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. ...
1
vote
1answer
23 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
1answer
40 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
107 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 ...
-1
votes
0answers
52 views
Connecting multiple switches [closed]
One more time..
We have following equipment in a rack:
20 x HP v1910-24G 24-port switch
1 x 3Com 4200G 24-port switch
1 x 3Com 3824 24-port switch
Switching capacity / throughput:
HP v1910-24G - 56 ...
0
votes
1answer
17 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 ...
-1
votes
0answers
88 views
Connecting multiple switches in rack [closed]
We have following equipment in a rack:
20 x HP v1910-24G 24-port switch
1 x 3Com 4200G 24-port switch
1 x 3Com 3824 24-port switch
Switching capacity / throughput:
HP v1910-24G - 56 Gbps (41,7 Mpps)
...
0
votes
0answers
19 views
Migrating to virtual network [closed]
Hi all I'd like to migrate my company infrastructure to a vSphere 5 infrastructure.
I'll have two Windows Server 2008 domain controllers, one file server and a SQL Server.
We have 3-4 TB of images ...
-2
votes
0answers
18 views
Should I wire directly to the basement for ethernet, or have a switch connected to another switch? [migrated]
I have a project where I'm wiring my home for ethernet. I have four bedrooms upstairs, all of which are getting two ethernet connections each, and then a few rooms downstairs as well. I was thinking ...
2
votes
4answers
106 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
53 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
75 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?
4
votes
1answer
47 views
SNMP MIB file resource
My company(ISP) has 50+ switch models in our network, we manage them via SNMP from our web based intranet, for some Huawei switches we can't figure out the OID's we need (we usualy figure the OID we ...
1
vote
1answer
67 views
Spanning tree problems in a shared HP ProCurve environment
we're sharing a server room with another company, including the network infrastructure. All the switches are HP ProCurve, in various models depending on port need and so on. We're using VLANs to ...
14
votes
3answers
720 views
How does network sniffing software work over a switch?
We have several of standard non-managed 3com switches in a network. I thought switches were supposed to only send packages between peers of a connection.
However it appears network sniffing software ...
0
votes
3answers
79 views
SFP Tranciever Cost. Use CAT 6 over short distances?
Hello I have two HP V1910-48G, which from my understanding are re-branded 3Com products. I'm running out of ports on both switches and both are deployed in different scenario's.
1) I need more ports ...
1
vote
0answers
51 views
Basic QoS policy for Dell 6248 switches
My cisco edge router tags all incoming packets as IP precedence 0, 3, and 5 depending on their priority. How can I add a matching QoS configuration on the switch so that packets are prioritized ...
0
votes
2answers
48 views
set PROMISC mode for switch in Linux
How do I set the promisc mode on for a switch. I have two SW like below:
root@chandler:~# brctl show
bridge name bridge id STP enabled interfaces
br0 ...
0
votes
1answer
103 views
Cisco Switch connected to 2 routers
I have following setup:
The router on the left is a router on a stick to route traffic within the LAN that has different VLANS.
The left switch is the root switch for our LAN and works as the VTP ...
2
votes
2answers
59 views
How should dual failover routers be switched on the WAN side?
This might be a highly daft question so apologies in advance... I have the following set up:
100 Mbit on 1Gbit carrier Fibre line into comms room,
Fibre <-> EDD (ethernet demarcation device)
EDD ...
5
votes
1answer
232 views
2 ethernet connections between two Switches
I'm setting up servers at our new office and I brought a spare managed switch with 2 Gig ports to run all of our phones(VOIP) and workstations.
Now for the servers I've got a separate gigabit ...
0
votes
1answer
106 views
Recommend a nice managed Top Of Rack switch for Linux Computer Cluster (but it has to be cheap!) [closed]
I work at an industrial research lab, and we have a research group that's building up a Linux-based compute cluster. The have about 46 nodes so far, with more to come. They came to us a few months ago ...
1
vote
2answers
129 views
What is the name of the cable (RJ45 to RJ45) that can be used to connect from a KVM to Cisco serial port?
As everybody knows Cisco's console ports are RJ45. However, the cable they come bundled with is DB9 to RJ45. We have a KVM that allows managing network devices via a serial port but the port on the ...
2
votes
2answers
94 views
cisco: get mac address from cdp neighbors
I need to find out the MAC addresses and ports of devices connected directly to a Cisco switch, preferably via SNMP. the best way i found is with CDP neighbors, but i don't find the MAC addresses, ...
0
votes
0answers
45 views
Enabled Flow Control on PowerConnect Switch port - No more connection
I have enabled Flow Control on one port of my switch (Dell PowerConnect 5324). Then I saw that I had no more connection with the host connected to that port, I cant even ping it.
Then I disabled Flow ...
2
votes
1answer
82 views
Guessing how switches are wired together with minimal information
Given a switch S1, I’d like to guess the target port of a switch S2 to which it is wired.
I can get their updated Mac Address Table (some say Address Forwarding Table) and that’s all. I can’t enable ...
0
votes
0answers
29 views
File transfer - Bandwidth dropping down, following a pattern
This is what I get from the destination server while transferring a huge file to it over the LAN.
The screenshot has been taken during the file transfer, I did not paused anything, the transfer was ...
3
votes
1answer
49 views
Network issue - Very slow while RXing but TXing is fine
I am trying to transfer a 10GB file to test my network. But when I transfer from Workstation 1 to Workstation 2, it takes 8 minutes (which is fine). But from Workstation 2 to Workstation 1, the ...
