

I am managing some cisco switches in my monitoring software (zabbix), and it provides useful insights that I would like to monitor: Warning on link up / down Warning when ports are on half duplex ...
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24 views

Does a Ubiquiti Switch require the use of a Ubiquiti Base Station? [closed]

So I have an Ethernet port that was recently installed in my apartment by my landlord. When plugging a router or a raspberry pi into the port, nothing happens. The blinking lights of my Ethernet port ...
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1answer
41 views

How to access a device connected in another switch, which is in another subnet? [closed]

As you can see by the title I'm facing a problem trying to access a device, a printer to be more specific, on another switch which is in another subnet. This is my first week in the new job and first ...
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70 views

Cisco nexus STP loopguard

I have cisco nexus switches in vPC and they are connected to HP c7000 blade center switches and all my c7000 blade server has Linux Bridge is running, i believe something went wrong somewhere in Linux ...
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1answer
67 views

How to firewall choose routing through ospf?

enter image description here i have this case:on firewall 1 and firewall 2 configure routing ospf and vrrp in the same time traffic go to internet through firewall 1, from firewall 1 routing to ...
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2answers
41 views

snmp server and/or switch, help [closed]

i own and have configured a c2950-24 L2 switch. upon starting it up it asked if i wanted to configure snmp. i followed threw some steps but i have no clue how to actually use snmp. my switch logs when ...
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1answer
65 views

Why STP has to be disable on Trunk Ports?

I have 5 Switches on a Private Network 10.0.0.0/8 with 8 Vlans. On Access ports is running Rapid STP. On Trunk Ports between Switches should i disable STP or not? I would be very pleased if someone ...
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2answers
66 views

Is a “LAN” a layer 2 or a layer 3 concept, in TCP/IP?

I think my question is purely theoretical and a matter of definitions; it derives from the fact that a L2-switch with VLAN capabilities is able to "create" different virtual LANs, and thus I am led to ...
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1answer
38 views

SNMP object not in the MIB

i'm working on an SNMP app that needs the ptopo MIB object with the object ID of 1.3.6.1.2.1.79 after enabling SNMP v3 on 2 layer 3 switches dell z9100-on brocade slx 9140 and creating a view on ...
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1answer
31 views

Getting Mulitple Source IP addressess when doing Port Monitoring

I have a Cisco 2960 switch that I'm trying to find which device IP address is connected to each port... My Setup: monitor session 1 source interface gigabitethernet 0/5 monitor session 1 destination ...
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1answer
75 views

Layer 2 and Layer 3 traffic with one cable

Hers the topology. L2 switch L3 switch Router There are 2 VLANs. One VLAN ends on the L3 switch 1 VLAN on the router. Here is the question. Can i connect the L3 switch and the router with just 1 ...
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1answer
22 views

Which path will frames prefer in this setup? [closed]

So I recently installed a long rj45 cable to replace the powerline adapter I was using. I'm keeping the PLA in place as a failover but wanted to know if I will need to swap the connection by hand to ...
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2answers
84 views

Troubles wiring two network rooms with optical fiber and SFP-enabled switches

I'm in charge of the new network installation in the new office of my company, and I have troubles wiring two network rooms (one for servers and incoming internet and the other one for wiring closets) ...
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19 views

factory reset without fail nvram

My problem is to reset the NVRAM without fail the flash memory. I try to recover password from NORTEL CORE SWITCH-8310 old model. I try to enter the monitor mode but I fail. PLZ suggest HOW to process ...
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18 views

Dell N-Series SNMP, Mac address table

I have already tried this: Using SNMP to retrieve the ARP and mac-address tables from a switch and various other approaches. I'm trying to do a walk on my Dell N2048P to retrieve all active mac-...
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2answers
84 views

How to ping router from L3 switch

I am stuck in that that switch can't ping router and router can't ping switch. How to fix that ? I tried so much variants but them didn't help me Actually router must do static routing, that i am ...
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1answer
56 views

Switch updating - Cisco Prime

I'm tasked with mass updating of our Cisco switches via Cisco Prime. Is it possible for the update to fail? Can the switch 'hang' in reboot loop? What if I tell Cisco prime to backup running image? ...
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21 views

Nortel L4 Switch 3408, Backup configuration to files

I need a solution for backup the "cfg & info dump" to files. To do this, there is a few information to be convinced that [/cfg/ptcfg command] include the [/info/dump]. So, do I just need to /cfg/...
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2answers
224 views

What are neighboring ports?

I know this is as basic as it gets but I can't find a direct answer to this question. Are they ports on two different switches (or routers) that are connected by a cable? Are they the ports ...
4
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1answer
77 views

Internet speed across access points

Hi I work for a small plant nursery that is split into two parts by a street. The main side of the nursery has the majority of the green houses. There is a main switch in the office and from there we ...
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5answers
2k views

Cascading Switches. Will it affect performance?

