Questions tagged [switching-modes]

For questions about switching modes on network devices, where the switching mode determines whether the switch begins forwarding the frame as soon as the switch has read the destination details in the packet header or waits until the entire frame has been received and checked for cyclic redundancy check (CRC) errors before forwarding them to the network. For instance, you want to change the switching mode from the standard Cut-Through to Store-and-Forward.

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2answers
35 views

Tagged frames onto untagged (access) port!

have been trying to understand ingress behaviour on untagged port, specially w.r.t tagged frames. On going through ieee 802.1q doc, i found this (8.6.2) : "Each Port may support an Enable Ingress ...
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2answers
29 views

Sending tagged traffic to untagged port?

What happens when an untagged port receives tagged frames, whether they are dropped or not !?. Say, A computer is connected to a switch on untagged port (as most would recommend). On it I have used ...
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0answers
45 views

Packet Processing Limitation of OpenFlow Pipeline in Hardware Switches

I have a 10Gbps network containing 2 servers (DellPowerEdge 4700r) and a hardware switch ( ARUBA 2930F) in between. The two servers are connected via 10G SFP+ ports to the switch. I send TCP traffic ...
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1answer
85 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(...
2
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1answer
93 views

2960 x Switches Stacking

can we have POE & NON POE Switches Stacked in on loop Exp( 2 nos of 2960 X 48 FPDL and 2 nos of 2960x 24 Port TDL
2
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1answer
232 views

Broadcasting in L2 Switch

Hey guys, This is a Noob question. When a broadcast frame is received on a switch from a specific port, will it be automatically destined to all the ports in a switch ? ---------- (or) ---------- ...
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3answers
3k views

Connecting two switches with an access mode port

I manage a switch, and I saw that on one interface there were 19 different MAC addresses, all of them on the same VLAN, so I guessed that there was a switch connected to that interface. Since all MAC ...
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1answer
288 views

Why Switching Modes and when to use one of the other?

With Cisco switches you can pick to use one of the three modes: Cut-through, store-and-forward and fragment free. Not mentioned is why you would use one of the other or use the higher latency one ...
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2answers
3k views

How many PoE ports can I use on a switch?

So, I want to connect 23 Ap's using PoE. The Switch is a 500w 24 port switch. May I use every single port with PoE without causing trouble on the Switch? Thanks! Edit: It's a UniFi switch of 24 ...
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2answers
167 views

Can't establish the connection for switch

I tried to establish an old switch in site, but VTP is not working. Show cdp neighbor Got the next switch with this command. Model: WS-C2960-24TC-L Version : 12.2(53)SE2 I tried to add the ...
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5answers
1k views

Inter-VLAN Routing

I am trying to configure inter-VLAN routing, but I can't route using MLS. I attached the image. Please check and give the answers. In switch0 I created VLANs 2 and 4; in switch1 only VLAN 3; in ...
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3answers
1k views

Switching mix of Ethernet speeds?

I was explained that in order to support many types of speeds with a switch (i.e. one port is for instance 100 Mb/s and the other is 1 Gb/s), store-and-forward mode is required. I would like to ask ...
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2answers
15k views

Switch Fabric Capacity vs Forwarding Rate

What is the difference between Switch Fabric Capacity and Forwarding Rate of a switch? Also, what other types of speed or bandwidth are there for switching?
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2answers
873 views

Full and half duplex 100 Mbs on the same switch

At one point, we had a system which performed best when is 100/MB half duplex mode. (purely anecdotal evidence). It was plugged into a switch with other systems running at 100 Mbs full. Seemed ok and ...
3
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1answer
1k views

How does message switching compare with other switching techniques?

How does message switching fit in this comparison table here? Are these 4 switching work at different layers in the OSI model?
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3answers
2k views

Circuit and Packet Switching

I'm struggling to understand 1 or 2 things about packet and circuit switching. In circuit switching, resources are not shared and a it's guaranteed full capacity to the call right? They are "reserved"...
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5answers
88k views

About the switchport mode

I am new to network Engineering. I find it is hard to distinguish and understand different switchport settings. Why can I have a switchport set to access, auto, or dynamic? What are they used for? ...
21
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3answers
4k views

CEF operations on L3 switch vs router

I understand that L3 switches use CEF for faster packet forwarding. However, CEF will not work for packets that need to undergo NAT. Does this mean CEF isn't used by edge routers and edge L3 switches? ...
19
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3answers
4k views

What is the difference between all the switching modes on 6500/7600?

On one of my routers, I see the following switching modes: #show fabric switching-mode Global switching mode is Truncated dCEF mode is not enforced for system to operate Fabric module is not ...