Questions tagged [switching]
For questions related to traffic switching and troubleshooting the traffic switching process.
335
questions
0
votes
2answers
61 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
1answer
40 views
What's the LAG interface period be if the two switches have different periods set
Considering a LAG interface between two devices A and B, A is configured to have LACP fast transmission and B to be LACP slow what would be the resulting aggregate interface's period be?
0
votes
2answers
39 views
Switch Ethernet Port Groups
I am setting up a motion capture system (vicon vantage), and the cameras are PoE, and all plug into a switch (DGS‑1026MP, 26 Port Gigabit Max PoE Switch) to feed a PC.
The instructions say to not ...
0
votes
1answer
44 views
What exactly is fragment free switching?
Most commonly refered to as a compromise between store-and-forward and cut-through switching, this method involves storing the first 64 bytes of the ethernet frame in a buffer and then forwarding it. ...
3
votes
3answers
125 views
How to add multiple ip address in destination ip in acl rule
Iam trying to block a certain host from sending any message to any host in the network
is there is a way to do that or i have to deny host by host ?
0
votes
1answer
22 views
Which path will frames prefer in this setup? [closed]
So I recently installed a long rj45 cable to replace the powerline adapter I was using. I'm keeping the PLA in place as a failover but wanted to know if I will need to swap the connection by hand to ...
1
vote
1answer
43 views
How to do port mirroring in Juniper EX2200 switch
I am using Juniper EX2200 switch, one of the connected System generating lot of unwanted traffic ( varying from 10 Mb to 25 Mb upload traffic). I wanted to analyse those traffic using port mirroring ...
0
votes
0answers
20 views
Loop-prevention measures on BGP-signalled VPLS
I have a project to configure a BGP-signalled VPLS overlay for an MPLS network. I will multihome the VPLS to a switching fabric via 2 PEs for redundancy.
I understand that VPLS split-horizon behavior ...
1
vote
2answers
66 views
Cisco 3750X Switch stack best practices
I have a stack of 5 Cisco 3750Xs. I am debating between taking all my servers and putting them on one of the 5 switches, or distributing them over the first few ports of all 5 switches? All of the ...
4
votes
1answer
74 views
Same Vlan Name / ID on different switches network subnet same or different?
I have several switches (some on same floor and another on other floors) all connected to core layer 3 switches through trunk links.
One of the vlan id / name is repeated along the switches. May I ...
0
votes
1answer
32 views
Netgear M4300: Is it possible to enable multiple destination ports for mirroring?
I have a Netgear m4300 12x12f. Using the web Console I'm able to use one global port for mirroring traffic from other ports. Is there a way to have different ports mirroring different traffic? I'm ...
1
vote
1answer
23 views
Sending Broadcasting Frames after sending Unicast Frames
Absolute newbie here guys,
I was reading the compTIA Network+ guide by Mike Meyers, and a section reads: "The frame propagates down the wire into the central box. The switch sends
unicast frames to ...
4
votes
1answer
418 views
Why would a switch ever send an ARP request for a MAC address when it can just wait for the first packet to be received from a device?
I've been reading 'Windows Networking Fundamentals' and in that book it says that a switch can learn what MAC address is associated with a particular port when the connected device makes its first ...
1
vote
1answer
173 views
Flooding vs Unknown Unicast Flooding
Can someone clarify what is the difference between Flooding and Unknown Unicast Flooding?
Is it the same thing or it contains different meaning?
I'm aware that Flooding happens when a switch ...
3
votes
1answer
486 views
Difference between Giant Frame and Jumbo Frame
Can someone enlighten me the difference between Giant Frame and Jumbo Frame?
From what I hear, Giant frame is a frame with the size greater than 1518 Bytes excluding Preamble, Frame Delimiter and ...
0
votes
1answer
28 views
localhost vs local IP address: traffic flow [closed]
Let's say I have a server with IP address 192.168.0.1 that is running a network service (I don't think it is important what kind - let's say a webserver on port 80).
If I am on the server itself and ...
