Tagged Questions

0
votes
0answers
31 views

Switch Linksys DHCP offering lease without sucess

I have a Linksys switch srw224g4 with 4 vLans. It´s connect to my router MIkrotik RB450G. The VLANs work fine, when I plug my notebook with Win7 to any port, it gets the correct IP and everything ...
0
votes
2answers
49 views

Duplicate IP on network and layer 2 devices caching

I have two identical VMs (Windows XP guests). I use KVM for the hypervisor. The first one is running, the second is a clone of the first not yet running. I edited the config for the second one to ...
1
vote
1answer
129 views

Setup Network with two ISP

Currently I have a network with 1 ISP, a router/modem, Gigabyte Switch and a server. All the clients PC are automatically assign IP from DHCP server from a Router/Modem A. Server A have a fixed IP ...
0
votes
2answers
65 views

Assign IP range per switch?

Is it possible to handout IP ranges per switch with the use of one DHCP server? Example, i have 2 Swicthes (A & B). I like to: switch a => 192.168.1.50 - 192.168.1.75 switch b => ...
4
votes
2answers
179 views

What would cause a PBX or SIP phone to not register on the network when using Netgear Switches?

We have 3 different types of switches in our network. All of our IP Phones are running on HP 2520-24 PoE switches. Our primary backbone is "supposed to be" running on Netgear GS748T switches. ...
0
votes
2answers
114 views

How can you designate a DHCP server?

I have a client that has a DHCP server for voice and a DHCP server for data. They have both voice and data on the same VLAN (I know, not ideal). Some of the computers are getting DHCP addresses from ...
1
vote
1answer
185 views

How to set a DHCP filtering in a switch port (RackSwitch G8052)?

How can block/filter the DCHP traffic from one port in a managed switch? We are using RackSwitch G8052 switches. And I want to block both, client (DHCPDISCOVER,DHCPREQUEST) and server ...
-2
votes
1answer
163 views

Can I configure my Negear WGR614v7 to treat DCHP traffic like a hub? [closed]

I have a Negear WGR614v7 wireless router (Hardware Version V7, Firmware Version V2.0.30_2.0.30NA.) I've configured a Windows Server box to act as a DHCP server (among other things.) My DHCP server is ...
0
votes
2answers
191 views

One ISP, two switches, two subnets

A quick overview of my environment: Network A: One gateway/DHCP server connected to multiple ISPs and connected to the switch One Netgear GS748T 48 port switch (and a few trunked switches for the ...
4
votes
2answers
2k 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 ...
2
votes
1answer
250 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
128 views

Provider cable in switch? [closed]

Is that possible to get internet connectivity if cable will be plugged into switch port? Something like that - Provider - Switch - Router. Switch is a L2 managed unit, and router running RouterOS. ...
1
vote
1answer
608 views

How do I wire a Windows network? Active Directory/DNS/DHCP Server

I am building a windows based network for my 'medium sized' business and I am only used to linux/mac networks. Any help is greatly appreciated! :) This is the setup I have: T1 from at&t, and a ...
0
votes
2answers
344 views

Networking — intermittent dhcp issue

We have an office network with a sonicwall TZ190 firewall and four daisy-chained switches, the first three 24 port 3com switches, the last one an older 12 port Cisco switch. (I know this isn't a great ...
2
votes
4answers
584 views

Determine switches between devices on LAN

I'm on a network where most devices are DHCP. If I have a few switches between device A and a DHCP server, how can I find out what they are? traceroute just gives me 1 hop, regardless of the number ...
1
vote
2answers
132 views

Bootrequests coming from Cisco Switch

I have two Cisco switches that are sending out DHCP BootRequests and they're hitting my firewall about once a minute or so. What is it trying to do? How can I stop it?
2
votes
3answers
1k views

Router DHCP not working with switch

I just hooked up a Dell PowerConnect 2824 in 'unmanaged mode' into our network and our router, a DLink DI-524, will no longer apply IP addresses via the DHCP to anything connected to the switch. In ...
5
votes
8answers
2k views

What equipment do real ISP's use? [closed]

In a dormitory of 550 residents, people often mistakenly set up DHCP servers for the whole network by plugging in their private Wi-Fi routers wrongly. Also recently, someone mistakenly configured ...
3
votes
6answers
2k views

Why do partially failed/failing switches fail to pass DHCP?

I've noticed this several times: a switch starts to behave oddly. Usually if the switch doesn't fail outright, what tends to get noticed is that DHCP doesn't work. We had a Linksys SRW-224P fail ...
0
votes
1answer
205 views

Router, switch configuration in linux

Can someone suggest a good back for router and switch configuration in linux. I also want to configure dhcp, dns and other stuff. Regards Bala
3
votes
3answers
236 views

IP conflicts with a networked printer

I have 2 computers (Mac with OS 9 and a desktop PC (XP)) that both print to a networked printer (large Xerox Phaser 7700). The printer and the two computers are networked through an old ethernet ...
2
votes
2answers
265 views

DHCP serving to iSCSI arrays through linked switches

ok - this is beyond my expertise so I need to ask here. I have a bunch of test hardware that I'm configuring and I'm running into some network problems where I'm not an expert (talk SQL Server to ...