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Questions tagged [switchport]

For questions about switchports on network devices. For instance, you want to configure a trunk on a router interface or you are wondering how you setup an interface on a switch for a server.

3
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2answers
25 views

HP switch “No untagged port”

A network engineer showed me the show vlan output of an HP switch. I know tagged ports are trunk and untagged ports are access in Cisco terms. But can anyone explain the "no untagged port"? How is ...
0
votes
3answers
67 views

Switch syntax, vlanXX and vlan [space] XX

How does a switch OS know that this is the same syntax? There are certain commands where you might reference the vlan like so "switchport access vlan 35", (a space between vlan and the number) and ...
4
votes
1answer
594 views

MAC Address learning process

Does a switch learns hosts mac address in these following scenarios: Switch port configured as access and frames received tagged on different VLAN Switch port configured as trunk and frames received ...
0
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0answers
52 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 ...
0
votes
1answer
26 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?
1
vote
1answer
287 views

When are Native VLANs used? Are there times when a Native VLAN will never be used?

This is probably a simple one, but I am very new to VLANs. I'd like to avoid using VLAN 1 as well as gain a better understanding of when native VLANs come into play when setting up a switch. On ...
2
votes
1answer
26 views

When the data pass the Switch in port can represent cost value?

The snapshot is a tutorial of Switch. You see the bellow snapshot, from the ROOT SW1 node to SW3, there are two path: the author says the the path1(left side path) cost is 0 + SW3-in-port. the path2(...
1
vote
1answer
48 views

How can I config multi switch port efficiently?

I have a Cisco 2960-24TT Switch, no I want to shutdown all the switch port, I have to enter the interface then execute no shutdown and exit it then re-do this steps. how can I config multi switch port ...
2
votes
2answers
77 views

How does a Layer 2 Switch know which port is a neighboring switch port and which port is connected to a host?

I want to know what is the mechanism behind a switch, so that it understands which of its ports are connected to a host (end device), and which of them are connected to another switch? Imagine trunk ...
0
votes
1answer
369 views

Can all ports on nowadays switches act as uplink ports? [closed]

I basically know nothing about networks (I just learned what switch meant yesterday), and English is not my first language but I hope I can make my question clear. So I just moved into a new house, ...
2
votes
2answers
356 views

HP ProCurve 2524 - CLI Command to find Fiber Transceiver's Serial Number

Is there any cli command allowing to check the serial numbers of the inserted mini-GBIC modules on a HP J4813A ProCurve Switch 2524? The show interfaces transceiver [PORT-NUMBER] command which works ...
1
vote
1answer
257 views

Cannot ping or SSH into new Catalyst 2960-CX switch from the server VLAN (1)

I recently setup a Cisco Catalyst 2960-CX switch at work (I'm a SysAdmin at a SMB). Our workstations use VLAN 3, but our servers use VLAN 1. The management IP of the new switch (in VLAN 3) is 192.168....
5
votes
2answers
203 views

What is the springing mechanism for on the top of this transceiver module?

Some Ethernet SFP modules have them, some do not. What is the yellow springing mechanism and the attached metal wire meant for?
3
votes
0answers
136 views

HP 5500 JD374A Port naming convention

Hi to all :) To most of you it'll prolly sound like a very silly question to ask, however to me as a fresh network trainee the answer is unfortunately not so obvious. So, the question is whether the ...
1
vote
1answer
77 views

What requirements must general firewall/routing software meet, to make OSI 2 port mirroring work correctly?

The basics are obvious, but there are technical points of networking implication which I don't understand. Some of these are general to networking, others general to all routing/firewall softwares ...
2
votes
2answers
877 views

Can VLANs with same no but on different switches communicate with each other?

If i have a VLAN (say VLAN 10) on switch 1 and again a VLAN 10 on switch 2. Can the hosts on these VLANS communicate with each other?
3
votes
1answer
144 views

Save switch config in USB

I want to save the configuration of an Avaya 4850GTS-PWR+ switch in a usb stick So I plug the usb in the switch Connect to the switch via putty using the Serial port in my laptop to the RJ45 Console ...
0
votes
1answer
335 views

L2 transparent firewall between router and switch running 802.1Q trunk mode [closed]

Router port facing to Core switch is running trunk mode allowed vlan 200 & 300. I am placing a firewall between the trunk connection. Can I set the firewall as L2 transparent mode or I need to ...
1
vote
1answer
72 views

