Switches (in the context of this site) are devices with multiple network ports, which allow interaction between all devices connected to these ports. Basic switches operate at the data link layer level (in TCP/IP networks) and forward packets based on the link layer address in the packet headers. ...
0
votes
2answers
18 views
D-Link DGS3100-24 vlan settings
In the vlan settings on the D-Link DGS3100-24 there is a default vlan with id 1 with settings to "Untag VLAN Ports" T1-T32.
All other vlans user port 1-24 in their settings and the switch only have ...
0
votes
1answer
33 views
Are both IP address and default gateway needed on a switch to enable communication between different vlans?
I know that a router is necessary for VLANs to communicate with each othe, but I would like to know if both IP address and default gateway need to be configured on the switch in order for different ...
1
vote
1answer
54 views
Inconsistent local network behaviour
I'm in an institution with a local area network with multiple labs, all of which access the net through a common proxy, set up in the client browser/app manually, now in one of the labs, the following ...
1
vote
0answers
19 views
Duplicate packets on network after disconnecting wireless access point on separate VLAN
We have a network with a few switches. One of these is a 3com 4500, where there are many computers connected, a custom linux firewall and a wireless bridge. The port where the wireless bridge and the ...
1
vote
1answer
33 views
Netgear GS752TXS 10gbe
I was looking to link up a NAS and a Server via this switch http://support.netgear.com/app/products/model/a_id/19324
Then use it to build out the rest of the network in a small office server cabinet. ...
0
votes
0answers
26 views
Please help me decide what I need for a small business network [closed]
I have a network at a small office (about 15 employees) that is often going down briefly or becomes impossible for certain computer to join unless the whole router is restarted. I am thinking of ...
0
votes
3answers
39 views
TCP Port prioritizing on switch/router (QoS)
I have some HP ProCurve series Switch. There is a QoS option for prioritize traffic by TCP/UDP port. I set two ports: one with highest priority and another with lowest. Then I performed tests to ...
-2
votes
2answers
51 views
Are Cisco access ports basically the same thing as a port on an unmanaged switch?
The title should say it all..I'm trying to learn more about VLANs, tagging/trunking, etc.
6
votes
2answers
144 views
Need a gigabit switch that can be PoE powered [closed]
I'm in need of a gigabit switch that can be powered via PoE. There isn't any A/C power in the area. Suggestions?
-1
votes
0answers
47 views
Networking infrastructure [closed]
We are currently looking for network devices to support an environment consist of 10's of servers where all of them are hosting VMs. (High number of VMs in total).
Now we are on the stage of buying ...
0
votes
1answer
65 views
ARP Connectivity on cisco small LAN
I feel so lame to have this doubt, so there is the question : Why do I not have connectivity ?
The case is simple, I have configured the topology and have connectivity between each PC and respective ...
-4
votes
1answer
38 views
how to make the switch populate the x-forwarded-for header
There are two application servers(IIS). There is a switch or a virtual IP which load balances requests for the 2 servers.
I need to track requestor(client) IP address from my .NET application.
The ...
0
votes
1answer
36 views
testing ports on a Nortel Networks switch
I'm trying to test a number of Nortel Networks BayStack 470-48T switches. I can connect a machine per port, but it's a 48 port switch. I have two machines, and my plan was to plug one in and move the ...
0
votes
1answer
65 views
What is the best way to connect a dual LAN server to two trunked switches?
In an older quetion "Best practice to trunk two GB switches?" I asked about how to trunk two switches. I now used a static link to connect them and it runs well. Now I am not sure on how to connect ...
73
votes
8answers
4k views
Can you mount a network switch upside down?
We just took delivery of a new Avaya 2500 48-port switch, that has 24 PoE ports. The problem is that all the PoE ports are on the left-hand size of the switch, and our PoE device cables can only reach ...
6
votes
3answers
328 views
Do switches sometimes need rebooting?
In your opinion, do switches sometimes need a restart?
I'm asking this because today our NAS stopped working properly, and was only fixed when we restarted the switch it was attached to.
0
votes
1answer
55 views
DELL switch CAM table don't show MAC from different network
I'm solving problem with slow DHCP request/respons about 45 secs...toplogy is [L2] DELL 6248 -> [L2->L3] router (cisco) -> firewall Debian server with DHCP -> gateway to internet
I think that problem ...
