Network Engineering Stack Exchange
Network Engineering Stack Exchange

Most Popular

more tags
1500 questions
10
votes
1 answer

What is the use of the IPv6 scope ID?

In the structure struct sockaddr_in6, the field sin6_scope_id is declared. What is the use of this member? How can we know from the IPv6 address and the prefix length the scope that it should use?
Bionix1441
  • 329
  • 2
  • 4
  • 8
10
votes
2 answers

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 traffic when it is received? I understand that the…
dcrearer
  • 499
  • 2
  • 4
  • 16
10
votes
3 answers

Trying to get 10 gigabit connection over a switch with 100 megabit standard gateway

I have limited knowledge of this and I'm still learning, so I hope someone can give me advice on this. I have a 10GbE NAS, a 10GbE NIC in my PC and a switch with two 10GbE ports, which connect all together with fiber. Then there is also another…
aardbol
  • 259
  • 4
  • 13
10
votes
2 answers

Can a switch that does NOT support VLAN capability be considered a managed switch if it has other features?

So the question is in the title. If a switch does not support Virtual Local Area Network capabilities can it still be considered a managed switch? What other features should it have to be considered managed switch besides VLAN capabilities?
yoyo_fun
  • 1,531
  • 4
  • 19
  • 28
10
votes
2 answers

KEMP load balancers using UCARP (VRRP) - multicast MAC address not being picked up

Alright - been battling this for at least 20 hours consecutive.. Sorry if this seems like a long rant, or a blog post, but I'm getting to the point of exhaustion. So, here's the deal. We're using KEMP load balancers, who utilizes UCARP (a Linux…
pauska
  • 422
  • 6
  • 15
10
votes
3 answers

Do Bluetooth Devices have MAC address with the same specification as the MAC addresses of the Ethernet and Wi-Fi Network cards?

I recently found out that ZigBee devices have MAC addresses. ZigBee is more related to Bluetooth from what I know rather than Ethernet or Wi-Fi. Do Bluetooth devices such as phones, headphones, wireless speakers, televisions have MAC addresses also?…
yoyo_fun
  • 1,531
  • 4
  • 19
  • 28
10
votes
2 answers

What's the difference between RADIUS and 802.1X Port-Based Authentication?

As long as I know RADIUS is a type of authentication protocol, where for example if someone wants to use a switch, it first of all needs to enter his/her credentials, and properly authenticate himself/herself to the RADIUS server in order to gain…
user2066
10
votes
1 answer

What is "1 Erlang" for network data traffic?

I understand (or at least I believe I do) the concept of Erlang load unit when it is applied to voice communications. Voice communications occur in real-time and measured against real-time, so naturally we can just divide the total amount of voice…
AnT stands with Russia
  • 203
  • 2
  • 6
10
votes
3 answers

JunOS: Can I have a live console log?

On a Cisco IOS device the command logging buffered 51200 notifications logs most information to the routers memory (obviously you can change that to informational or debugging as required). When connected to the router via telnet or SSH I can…
Baldrick
  • 5,300
  • 7
  • 38
  • 79
10
votes
3 answers

Why is there no "round robin" option for lacp (at least on my switches)?

I am trying to increase bandwidth for particular hosts by using lacp on a Cisco Catalyst 4500 switch. However, it seems that I will always end up with the same flow (src/dst mac, ip, and port) being completely switched over one interface, no matter…
Hagen von Eitzen
  • 201
  • 2
  • 6
10
votes
1 answer

QoS between two VLANs with Cisco 881 Router (IOS)

I'm hoping to get some advice regarding the best practice to delegate a limited Internet connection between two VLANs. In my case, one VLAN is for an office network, and the other is for guests. What I'm hoping to do is allow a certain percentage of…
David Rediger
  • 257
  • 3
  • 9
10
votes
6 answers

Can a single optical fiber support full-duplex communication?

Can a single-mode single optical fiber support full-duplex communication, or does it have to be two fibers, one for each direction?
Rodrigo Stv
  • 223
  • 1
  • 2
  • 4
10
votes
2 answers

Does session in "http session" mean the same as in "session layer" in OSI model?

Does session in "http session" mean the same as in "session layer" in OSI model? Is a http session a session in the context of "session layer" in OSI model? Is a http session only a pair of request and response, or can it be a sequence of multiple…
Tim
  • 1,545
  • 15
  • 27
10
votes
1 answer

High-Density WiFi & 2.4GHz Co-channel Interference design

The issue: CCI (Co-channel Interference) on 2.4GHz. The Environment: 40 seats per classroom. Higher-ed, so extremely mixed client base. AP-on-a-stick set to 24Mb lowest Mandatory data rate & lowest Tx power setting (2 dBm) The Problem: Needing to…
Mike A
  • 176
  • 1
  • 8
10
votes
7 answers

How does the computer detect the router?

Is the router always broadcasting "I'm here" (say, every period of time) and the computer listens or the router listens and once the computer broadcasts "is there a router here?" It responds? It sounds like a silly question but I can't find an…
Zach P
  • 203
  • 2
  • 5
1 2 3
…
99 100