All Questions
12
questions
1
vote
4
answers
648
views
setting up a VLAN and joining 2 buildings through underground cabling
I am pretty much a newbie when it comes to networks so forgive me in advance if this question seems odd.
So here's a situation I am trying to figure out. There's a company who operates in 2 adjacent ...
- 11
7
votes
3
answers
10k
views
Posible to connect VLAN switch through dumb switch?
Is it possible to connect a VLAN switch into a dumb switch ?
The router will know how to reach network connected by a VLAN through the dumb switch please ?
No edge effect ?
By example, a schema of ...
- 71
0
votes
2
answers
359
views
Can a switch segregate traffic that is before the switch from after the switch?
Per the question, Lets try to clarify a bit. Can a switch that has a router connected to it, segregate traffic (using a VLAN) from traffic that is part of the modem/router the switch is connected to?
...
- 11
2
votes
2
answers
960
views
When should the portfast command be used on Cisco switches
Cisco literature states that the portfast command should only be used when connecting a single end station to an access or trunk port.
Can some clarify what is an end station in this context?
Using ...
- 499
10
votes
2
answers
2k
views
Can a switch that does not support VLAN process traffic from a Trunk that is not the native VLAN
Recently encountered a setup where the engineer had a Multilayer Cisco switch with a trunk carrying VLAN 41 to an HP switch that did not support VLANs.
What should the HP switch do with the 802.1q ...
- 499
2
votes
2
answers
496
views
Understanding VLAN tagging
Let's say we have 4 machines connected to a layer 2, managed switch which is connected to a layer 3 switch. Say that 1.2.3.0/24 is routed to the layer 3 switch. Our goal is to have 1.2.3.0-63 usable ...
- 123
2
votes
2
answers
2k
views
Is a VLAN relevant for multicast frames?
In a switched Ethernet network is there a use-case for having VLAN tags for frames that have a multicast MAC as destination address?
I cannot find a use-case because:
VLANs are generally used for ...
- 153
2
votes
2
answers
3k
views
Splitting a switch with VLANS. Is it secure?
I'm trying to get my head around VLAN terms tagged, untagged, and PVID.
From my understanding so far:
every port on a switch can be mapped to a particular VLAN.
when a packet (assigned to a VLAN) ...
- 123
4
votes
2
answers
415
views
VLANs isolating networks (VoIP/Wi-Fi)
I have to set up our network in our new office. I'm no networking expert (developer), but I need some input and advice here for some things I wonder about.
I have purchased the following:
2 x Cisco ...
- 83
4
votes
1
answer
939
views
Creating multiple trunk ports on a Cisco ME3400
I have a cisco ME 3400 switch . And I have configured fa0/23 as trunk port and connected this to a router for carrying multiple vlan traffic. And i have created some vlans eg: 1500, 1501 etc and added ...
- 41
34
votes
1
answer
91k
views
Using SNMP to retrieve the ARP and mac-address tables from a switch
I would like to get ARP tables from a switch to a syslog-ng server that has been set up on Ubuntu Server 12.04 LTS. I have read about SNMP and I know the server will act as a manager and the switch as ...
- 695
7
votes
4
answers
6k
views
Are multiple links with different VLANs between two switches possible?
I'm not considering Etherchannel or LACP.
Given 2 Ethernet switches A and B, where both switches have port 0 configured as a tagged trunk for VLAN 100 and 101 and port 1 configured as a tagged trunk ...
- 783