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0answers
444 views

HP ProCurve & Cisco switches interoperability

I have a couple of questions regarding Cisco and HP ProCurve interoperability. Here's a link to pdf with my network topology. Can someone help me with basic VLAN configuration in such topology? Below ...
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1answer
769 views

Firewall with layer 3 switch or without it?

I am trying to make a simple network architecture for a small company. One of the sites is built of a firewall (to create a DMZ, to make the VPN between the sites) and three switches, like in link ...
4
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1answer
526 views

LAN segregation for security reasons using VLAN

I was asked to segregate the testing environment in our network to improve our security. Our structure includes: 1 switch Dell Power Connect 3448 1 switch Dell Power Connect 2748 A few 5 ports Star ...
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2answers
3k views

Vlan Management Policy Server ( VMPS) Configuration and Management

I am trying to design a topology in which I need to use VMPS and unfortunately the resources are rather few on the internet. Based on this Configuration document VMPS I have created a sample ...
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2answers
2k views

How can I provision/control bandwidth allocated to devices on the LAN?

We're going to have an ISP turn up a 100 mbit circuit at our office building (multiple floors, multiple offices). We need to control how much bandwidth is allocated to/used devices on the LAN. For ...
0
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1answer
165 views

cisco 3825 to 3825 routing question

I have 2 cisco 3825 routers connected to two cisco 3560 switches. One is currently our main router with 3 /22 public addresses and the usual slew of rfc1918 address space routed around for internal ...
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1answer
2k views

What would cause SIP traffic to be seen going into a switch but not coming out?

Background I have been struggling to get my SIP phones to register behind a brand new router and switch in our brand new office. Our PBX is hosted offsite. I have worked with our provider to attempt ...
0
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1answer
962 views

Link Aggregation between DELL PC2724 and Cisco Catalyst 3750

I'm trying to configure Link Aggregation between my two switches, on the DELL switch, there is only an option to include a port in a "LAG Group." On the Cisco's I've tried creating an EtherChannel ...
0
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1answer
268 views

Layer 2 and Layer 3 switch migration

I just started a new gig and am trying to pick up our networking infrastructure as quickly as possible. We have 8 fiber runs located throughout the building in different parts. All the local devices ...
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2answers
612 views

Can ISPs block IP addresses? How feasible is this?

as far as i know, most of the time ISPs change the IP address-URL association in their DNS servers, so the URL is redirected to a page which displays the user a "this site is blocked" page. if an ISP ...
5
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5answers
2k views

Mixing SAN iSCSI Traffic with core network traffic, Am I asking for trouble?

I am configuring a new network and had a couple questions I am finding hard to find good answers about best practices on using VLANs to separate Core network traffic and iSCSI traffic. The switches ...
0
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4answers
333 views

Some clients cannot reach DHCP server

For the office we recently bought a WNDR3700 (v1) to accomodate our growing (from one wired and about four wireless to four wired and about eight wireless clients, so not really large) network. We ...
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2answers
1k views

How network devices affect TTL

When I do a ping, I can see the TTL value for each packet. For every router that I insert in between my computer and the router that connects to the internet, the TTL value goes down by one. However, ...
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1answer
291 views

iptables packetfilter on virtual bridge

I'd like to filter packets passing through a virtual bridge on a Fedora Linux machine. I've enabled the following sysctl options as described in multiple guides: net.bridge.bridge-nf-call-ip6tables = ...
1
vote
2answers
86 views

protocol based switching / routing?