I am really new to large scale networking and all I know is the basics. I will be doing a network for a huge workspace consisting of multiple offices. There will be a total of 308 Clients, with at ...
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1answer
30 views

Privileged Identity Management for switch users' account

Is it possible to create an account in the switch for managing switch users' accounts such like changing password but may not allow to change specific administrator user. Can it be set on lower ...
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1answer
29 views

How to Reset AlliedTelesis GS950 Websmart hardware

The switch described above had a management IP address configured. Unfortunately, the IP address of the switch was lost and the management cannot be accessed anymore. Is there a hardware reset on this ...
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2answers
68 views

Is it possible to limit a IP's traffic in gateway Juniper switch?

In my gateway Juniper Switch: ... irb { unit 0 { family inet; } unit 2 { family inet { address 10.10.10.254/24; } } unit 9 { family ...
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1answer
31 views

ARP behaviors between hosts connected via switches

In a scenario like the following, where different hosts are connected via switches only, I'm not sure how the ARP packets will look like when A wants to send an IP packet to B. I assumed all the ...
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2answers
86 views

How can a IP under a VLAN communicate other VLAN's IP?

I have a network topology as below: I want to use the Server0 to manage(communicate) to 10.10.10.1-3. you know the 10.10.10.1-3 are vlan100's SVI. there have vlan 100 and vlan 501. IP programme: ...
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17 views

Find all switch between firewall and PC [duplicate]

I would like to know how I can determine on which switch a workstation is connected. For example, I have a 4 switch but I don't know on which switch my computer is connected. How do I get this ...
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47 views

Why write a static route, it can communicative to each other in my scene?

I have a network topology like below: In Switch0, Switch1 and Switch2, I added the a SVI. However, it is not possible to reach from one SVI the other ones. Now, if I write the following static route ...
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1answer
71 views

Cisco nexus vpc spanning-tree port type trunk question

I have very strange scenario here which you can see in diagram. SW1/2 is Cisco nexus 3064PQ switch configured in vPC and those switch connected to SW3/4 ( HP 6120XG ) switches on HP c7000 blade ...
2
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1answer
35 views

Question about Ubiquiti Edgemax switch syntax and VLANs

I've been beating myself over the head with a keyboard trying to figure this out. I'm used to switchport syntax on Adtran and Cisco switches, but I've got this situation with a Ubiquiti EdgeSwitch 48 ...
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0answers
25 views

Why Korenix Switches hang up SSH so often? [closed]

Does anybody know, why Korenix Switches hang up SSH so often? And then, you have to restart the switch each time, that happen. On HP Switch there is no problem with that SSH. If anyone has any ...
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1answer
38 views

1 switch handling several servers or several switches handling a server each?

Which of those two approaches are better for a more stable network? I was thinking 1 switch handling several servers so that other switches are able to handle other devices such as a desktop PC or ...
3
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1answer
25 views

SG3xx Password Reset/Recovery

Trying to reset a password for a number of switches I have. Didn't save the text file I had jotted it down in....of course. Connected via serial, but cannot seem to locate any concise info on ...
4
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1answer
74 views

Same Vlan Name / ID on different switches network subnet same or different?

I have several switches (some on same floor and another on other floors) all connected to core layer 3 switches through trunk links. One of the vlan id / name is repeated along the switches. May I ...
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2answers
67 views

is it ideal for a network that abandon the use of L2 switch?

I'm thinking about minimizing network hardware while optimizing network topology for company. If a company has unlimited(or very high) budget to build an ideal network for internal use(traditional ...
2
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1answer
60 views

Cisco nexus 9396PX TX output discard on 40G interface without link congestion

We have cisco nexus 9396PX with N9K-M12PQ module (12x40G Interface), We have 8x10G L3 LACP bonded connectivity with our ISP and so far so good no issue at all. but recently we migrated that LACP LAg ...
6
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1answer
1k views

Cisco 3750X Power Cable

I received a Cisco 3750X the other day. I went to go plug it in for testing and found that the standard three prong female power connector is no longer compatible with the power supply. Cisco has ...
2
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1answer
82 views

Do unmanaged switches honour QoS priorities set by managed switches?

Details about the devices We have a 24 port NETGEAR managed POE switch that has QoS capabilities. We also have the following unmanaged switches, 24 port Cisco POE, 48 port Cisco, 48 port NETGEAR, ...
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2answers
49 views

What's the `line protocol` and `Link`?

When I show a switch interface information, there are line protocol and Link: Switch-A(config-if)# show interface gigabitethernet 0/3 Gi0/3 up, line protocol is up (connected) Bridge Port Type: ...