All Questions
155
questions
2
votes
2
answers
663
views
Connecting two HP 2910al Switches using SFP to get 2Gb/s speed
I would like to Connect my two HP 2910al switches using SFPs to get a maximum of 2G links.
is this possible, and how?
I want to make both of them to use the IP address (ex 192.168.2.xxx).
I have the ...
- 27
0
votes
0
answers
402
views
Using GNS3 to Sniffing Packets on Siemens RuggedCom RS900
I am using GNS3 to simulate an environment. I have 4 docker containers which all host Python programs. Three of the devices communicate with each other via the programs (Program 1, Program 2, Program ...
0
votes
1
answer
65
views
Understanding L2 Switch (Network Noob)
I currently have the setup on the left and it works just fine...
I use it to transfer data between laptop and embedded systems hardware device. (Data...Not internet)
Question:
What would the set up on ...
- 3
1
vote
2
answers
570
views
How do routers. switches, bridges and hubs deal with corrupted data?
By data corruption I mean frame/packet corruption, we can stick to the corruption due to a collision for simplicity.
I know that switches can detect frame corruption if they are not set to cut-...
- 155
2
votes
3
answers
2k
views
If no CSMA/CD on switches what are they using
As far as I understand, CSMA/CD is an access method to place Ethernet frames on the wires in computer networks.
I read everywhere that switches are not using this access method because they are full-...
- 21
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
3
votes
2
answers
932
views
Why the network switch drop the frame acording to ethertype/length?
I have a network switch IC , and I am using to the send BPDU packet. I can send packet with 2 byte ethertype/length field like this : 81 00, 80 00, 91 00 and some special hex number. But if I try to ...
- 133
0
votes
1
answer
425
views
Do Cisco SG300 switches perform CRC error correction?
Cisco SG300 series switches are capable of detecting CRC errors as can be seen in the interface counters.
But can they correct CRC errors and pass the frame along to the destination or the only way ...
- 113
1
vote
1
answer
212
views
Why is XGMII little endian while the network is in big endian?
Why is XGMII little endian while the network byte order is big endian (RFC1700)?
- 396
3
votes
2
answers
162
views
Industrial Ethernet network design
looking for some advice on network architecture for an industrial switchroom with several constraints.
Modbus TCP devices are located in motor control centre cells, these need to connect to the ...
- 31
0
votes
2
answers
1k
views
How is Ethernet a packet-switched network?
Let's say for example there is an Ethernet switch, and there are four PCs connected to this switch. PC1 and PC2 are communicating with each other, and at the same time PC3 and PC4 are also ...
- 491
1
vote
2
answers
474
views
Can you stack Cisco 350 28P PoE switches with CAT5E or CAT6 ethernet cables?
I have four new Cisco SG 350 28P PoE switches, but no stacking cables. Can I use CAT5E or CAT6 ethernet cables to accomplish stacking them?
- 11
0
votes
2
answers
372
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
2
votes
1
answer
1k
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 ...
- 4,379
1
vote
1
answer
2k
views
How does Kismet find WIRED devices when scanning Wi-Fi? [closed]
In an effort to better secure my Wi-Fi network by finding its weaknesses and mitigating them, I have employed the use of Kismet, a well known Wi-Fi security scanning tool. When I use Kismet to scan ...
