All Questions
Tagged with switchport cisco
22 questions
0
votes
1
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738
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Best Practices for Configuring Port Security on a Layer 2 Switch
How to configure port security on trunk and interfaces
I'm learning about port security and have a few questions. I have a layer 2 switch with interfaces f0/1-22 in access mode to access VLANs, ...
- 27
1
vote
1
answer
501
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Deleting description on Cisco 9300 switch
I have a port that has a description that is not needed. How do I go about just deleting that line. Sorry for the simple questions, I am very new to the networking world.
interface GigabitEthernet3/0/...
- 41
1
vote
2
answers
243
views
Difficulties retrieving attached device MAC addresses from switches/switchports
We have hundreds of mostly Cisco switches and I'm trying to track down all the MAC addresses (latest would be good enough) seen by all the switchports. Following the suggestion given here, I've been ...
- 111
0
votes
1
answer
22
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DOT1X: A practical case for ForceUnauthorized state
I have been working as a Network Engineer for almost 5 years now. I have never encountered a scenario where I would need to configure a Cisco switch port as ForceUnauthorized (DOT1X).
According to the ...
- 273
1
vote
4
answers
965
views
Cisco Core Switches - Identifying unused ports
I've started at a new site, and the server room is an absolute state - I want to get in and start removing unused patch leads, so that I can start to see what is available & to tidy up.
There is ...
- 13
4
votes
1
answer
201
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How Can a VPC ping the Router through an Etherswitch that behaves in one port as router and in the other as switch
In the following topology my main purpose is to:
1)PC11 ping Router(R)
2)PC11 ping PC13
ESW10:
In gig0/3 has the no switchport command and a given IP address.
In gig0/2 it has the switchport access ...
- 89
0
votes
1
answer
441
views
Switch Port channel down but firewall did not log the port down event
Can some one help me here if I am missing anything to check.
Issue:
Our Palo Firewall got a vwire configured with interfaces eth1/5 & eth1/6.
eth1/5 is directly connected to eth1/2 of cisco switch ...
0
votes
3
answers
107
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Show ports in use on Catalyst 3570
I picked up a used C3570 and am new to IOS. I am trying to ask the switch to show which ports are in use. My searches lead to the command "show modules" but that's refused by the switch (...
- 125
0
votes
2
answers
2k
views
Sending tagged traffic to untagged port?
What happens when an untagged port receives tagged frames, whether they are dropped or not !?.
Say, A computer is connected to a switch on untagged port (as most would recommend). On it I have used ...
- 3
1
vote
2
answers
1k
views
ping in the same VLAN with multiple switches in between
Refreshing VLAN knowledge with PT7.3, I came across some unexpected behavior.
Why does a chain of switches having proper trunk configuration between them DROP packets? Trying to ping hosts from the ...
- 113
4
votes
1
answer
848
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 ...
- 1,085
1
vote
0
answers
282
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 ...
- 11
1
vote
1
answer
73
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 ...
- 155
5
votes
2
answers
787
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?
- 153
2
votes
3
answers
5k
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?
0
votes
1
answer
625
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
1
answer
208
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 ...
- 227
1
vote
1
answer
1k
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 ...
- 111
1
vote
2
answers
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?
3
votes
1
answer
905
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 ...
- 31
1
vote
1
answer
2k
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, ...
- 149
2
votes
1
answer
998
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 ...
- 3,454