-1
votes
2answers
136 views
VLAN routing issue
I have HP Procurve Switch 2910AL-24G.
Please see attached configuration.
Client inst2is01 (10.247.167.80) and VLAN ID is 37
Server ILO (Management Port) IP : 10.247.172.70 and VLAn ID is 54
From ...
1
vote
3answers
141 views
multiple subnets on the same cisco switch port
We have several servers on colocation and now trying to re-organize the network by utilizing Cisco ASA 5505 as a router and Cisco 3750x series switch.
Network topology is looking like that:
...
2
votes
1answer
107 views
iSCSI aggregation using one switch
Thinking of doing 2Gb aggregated iSCSI between a VM Host and a multi controller iSCSI array. Multipath with two switches is normal for this, but I only have one switch at the moment. But the switch is ...
0
votes
1answer
94 views
DELL PowerConnect 6248 switch - Admin Port Speed 1000M nowhere to be found
This is driving me crazy.
I'm configuring the switch from the web interface.
Under: Switching > Ports > Port Configuration
I disable 'Auto Negotiation', I set the 'Admin Duplex' to 'FULL', I click ...
0
votes
3answers
112 views
Physically switching between two network cables
I am looking for a small piece of hardware that will allow me to physically switch between two network cables, similar to how a KVM switch works. That is, there are two ethernet input cables to switch ...
0
votes
1answer
57 views
Branch Office Switch Redundancy
We're setting up a branch office with no dedicated IT person (all IT support is remote from HQ) and trying to make the infrastructure as redundant as possible. We've dealt with Internet and power, but ...
1
vote
0answers
110 views
Hp Procurve Switch : port filtered
My HP Procurve switch is blocking port 22 and I dont know how to unblock it.Please let me know
From the server, see port 22 is blocked
[root@server ~]#nmap -p22,80,443 10.247.172.70
Starting Nmap ...
0
votes
2answers
57 views
Linksys SFE2000 Interface
I have a real problem with a layer 3 Linksys switch.
First, every time it looses power, it seems to reset back to an older config. Not only this, but when this happens it looses interface settings on ...
-1
votes
3answers
163 views
Why does a wired network slow down with user increase?
If you had a wired network, 20 PCs hooked up to a 100 Mbit/sec switch (same onboard ethernet port speed) and you were just sending some test data round. What is the technical explanation as to why 20 ...
0
votes
1answer
26 views
IBM Rackswitch G8000 SNMP Temperature OID
Google hasn't been my friend today.
Does anyone know the OID for temperature statistics on Rackswitch G8000's?
1
vote
2answers
58 views
Spanning-Tree and redundant links
I have 2 switches which have redundancy between them, meaning fa0/1 on SW1 is connected to fa0/1 on SW2, and fa0/2 on SW1 is connected to fa0/2 on SW2.
Both of the switches have the same BID, however ...
7
votes
2answers
201 views
Architecting your network when you run out of VLANs
This is an entirely hypothetical question, I'm not in this situation now.
What happens to your VLAN topology and routing if you run a multi tenant network and you have more than 4096 customers?
Do ...
6
votes
1answer
182 views
Is bonding mode=5 a solution against MAC flapping?
There is two are interconnected Cisco WS-2950T.
By the one GBIC port on first switch connected a first NIC of bonding interface, and by the one GBIC port on second switch connected a second NIC of ...
0
votes
1answer
90 views
Backing up Initial and Running configurations for Nortel Baystack 325-24G
I recently came across a Nortel Baystack 325-24G switch. This is the first time I've come across a Nortel device of any sort, so I am a little intimidated. My problem is that I have been trying to get ...
0
votes
2answers
99 views
Practical difference between CISCO C2960PD-8TT-L and Netgear ProSafe GS108P
So I'm setting up a new department and doing some shopping for our new 4 developer team. I need to get some switches so that each member has at least 2 ethernet ports +1 with POE for an IP phone (1 ...
3
votes
1answer
234 views
1000 Mbit/s fiber switch to 100 Mbit/s fiber switch - no communication
This morning, I troubleshooted a fiber connection between two switches in the same building. It was a single-mode fiber. I knew this fiber was fine, because I had installed it myself and tested (with ...
