Questions tagged [switching]

For questions related to traffic switching and troubleshooting the traffic switching process.

Filter by
Sorted by
Tagged with
1
vote
1answer
3k views

How does PPPOE bridging work?

How does the authentication take place in a pppoe bridge setup assuming I have a bridge modem and a router that is capable of maintaining a bridge connection both connected to an un-managed switch? ...
3
votes
2answers
3k views

Layer 3 Switching in Packet Tracer not working

I am studying for ICND1 through CBTNuggets, I recently watched videos on how to interact between different vlans using separate interfaces, sub-interfaces and Layer 3 Switching. The first two worked ...
5
votes
5answers
4k views

“simple” question about VLAN switching

Well, some days ago I had a interview for a IT networking job. One of the questions was about switching, and says the following: We have a computer A connected to a switch configured in VLAN2, and ...
3
votes
2answers
8k views

HP 5500 'display current-configuration' without 'super' permissions

I need to get configuration file from my hp 5500 switches. When I connect to it with ssh I need to enter a login and password and then super command to execute display current-configuration. I need to ...
4
votes
1answer
22k views

What are FPC and Linecards?

I am new to networking terms like this. Can somebody explain the difference between Linecards and FPCs? Are they the same or different? I have been hearing these in multiple contexts and sometimes ...
1
vote
1answer
361 views

SSH configuration is not found in Running-config in packet tracer

I opened up Packet tracer and configured SSH on a switch (2960) and logged to that switch from a PC. SSH was working. But when I see the running config, no ssh or crypto key configurations could be ...
6
votes
1answer
1k views

Successful Auto/Auto PAgP Port Channel?

Cisco documentation states the following on forming channels: SW1 SW2 ---------------------------------------- On On = Yes Auto/Desirable Desirable ...
7
votes
2answers
12k views

What do input discards on switch ports indicate and how can one track down their cause?

The conditions under which a switch will discard outbound packets on particular ports are fairly well established in many basic training materials, including those for CCNA. However, input discards ...
5
votes
1answer
865 views

What happens when you stop receiving BPDUs with no L1 loss?

We have a redundant path for some of our communications through a.) a Metro-E provider and b.) two routers forming an L2TPV3 tunnel. We have Cisco 2960 switches at both ends running RSTP to prevent ...
4
votes
1answer
2k views

Unmanaged Switches Effect on RSTP Ring?

What will happen if, SW1, SW2, SW3 are managed RSTP ring switches. And I add unmanaged SW4 and SW5 the ring (both SW4 and SW5 are connected together) like this: This project is currently at early ...
2
votes
3answers
537 views

vlan creation with just vlan name

I created a vlan in Juniper qfx3600 switch by specifying just VLAN name. When I tried to commit the configuration I got an error saying "need L2domain configured". I asked with my collegue, he said ...
3
votes
1answer
1k views

Connecting multiple switches without losing performance

At work, we have a network with about 20 computers on it. We're about to add another 20, so we need to invest in a second switch. We have a file server on the network, and generally this is the only ...
3
votes
1answer
1k views

All switching on cisco 3750 done by cpu

A little confused.. When trouble shooting excessive output drops on a 3750 i noticed that al switching is done by cpu instead of "route cache". This 3750 has no ip routing enabled and no ip cef (ip ...
13
votes
4answers
17k views

MTU and Fragmentation

Consider the following: NAS with 10G interface connected to 10G interface on switch. Client computers connected to switch via gigabit Ethernet. Will there be any gain in performance if MTU size is ...
6
votes
4answers
9k views

Switch Lookup Table

I was just reading a book called HeadFirst Networking and I'm a bit confused about something. I am attaching an image from the book. The page says that the direction of the frames as maintained in the ...
8
votes
3answers
807 views

Placement of firewall for VPN RA and L2L tunnels

For Remote Access (RA) and LAN-to-LAN (L2L) VPN, I currently operate a pair of Cisco VPN 3005 Concentrators tied to Internet edge routers on the outside and the inside tied to an internal pair of PIX ...
9
votes
1answer
2k views

Problems Connecting Catalyst 2960G to Netgear Prosafe Via Fibre

I've got a catalyst 2960G, connected to a Netgear Prosafe GS718T switch (cheap manageable switch). Idea is I have a couple of users that need access to a test environment - hence the cheap switch. It'...
7
votes
4answers
38k views

What OSI layer do Access Points operate on?

I am studying for CCNA. In my book I read that wireless access points belong to OSI layer 2. I did some research and I found that is correct. This raised lots of questions in my head so I hope I don't ...
5
votes
1answer
1k views

Is it possible for a private VLAN to have two simultaneous SVI mappings?

In our environment, we run our computers inline with Cisco IP phones to our switch. The problem is that our phones are on a separate VLAN from our normal access traffic. I would like to know if it is ...
12
votes
2answers
82k views

Port mirroring on an HP Switch (HP 2915-8G)

for sniffing purposes I need to mirror traffic on an HP 2915. How would I go about doing so?
8
votes
4answers
8k views

How do I set up a VLAN between an ESXi VM and Physical Hardware? [closed]

First of all, I am a total noob. The extent of my VLAN experience is setting up a guest network on a wireless router. I have recently gotten a request to set up a public network requiring filtering ...
6
votes
2answers
1k views

802.3x ethernet flow-control on user ports?

What is the best practice for putting 802.3x flowcontrol on a userport and does this inhibit performance if the application/system isn't designed for it? Eg) interface gig0/1 flowcontrol receive [...

1
5 6 7 8
9