Re: Vlan setup over multiple power connect 2724

Question

We have roughly 130 Pc's and servers all fighting for traffic on our gigabit lan would I benifit from LAG for the links between the swithes and what router requirements will I need to do inter vlan conectivity. Cisco makes the 2800 series with gigabit ports.

DRNO10 · Answer

If it is your interswitch uplinks that are causing the bottlenecks, then yes you would benifit from using Link aggregation or trunking feature . As for inter vlan routing Dell also makes a switch model called the 6024 which you will find at a price point much cheaper than most Cisco gear and can do full layer 3 routing.

gsherman03 · Answer

Is there a way to tell if the uplinks between the switches are the bottle neck. Would I benifit from using a fiber run doubled up between them. So your feeling is not to go the router route and to go with a switch with L3 Vlan Switching. So I would use that and have all the other switches connect off of it. I was always under the impresion that each Vlan is a seperate subnet and that inter connection with each vlan could be acomplished by a router. I have my CCNA so I understand the vlan and trunking concept but not sure how it applies to the web managed switches.

DRNO10 · Answer

Well i dont know the 2724 well enough. But most of the other powerconnect managed switches left you view the port utilization at any given time. But i dont know if the 2724 supports this. As far as implementing vlans. In my experience it is usually geared more towards security and broadcast domain control. However i am sure you could implement a QOS setup with vlans to give certain traffic more priority.   As far as fiber, copper should be fine its done properly. Unless you are talking about large distances. But as far as speed goes copper/fiber should be identical in theory.   As for the layer3 you kind of have it right. You can break up your network into different subnets with a different vlan associated with them. You can use the 6024 to route the traffic between the vlans and restrict traffic as well. Although i dont see this making a huge difference for your throughput on the network unless you have alot of broadcast traffic.

gsherman03 · Answer

Yeah well I feel we have allot of broad cast traffic we have 25 machines that connect to a SQL server that is in high demand large files that transfer over the lan constantly all day long. Would enabling Jumbo frames help. Is there a way to tell my broadcast traffic and determine if vlanning would help.

DRNO10 · Answer

I would give ethereal a try and sniff the traffic on your network. maybe mirror a port going to a server, and ethereal will break down the traffic for you. %25 seems to stick in head as alot of broadcast traffic for a network. There was a post about it somewhere on this forum, but i dont remember where.

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Re: Vlan setup over multiple power connect 2724

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