2
votes
1answer
99 views
How to trunk multiple ports into one?
I'm aware that trunking is a VLAN concept wherein multiple 802.1Q-tagged packets travel over the same route. Instead, what I'm looking for (perhaps I got the term wrong) is to have two ports from one ...
1
vote
1answer
113 views
ProCurve 2610 Java error?
I've got two identical procurve 2610-24/12PWR switches with the web interface configured. I can log in to one and see all the management info just fine. When I load the web interface of the other ...
51
votes
1answer
1k views
What happens when you plug two sides of a cable to a single networking device?
What is likely to happen when you plug two ends of a network cable to a single switch/router? Will this create problems on the network, or just be ignored?
1
vote
1answer
196 views
How to connect to a Netgear SRW224G4P serial console port?
I have two Netgear SRW224G4P switches with serial console ports. I'm using a Sabrent USB 2.0 to serial cable adapter with a female-to-female serial cable. I'm running Windows 7 64-bit and using putty ...
4
votes
2answers
245 views
How to prevent or block other DHCP servers?
Is it possible in a managed switch such as a 3com 4500 or a HP Baseline PWR-Plus type switch to block DHCP from being served through specific ports, or all except 1 port?
I have a DHCP server for ...
0
votes
2answers
104 views
How can we tell our switch is dying?
We have two dell powerconnect 5324 (about 5-6 years old).
For the last few weeks, we have been seeing connectivity warnings for 2-3 minutes ata time for unkonwn reason (colo says everything is fine, ...
8
votes
3answers
224 views
Cut network cables in Cisco 2960 PoE
We've a Cisco 2960e that services our VoIP phones and other things. I inherited it.
The question I have is the cut cables: there are about four network connectors that are cut about 1cm away from the ...
1
vote
1answer
219 views
Netgear GS108E switch, requires external ``management'' software?
Does anyone know if the so-called ``management'' features of the NetGear GS108E switch require external software to enable these features? Specifically, the port monitoring and VLAN features. One ...
0
votes
1answer
130 views
Are you able to save the running-config on Nexus Switches
I have been trolling Cisco sites and have not been able to find an answer to this questions.
Are you able to perform a write mem or likewise to save these configs on Nexus 5000 switches?
1
vote
1answer
98 views
Networking Cisco: adding 3750 Switch to existing Stack
Can any one advise about what will happen to my existing switch stack when adding an additional slave switch?
I'm trying to confirm whether this will cause a temporary outage to my network or will ...
0
votes
2answers
228 views
DELL 6224 switch strange behaviour
I'm having a hard time with my DELL 6224 switch.
This switch is the center node of my network, trunking between other switches, VLANs and routing packets.
The network traffic that it's been handled ...
1
vote
2answers
211 views
Serial to ethernet cable: how to connect to device
How can I use a serial to ethernet cable to connect to a device: in my case a
Hp ProCurve AP?
A serial to USB or serial to serial would have been great but I found this serial
to ethernet cable from ...
0
votes
1answer
137 views
HP E3800 series Web GUI times out
I am having some trouble with the web interface for my new E3800 (3800-48G-4SFP+ Switch (J9576A)). I have two of them stacked in a ring topology. When I restore to the factory default and add an IP ...
2
votes
4answers
174 views
Can a switch be noise reduced?
We have a 24 port switch in a metal closet, and despite this, it still makes a great deal of noise.
Are there ways to noise reduce switches?
0
votes
1answer
184 views
How to enable ssh on extreme summit x450e-24p and x450e-48p switch?
How do you enable ssh on extreme summit x450e-48p and x450e-48p switch for secure login. Do I need to purchase a license for that? I haven't found any commands on switch cli.
0
votes
2answers
92 views
About the MAC table on switches?
I'm learning the network basics at my university this semester. I had a question on the mid-term exam and unfortunately ,I answered it wrong. I have a final exam about an hour from now, and I still ...
0
votes
0answers
8 views
Can I assign Allied Telesis 9424 a LAN IP?
It has a WAN IP. I want to add a local IP too. Is it possible? Plus, does anyone know is there any specific http address & port to manage the device from the web, instead of console?