-1
votes
1answer
43 views
Mac Address Flapping and switches
Is mac address flapping the reason why switches don't exchange switching information just like routers exchange routing information?
4
votes
3answers
157 views
Inter-VLAN Routing Issue
As you can see in below diagram regarding the Inter-VLAN between Server (VLAN 107) with The site in (VLAN 104)actually, we can ping all the inter-VLAN on the site.
but we cannot browse some of them ...
0
votes
0answers
18 views
DTP On Trunk Ports [duplicate]
When Statically Configuring a Port As Access, DTP Will Be Automatically Disabled. So Why Is It When Statically Configuring a Port As Trunk, DTP Will Still Be Enabled?
0
votes
0answers
36 views
Is it possible to use FDM and TDM at the same time?
I'm learning about FDM and TDM. And I got the idea that we can use frequency division and time division at the same time, i.e. using TDM for each frequency band. Is it possible? It seems certainly ...
4
votes
1answer
620 views
MAC Address learning process
Does a switch learns hosts mac address in these following scenarios:
Switch port configured as access and frames received tagged on different VLAN
Switch port configured as trunk and frames received ...
0
votes
0answers
33 views
Spanning tree priority values on port-channel
Group Port-channel Protocol Ports
-------------------------------------------------------------------------
1 Po1(U) LACP Gi0/3(P),Gi0/9(P)
4 Po4(U) LACP ...
2
votes
2answers
296 views
Spanning tree Priority values
show spanning-tree interface gigabitethernet 0/2
Switch default
Instance Role State Cost Prio type
-------- ---- ----- ---- ---- ----
MST00 ...
0
votes
1answer
125 views
Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems?
Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems?
Please, refer to the attached drawing.
What are the equivalent Cisco Switches ...
1
vote
2answers
77 views
Confused between packet switching and circuit switching
I am a bit confused between packet switching and circuit switching usage in telephones. If there is a loss of packet in packet switching or the packets may arrive in different order why is it still ...
2
votes
1answer
90 views
Is FDM and TDM only used in circuit switched networks?
I get the idea that TDM and FDM can be used in circuit switched networks, but what about packet switch ones? Can FDM be used?
1
vote
1answer
38 views
Tracking the packet flow thru a LAN
We are using a private 10.0.0.0/8 network for the management and other local traffic (storage) in our LAN as shown in the symbolic layout here:
10.0.0.1 10.0.0.2
Gateway ...
4
votes
1answer
133 views
What are reasons to configure a Voice VLAN using the Auxillary VLAN feature instead of a Trunk + Native vLAN
Imagine this topology:
[PC] ------- [VOIP Phone] ------- [eth0/0 on a Switch]
And this configuration on the switch:
vlan 22
name DATA
vlan 33
name VOICE
There are two ways to have both the PC'...
4
votes
2answers
295 views
Network Redundancy with LACP Trunking
I would like to set up a redundant link between two switches. I have four ports available to accomplish this.
Scenario A: Switch 1 has ports 1+2 trunked together via LACP. They are plugged into ...
1
vote
1answer
66 views
Networking Questions (Routing and Switching)
I inherited a haphazard network that I'm in the process of cleaning up and modernizing.
Here is a synopsis of the current issue:
We have a MySQL DB hosted on a Windows 7 PC (solely used to host the ...
2
votes
1answer
57 views
Routing and Switching & network monitoring
hi i am facing problem in juniper switch Model: ex4200-48t ,Junos: 15.1R6.7 . i deploy network monitoring check-MK software. there is showing errors of juniper switch ports and also show in logs file ...
2
votes
1answer
41 views
Two channels between two switches
Is there a way to provide two physically diverse channels between two switches? I'm using two Cisco Catalysis 3560s, and I want to have two separate channels between them, with different access ...
3
votes
1answer
65 views
Cascading a switch interface to another switch
We have a service provider switch which has an interface that we use to connect to other users over.
We have been advised by the SP that we can use this interface how we wish (i.e. feed it into a ...