5
votes
2answers
108 views
Cable management strategy for a small chassis switch
I'm working with a small site buildout that contains a single HP ProCurve 4200vl chassis switch. The data cabling contractor did not provision for any cable management. I'm looking at the rack ...
4
votes
5answers
194 views
Cisco switch, how to determine MAC address of connected device or wake device up?
switch1#show interfaces descri
...
Fa0/13 up up
Fa0/14 down down
Fa0/15 up up
...
(the ...
4
votes
3answers
165 views
Several switches vs one switch for on LAN of 60 computers?
A. Is using one network switch is faster vs 3-4 network switches connected together in same room?
B. Is there difference in speed at all between cheap switch and more expensive model?
P.S. network ...
2
votes
0answers
52 views
Q-BRIDGE-MIB representation of ports on Dell PowerConnect 6248
I have a Dell PowerEdge 6248 with a 2x10Gb uplink module. I'm trying to make sense of the representation of the ports from the following snmp output:
Q-BRIDGE-MIB::dot1qVlanStaticUntaggedPorts.4081 = ...
4
votes
3answers
105 views
How do I test the increased bandwidth after setting up LACP?
I have setup LACP, and LAG on our Netgear Switches (GS724T). I have bound(?) two ports together to create one 2Gbps connection between two of the switches.
I was wondering if there is a way of ...
0
votes
1answer
135 views
Netgear GS724T port issue between two switches
We have three 24 port (Gigabit) Netgear GS724T switches which are connected in the following way:
SW-003 > SW-001
> SW-002
The port on SW-002 that connects to Sw-003 is constantly ...
0
votes
2answers
72 views
Managing managed switches
I have a number of Dell PowerConnect switches. I've successfully setup various 'trunks' and vLANs and all working sweet. But one thing annoys me. I can't seem to 'manage' my switches from my laptop as ...
2
votes
1answer
70 views
Managed switch port-based DHCP allocation - general case?
I saw a strange comment bagging IT departments (i.e. sysadmins) on Slashdot the other day:
half the time they cant even do a simple thing like provide a jack with a set IP address for us
Reading ...
0
votes
2answers
78 views
Teaming on Cisco Catalyst switch
Hopefully an easy one for someone...
If I'm setting up either an MPIO or Team/bond on a Windows server, does a channel group need setting up on the Cisco Catalyst switches that they're connected to? ...
0
votes
1answer
89 views
Multiple ethernet interfaces without PCI LAN cards
I want to have multiple Ethernet ports on my Ubuntu server 10.04. As multi port LAN PCI card are expensive, I am planning to use a cheap managed switch. The cheapest one I found was Netgear GS108T. ...
1
vote
1answer
55 views
vlan 1 and 1002-1005 in a trunk connection-should they be allowed?
If I have a trunk connection that should allow only two VLANs(100 and 200 for example), is it neccessary to also allow the default vlan 1 or VLANs 1002-1005. I am trying to configure a switch port for ...
0
votes
1answer
43 views
eth0 will not connect to mirror port on switch
I have a Ubuntu setup with 3 network interface and I also have a HP Procurve switch with port 1 configured as a mirroring port.
However, eth0 does not connect when I plug a cable to port 1. When I ...
17
votes
3answers
325 views
What happens when a consumer switch receives a VLAN-tagged Ethernet frame?
Suppose you connect a trunk port from a VLAN capable network switch to a (VLAN incapable) consumer-grade network switch via a direct cable. Now the former switch send the later switch a 802.1Q-tagged ...
0
votes
1answer
96 views
VLAN on multiple switches?
We have a small network with two managed switches and two unmanaged (basic netgear 10/100) switches.
I would like to get to grips with VLAN's after creating another subnet. Currently we only have one ...
6
votes
1answer
107 views
If fiber runs 1gig fine, are there any concerns when considering upgrading to 10gig transceivers?
We had fiber installed (connecting ~10 buildings) around 5 years ago and it has been working great. The initial setup involved Procurve 2848 and 2824 switches w/ 1gig transceivers. However, lately we ...
-1
votes
1answer
75 views
How do I connect to a cisco switch of my network?
I recently adquired a cisco switch 2960G24TC, I installed it on the rack of my servers and everything is ok, but how do I login the switch? it does not have an IP address, how do I login through ssh ...
-1
votes
1answer
152 views
Howto setup EtherChannel in between two cisco switch 2960
I suddenly must configure two cisco switch 2960s within the same network, basically the idea is that through two cables they will physically be connected but logically, in each switch, two ports must ...
0
votes
1answer
42 views
Switches and the amount of load
Out of curiosity does anyone know whether it would be more beneficial to have more switches with less terminals on each leading to your main switch OR load up each switch fully before having any ...
0
votes
1answer
29 views
Cisco non-designated
Suggest I have two switches with two links to eachother, is there a way to manually set the non-designated port ? (apart from changing the speed on the port)
1
vote
2answers
114 views
DELL Switch Configs
I"m not a networking expert so I was looking for advice on finding the best tool out there for automatically downloading copies of our switch config periodically and saving to a shared storage.
Any ...
0
votes
1answer
109 views
Uplink between switches, uplink to a server?
I have two switches with 24 10/100 ports and 2 GE Uplinks. There is also a server connected to one of the switches. End users attached to both of the switches use the server's content. I assume I ...
0
votes
1answer
54 views
Move a Production Switch from One Rack to Another
Is there any good way to move a live, production switch from one rack to a second, nearby rack? The switch does have redundant power supplies, plus we have a HotPlug ...
