Newest Questions
16,963 questions
1
vote
2
answers
256
views
Dell N-Series STP root problem
I don't understand what is going on with a switch I just purchased. Sorry I only have a rudimentary knowledge.
I currently I have two switches N3048 core switch which is acting as the root (spanning-...
- 11
1
vote
1
answer
67
views
2 Firepower 1120 Firewalls connected to a layer-2 switch
I am working 2 cisco firepower 1120 firewalls, which are connected to a 5-port layer-2 switch through their "outside"(Ethernet1/1) interfaces, each with an IP address of the form 192.168.1.x ...
0
votes
1
answer
59
views
FHRP Cisco Reading
I'm currently going over reading material for First Hop Redundancy Protocols
Hot Standby
Virtual Router Redundancy
I don't recall any of this being in CCNA, did I miss this or is it newly covered in ...
- 115
0
votes
1
answer
55
views
Determine what is an uplink on Juniper switch
Given, decent size network, switches are mostly Juniper 10Gbps. The goal is to identify uplink interface with some reliability. SSH and SNMP access, as well as Solar Winds statistics are available. ...
- 1
1
vote
1
answer
73
views
Network Cable Tone testing frequencies and practical applications
Using the Klein Scout Jr. 2 cable tester, the Tone Testing feature sends Low and High frequencies "tones" through the wires to identify wiring issues.
I couldn't find what are the actual Low ...
- 177
0
votes
0
answers
57
views
How to add a static IP address in my SOPHOS XGS Firewall?
I am new to networking, and I want to create a static IP address for my Sophos Connect VPN. So, previously, it was done by the vendor, not the static IP address setting, but they gave us three ISP's ...
0
votes
0
answers
26
views
Dedicated EC-GSM-IoT GSM frequency bands?
As far as I know EC-GSM-IoT is deployed in band with the regular GSM frequencies, but so far I couldn't answer the following questions:
Do providers set aside dedicated frequencies in their GSM range ...
- 101
0
votes
2
answers
67
views
Propagation of multicast frames used for networking protocols (e.g., stp, lldp)
I'm looking for proper resources on how frames with multicast destination mac addresses, specifically those used for networking protocols such as STP, are propagated within a layer 2 domain.
For ...
1
vote
3
answers
728
views
Why doesn't server response reach client in different subnet despite overlapping IP ranges?
I have the following network setup:
Client: 192.168.0.10/24
Server: 192.168.1.10/16
Router:
Interface 1: 192.168.0.254/24
Interface 2: 192.168.1.254/24
The router knows about subnets 192....
- 121
2
votes
1
answer
61
views
Recommendations about the volume of IPsec traffic before exchanging a new key
Im working on deploying a reasonable IPsec lifetime policy on our FlexVPN configuration we have. The defaults from Cisco are as follows:
router#show crypto ipsec security-association lifetime
Security ...
- 1,751
4
votes
2
answers
235
views
MTU size on physical and logical port in OSPF
A single physical interface has multiple sub-interfaces (VLAN interfaces). These sub-interfaces are configured with IP addresses and OSPF. The MTU of the physical interface has been increased, but the ...
- 601
0
votes
0
answers
23
views
How to identify if there are two devices with same IP adress on a network? [duplicate]
Does somebody know a way how to detect if there are two different devices with same IP-adress on network?
Let us say we have a large network, but there are by mistake two devices with same IP-adress:
...
- 1
0
votes
0
answers
36
views
Cisco Router Not Connecting to Wireless Router for Internet Access
I'm having trouble getting my Cisco router to communicate with a wireless router that connects to the internet. My goal is for end devices to access both an internal server and the internet. However, ...
- 13
6
votes
2
answers
697
views
Why do enterprise grade switches have dedicated grounding screws/lugs but home grade switches don't?
I've noticed that enterprise grade switches usually have dedicated grounding screws or lugs, but home grade switches don't.
Is it just because of that fact that they will be used in different ...
- 63
3
votes
1
answer
273
views
Auto-MDIX on Gigabit Ethernet
We all probably know what Auto-MDIX is and what problem it addresses for 10/100 Mbps Ethernet.
My general question is: What Auto-MDIX does for Gigabit (and faster) Ethernet and is it really needed?
...
- 355