L3 routing between switches with some VLAN's trunked

During a migration various L2 equipment will be replaced with all Cisco L3 switches and over time traffic migrated to routed subnets instead of trunked. There are two straightforward approaches that ...
2
votes
1answer
170 views

Broadcasting in L2 Switch

Hey guys, This is a Noob question. When a broadcast frame is received on a switch from a specific port, will it be automatically destined to all the ports in a switch ? ---------- (or) ---------- ...
2
votes
1answer
53 views

Auto smart ports macros triggers

My question is simple: I have a Catalyst 3560-X series switch and the below macro applied when i connect my laptop to the switch and it's working fine . function My_laptop_func() { if [[ $LINKUP == ...
1
vote
3answers
2k views

Connecting two switches with an access mode port

I manage a switch, and I saw that on one interface there were 19 different MAC addresses, all of them on the same VLAN, so I guessed that there was a switch connected to that interface. Since all MAC ...
2
votes
1answer
261 views

Switchport negotiation between trunk and dynamic desirable

If two switches are connected, one with switchport mode trunk and the other with switchport mode dynamic desirable, will both switches form an operational trunk?
-1
votes
1answer
58 views

Help in Identifying the components in the below picture?

One of my friends send me this picture asking me whether I have any idea what the device on left of modem box, which is connected to two COM ports. He thinks I am smart. I will break to him I am not, ...
1
vote
1answer
597 views

Configure VLAN on Cisco SG-200 switch connected to a Meraki switch/network

I have a Cisco SG-200-26 switch connected to a port on a Meraki switch. The Meraki switch shows a list of all devices detected on that switch port (the Cisco switch and all of the devices connected ...
0
votes
1answer
131 views

Newb question, about LLDP for inventory

New (to enterprise networking) guy-- My org is facing room re-numbering of a 5 building, multi floor campus, wherein all nodes (PCs, printers, A/V) will need to be renamed. Wondering if, after the ...
2
votes
3answers
94 views

can i check the ip of the machine attached with the network switch port from the switch console

can i check the ip of the machine attached with the network switch port from the switch console? I just wanted to get the IP address of all the attached devices by running a simple command in switch ...
1
vote
1answer
861 views

Why HP comware shows “ARP limit exceded”?

%Apr 30 11:32:06:216 2000 ICT ARP/4/RATELIMIT: The ARP packet rate(178pps) exceeded the rate limit(50pps) on interface GigabitEthernet1/0/24 in the last 60 seconds. %Apr 30 11:33:06:824 2000 ICT ARP/4/...
2
votes
3answers
1k views

Forwarding to multiple output ports using SDN

Using switches that support OpenFlow, is it possible to forward packets for specific flows to multiple outgoing ports, so that each port receives a copy of the packet (similar to multicasting scenario,...
1
vote
1answer
593 views

Cisco, No dot1q tunnel mode on switchport

The problem is: I can not find a QinQ(a.k.a. double vlan tagging or dot1q tunnel) feature in the following cisco switch: WS-C4510R+E, SUP8-E with WS-X4748-UPOE+E line card installed. The Cisco ...
1
vote
2answers
77 views

Utilization of ports on switch

I have two WS-C3560E-48PD switches in the same organisation. How can I know which ports are utilized on the switches, and PC, phones, and printers? Is there are some command used to know above issue?
1
vote
1answer
658 views

How do I enable port security on Cisco switch?

I have a Cisco switch model 3500 series 48 port. I need to enable port security on this switch. Could you tell me the configuration commands to apply this policy?
1
vote
2answers
704 views

Single out switchports with multiple MAC addreses

Finding out how many devices are connected to a single switchport is easy on a non-stacked Cisco network switch with a sh mac add ta or sh mac add int fa/gi/eth. In our enterprise we have many large ...
3
votes
1answer
464 views

Isolating ports on a Cisco Catalyst 2960-X Switch

I'm a bit of a newbie when it comes to networking, so excuse my ignorance for asking this. I did try to post this on the Cisco support forums, but kept getting told it was spam haha, so I hope this is ...
1
vote
2answers
214 views

How does a switchport learn a MAC address

I have a very basic question. How does a switch port learn a MAC address? In this scenario say a host is not trying to communicate with any one. It is just plugged in the switch port. Does the host ...
1
vote
2answers
98 views

Locating device with IP address

I have a list of old IP addresses of devices, they need to be switched to a new IP scheme. At each switch in the company there patch panels that patch to the switch. The patch panel is labeled with ...