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.

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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 ...
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1answer
394 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?
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1answer
60 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, ...
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1answer
833 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 ...
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1answer
161 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 ...
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3answers
105 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 ...
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1answer
2k 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/...
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3answers
2k 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,...
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1answer
893 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 ...
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2answers
79 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?
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2answers
1k 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?
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2answers
1k 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 ...
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1answer
623 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 ...
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2answers
411 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 ...
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1answer
1k views

Cisco switch not showing MAC flapping messages

I have two Cisco switches in the same VLAN, physically connected to each other. One of the switches is a 3650, and the other is a 4948. On the 3650, I can see MAC flapping messages between 2 ports, ...
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2answers
146 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 ...
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1answer
912 views

Switch Port Configuration

I need to simply configure switch ports which are similar: switchport mode access switchport access vlan XX switchport voice vlan YY spanning-tree mode portfast I'm asking about using Smartports ...

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