Questions tagged [switching]
For questions related to traffic switching and troubleshooting the traffic switching process.
359
questions
0
votes
1answer
27 views
IP Routing and Switching Interface Speeds
I have a question that relates to routing and switches. I am looking to set up a new Firewall that will handle the routing for the network and attached to the Firewall will be a switch. Here are the ...
0
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0answers
12 views
subnet masks with different networks with packet tracer [duplicate]
Iam beginner in dealing with routing and networks
i have designed a network using packet tracer
i have used the default 255.255.255.0
My question is
How i can design the subnet masks for every ...
5
votes
6answers
3k views
packet routing between subnets on same vlan
I am trying to understand how packets are routed within the same VLAN. I understand that typically there should be a 1:1 mapping between VLANs and Subnets. However if i deploy the following ...
0
votes
1answer
51 views
Why Do We Use STP (Spanning Tree Protocol) or RSTP (Rapid Spanning Tree Protocol) When Packets are Not Routed Optimally?
I am new to networking so this probably a naive question. I've been reading up on the spanning tree protocol and understand why it's necessary in a network (it prevents loops) and I understand that ...
0
votes
1answer
32 views
Unicast Adjacency Routes Nexus (AM) Cisco Nexus
I have an odd situation. There is static route on my Nexus 7700 that routes anything for specific subnet /24 to a F5 LTM Load Balancer, external VRRP interface 10.x.153.15.
As you can see below, ...
3
votes
3answers
441 views
LACPDU packets to pass through unmanaged switch
I have two buildings connected through the CAT6 cable and both ends have cisco-sg350 (capable of etherchannel). Due to the limitations of the cable both the switches are connected through a unmanaged ...
1
vote
2answers
58 views
Clock Synchronization in a Network
I had a query in Clock Synchronization in a LAN.. If we already have clock synchronization in a network with the help of preamble field in an Ethernet frame.
Why should we need still protocols such ...
1
vote
1answer
35 views
Port mirroring question
I've got some questions about my port mirroring configuration. I'm working with alcatel omniswitch.
After configuring port mirroring my destination port is loosing network connection and it can't ...
0
votes
2answers
58 views
How can i find which cisco switch port is connnected to specific port of Fortigate?
there is any way to find that which switch port connected to mgmt port of fortigate?
for example can i enable lldp on Cisco switch and Fortigate together?
Fortigate 1500D (version 5.6.2) and switch is ...
0
votes
1answer
26 views
STP Shut Down Port for Camera on HP Procurve
I have a VLAN dedicated for camera devices. We have learned that some camera ports keep going into the down state, and the logging indicates it is caused by STP:
sw404(config)# show logging -r 7
...
1
vote
2answers
83 views
Cisco Catalyst 9410 - Using Default Gateway versus ARPing for locally connected host
I may be missing something extremely simple here, but im at loss trying to figure out what this Nexus switch is doing.
Here is the topology:
DISCLAIMER!
I had made a mistake on the diagram by ...
1
vote
1answer
48 views
Can different VLANs have same subnet? [duplicate]
When talking about VLANs I often see examples like this:
VLAN 10 - 10.0.10.0/24
VLAN 20 - 10.0.20.0/24
Different subnets yet different VLANs. I understand this is a must if we want communication ...
0
votes
1answer
42 views
Setting all switchports as tagged for 200 x VLANs?
question:
should I expect any performance hit from enabling 210x tagged VLANs on ALL 24x ports of a switch (or alternatively setting ALL 24x ports as trunk ports)
background / equipment:
We have a ...
0
votes
2answers
38 views
Is datagram switching only possible with routers?
So datagram switching is when packets from same original message travel different paths from source to destination. This cannot happen with switches because switches would just run STP thus ...
0
votes
3answers
68 views
Bridges, hubs, switches and repeaters in subnetting
I'm learning to subnet and I'm constantly doing exercises on paper about this topic. I'm trying to breakdown a network into smaller subnets, given the number of hosts for each one. For now, I only ...
1
vote
1answer
83 views
dhcp client not receving the ip address using two switches
1) In Router 4(R4)
i have configured the 2 dhcp pool. first dhcp pool with ip address 150.10.10.0/24 and second one with 150.20.10.1/24 in subinterfaces f0/0.1 and f0/0.2 and encapsulated using (R4(...
0
votes
2answers
86 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 ...
0
votes
1answer
32 views
I have a small managed switch I want to use as the default gateway for my subnet, but something isn't working
Not a networking guy by trade, but I know enough to get myself into some trouble. And I think I've managed it. I need to set up a DHCP server on a PC for a small subnet of 3 or 4 devices. I have ...
0
votes
3answers
69 views
Regarding Cisco's hierarchical network design
why routed ports usually implemented between the distribution layer and the core layer ? why not just extend the layer 2 domain to the core layer ? is the other design model more practical than this ...
0
votes
1answer
22 views
Broadcast Timer [duplicate]
This question is regarding in the process of L2 MAC Address learning.
As we know, if a sender sends a packet to some receiver host which switch doesn't know, it will broadcast for learning.
Assume an ...
0
votes
3answers
122 views
Do routers understand transport protocol?
We are taught about the difference between hubs, switches, and routers. A hub is a layer 1 device, it only knows layer 1 and doesn't care about layer 2 and above. Similarly, a switch is a layer 2 ...
2
votes
0answers
61 views
C2960 - Memory has insufficient capacity
Please, do you know if there is any way on how to release more processor memory from a C2960 switch without restarting it?
I am receiving an insufficient memory alarm from this switch. I noticed that ...
0
votes
1answer
88 views
Will this network diagram cause broadcast storms?
I have three VLANs, and I want to communicate between them, but all packets are dropped. I made a trunk to allow all VLANs.
Should I use STP to control broadcast storms?
0
votes
1answer
98 views
Help with VLANs on Meraki MX
I have a Meraki MX84 in Routed mode with a Default 10.10.0.0/24 subnet and then VLAN 10.10.3.0/24 ID 3, VLAN 10.10.4.0/24 ID 4, VLAN 10.10.5.0/24 ID 5, and 10.10.8.0/24 with ID 8. All ports on it are ...
0
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2answers
78 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
45 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
44 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 ...
1
vote
1answer
254 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
201 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
64 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
30 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
92 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
163 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
77 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
25 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
548 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
223 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
709 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
33 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
45 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
182 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
64 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
651 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
44 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
416 views
Spanning tree Priority values
show spanning-tree interface gigabitethernet 0/2
Switch default
Instance Role State Cost Prio type
-------- ---- ----- ---- ---- ----
MST00 ...
0
votes
1answer
421 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
112 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
168 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?