2
votes
1answer
237 views
Configuring multiple subnets with switch connected to single router interface
I have a design like this
But I'm receiving a lot of mismatch errors and it doesn't work at all. I tried to ping 10.0.0.1 to no avail.
I'm trying to configure the vlans on the switch 1 this way (...
6
votes
2answers
718 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 ...
4
votes
1answer
203 views
Cross datacenter IP failover/migration
I am trying to wrap my head around this (very) simple issue of IP failover from one physical location to another. I have a few Virtual machines running at Site A where I need to rebuild the NAS. In ...
8
votes
3answers
2k views
Is there a performance difference between a managed an unmanaged network switch?
Is there a tangible difference in speed/latency between a managed and unmanaged network switch?
2
votes
2answers
44 views
Can Multicasting be duplicated by broadcasting on a subnet?
Is there any functional difference between:
A) Broadcasting to a range of addresses
B) Putting the range of addresses into a subnet and broadcasting to that subnet
Would it matter if there was a ...
1
vote
1answer
62 views
from where/how is the figure of 50 m sec protection switching time calculated in case of ERP/ MPLS?
From where or how does the figure of 50 m sec protection switching calculated for MPLS/ ERPS?
2
votes
1answer
53 views
Network ( routing and switching) , security
In my company network i am installing new cisco2811 router but i have problem, my LAN network can not ping and access network. i get point to point internet from ISP.
PTP IP is 192.186.86.200/24 and ...
1
vote
1answer
173 views
Understanding IP multicast in linux [closed]
My ultimate goal is to setup IGMP snooping on a linux machine using netfilter hooks. This is for exploratory purposes to understand IGMP protocol.
The topology we are using is as follows:
| ...
2
votes
2answers
50 views
Cisco router with switch interfaces help
I was wondering if a connection comes in on a Cisco router interface. Can that connection be pointed towards a switch interface if said router has a switching module?
I haven't tried it, but I'm ...
0
votes
2answers
132 views
Layer 2 Routing between subnets and VLANS [closed]
I am studying for my Networking exam and from what I have pieced together from other posts on here is this. Please correct me if I'm wrong:
Layer 2 switches can only route packets between different ...
3
votes
1answer
750 views
Using IGMP but Multicast still Flooding
Im new here.
I want to ask about the multicast,
The first case is, I have switch HP 2530 24 port with 24 10/100 and 2 100/1000 NIC, And i have servers with bandwidth video multicast around 120-...
1
vote
1answer
213 views
Help this problem with Dhcp Server with two switches
I will try to explain my problem. I am trying that Switch 1 can give dhcp for pcs but i cannot, in Switch 0 I can give dhcp server in the pcs. sorry for my bad english
ROUTER
!
version 15.1
no ...
1
vote
2answers
51 views
Advice on potentially needed subnet expansions
I work for a non-profit with some slightly more antiquated hardware. We have 3 locations, about 700 devices across them. Right now our locations are set up as:
Location 1 (Main) - /23 with a DHCP ...
0
votes
1answer
344 views
Is forwarding rate important for selecting a collapse core switch in IP camera implementation?
I need to select a core switch that will connect my access switch to an IP surveillance's server. The point is that in my network I'll have 109 IP camera sending real time traffic to the server and I'...
5
votes
2answers
76 views
Network Ten LTE Hubs Into One Network
I'm working through a tricky situation getting a field office set up out in a very rural area. There are ten 12' x 60' trailers being set up (2-3 metres apart from one another), each with varying ...
3
votes
2answers
53 views
Cisco Router 1800 series doesn't route internet
Working on an issue with a 1800 series Cisco Router. Router get's Internet just fine, can ping Google, Microsoft, etc.. Router is connected to a switch, switch connects 2 workstations running Windows ...
2
votes
2answers
76 views
Cellular signal handoff
In a cellular network like T-Mobile, Sprint, etc. if one sector of a tri-sector tower is maxed out and can't accept new calls, will a new call request normally served in that sector be handed off to ...