I have run into a snag with a network design project I'm working on. Our internal network is 192.168.1.x. We have two gateways out of our network, #1 is .20 and #2 is .52. Normally you could pick and ...
3
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4answers
230 views

Switch with 48 port all PoE [closed]

We are looking for a 48 port PoE switch. My budget is around $1200. Is there any switch that is reliable for that price range?
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0answers
235 views

Auto switching between wired and wireless connections

How about this situation. Our business deals a lot with medical information. And some of our clients have demands based off HIPPA, etc. There is one now where they do not want an employee to have both ...
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1answer
96 views

Switching Example Problem

I'm studying for an exam and I'm going over review problems my professor has given me. I'm having trouble understanding Switching. Can someone explain to me how to do the following switching problem? ...
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0answers
779 views

Max STP instances reached on Cisco 2950 despite not actively using 64

I have a Cisco 5505 switch running CatOS connected to a number of Cisco 2950 switches running IOS. The 5505 switch supports a large number of vlans (I'm guessing 1005), yet the 2950s only support a ...
2
votes
1answer
447 views

Connecting office to data center via Metro-ethernet

I am installing a metro ethernet link from my office to my data center. The office will have a cisco 3750 with several vlans. The data center end will have a more complicated set up. The metro e from ...
2
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2answers
736 views

Layer 2 segmentation and network diameter

I am studying for my CCNA. The book makes a statement that I do not completely understand: "Layer 2 segmentation at the distribution layer practically eliminates network diameter as an issue." I'm ...
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3answers
4k views

Tool to trace mac address back to a switch port

To make a long story short, I have some newer off-brand switches in just a few locations. The main feature I'm missing on these switches vs our nicer (but old) 3Com equipment is the ability to trace ...
50
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2answers
34k views

How do VLANs work?

What are VLANs? What problems do they solve? I'm helping a friend learn basic networking, as he's just become the sole sysadmin at a small company. I've been pointing him at various questions/answers ...
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3answers
520 views

Moving MODx Files to Other MODx Website

I have one website with modx installed to www.website.com/modx/ --- Keep in mind there are other Websites In Progress on this storage server. My issue is that I'm moving all this: templates, template ...
0
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2answers
724 views

Autonegotiate errors between HP and Cisco hardware?

This is a bit of a specific extension to this question. I've got two ASA's that feed into a Procurve switch, and then into an IPS. All is well except that the procurve absolutely refuses to ...
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3answers
73 views

Windows Desktop Randomly Switches Resolution

Once per log in a specific account, Windows XP is switching to 800x600 and 8 (looks like) bit color. It then after a few seconds switches back to the regular settings. This, so far, has only ...
3
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3answers
7k views

Network wiring template for Visio

Anyone come across a good template/symbol pack for Visio for doing network wiring, patching, switch topologies, etc.? Everything in Visio for networking is 3D, and isn't really conducive to cabling.
5
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5answers
4k views

Hubs/switches taking out switches?

Here's the issue...we have a network with a lot of Cisco switches. Someone plugged in a hub on the network, and then we started seeing "weird" behavior; errors in communication between clients and ...
2
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1answer
270 views

Simplicity vs Redundancy

Assume you are tasked with running a set of mission critical web services with a targeted up time of 99.5% To achieve this, you have two identical clusters of hardware in two entirely separate data ...
5
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4answers
307 views

Are there any statistics on the number of networks using Ethernet Jumbo frames?

I am often told by Sales Engineers and Product managers that a Layer 2 Ethernet service is not fit for purpose if the maximum supported frame size is in the 1518-1522 range (enough to support standard ...
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2answers
1k views

Basic Cisco Switch Recommendation For HSRP WAN Redundancy [closed]

I am going to have to use HSRP for WAN failover with my two routers since a routing protocol is not being offered. In order to make sure my active router doesn't get out of sync with their active ...
0
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1answer
1k views

Difference between Bridging, Switching, Forwarding a frame? [closed]

What is the Difference between Bridging, Switching, Forwarding a frame? What is the difference between Control Plane Vs Forwarding Plane and Slow path Vs Fast Path? How are the above terms related to ...
4
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1answer
2k views

ESX(i) Interface Bonding ala Linux?

I'm planning to virtualize some Linux hosts that I've got, and I'm going to be putting ESXi on the physical machines. Currently, I've got two switches set up for redundancy, and I've got bonding setup ...