Hi all, I have been working on a project to redesign our work network and am a little low on experience of speccing suitable capacity routers/switches and hope you may be able to help me.
I am planning to use a layer 3 switch (possibly the Catalyst 3560) to aggregate our different WAN connections, which are all ethernet. The main link is 100Mb and their are approximately 6 other 10Mb links to other areas currently. The banbwidth we work to at the moment is an average of about 25Mbps although this is likely to shoot up to closer to 50Mbps by the end of the year and probably up to 100Mbps within a couple of years.
The links are either from 'trusted' (as much as they can be) networks or are firewalled elsewhere. I am looking to also use the switch to centrally manage ACLs for each of these links, nothing too fancy; simply whether certain hosts can talk to others and in a few places filtering by protocol/port.
My first question would be whether (and I expect is is fine) the Catalyst 3560G-24TS will be able to route between these different subnets and whether it can also cope with the ACLs i am likely to impliment as detailed above?
I do not expect to need the advanced routing protocols, so the basic routing image is likely to suffice i expect. However I don't know if i need a different IOS image to enable the use of extended ACLs?
The switch's uplink will then feed over a 1Gb link to a router which will route traffic to our other three main subnets. One for CCTV, one for our servers and another for our workstations.
We are planning to extend the amount of CCTV and other bandwidth intensive equipment in the next year or so, and i become a little lost when looking at which router is most likely to serve our needs.
I have been looking at the ISR 3845, but cannot find out anywhere a rough idea of how much traffic it is able to route before becoming overcome. I am hoping to use a total of 4 gigabit interfaces which should give us the capacity need for the future.
Other than routing I am again hoping to add some further ACLs here to help filter traffic and also use it to run a DHCP server for one of the subnets.
Once again my question would be whether the 3845 would be able to handle this capacity? It's literature talks about being able to use advanced services at T3/E3 rates, but i do not know whether it could cope with simply routing and ACLs for 2-3Gbps of traffic.
The alternative router to use, should the 3845 not be able to handle this would be the 7200 series. Again, i do not expect to need the flexibility to add many different flavours of interfaces but rather only use ethernet.
This series also have many different options of which processing engine to use, which once again i am not sure which is most likely to be needed given the bandwidth of data. The 7201 offers the smallest package (although not the cheapest) and seems to come with 4 gigabit ports (2x SFP or RJ45 and 2x SFP) and one spare slot for the possibility of another interface in the future.
My question is whether all can be used at the same time?
I don't know what can be plugged where. Will all 4 interfaces need a SFP adapter or will two work natively with RJ45? For the other two, one can be used to interface with the potential 3560 with a SFP port (does this mean fibre or can it take copper?), and the other will need to interface with a linksys switch SRW2048 which has four linksys miniGBIC ports which can be either fibre or copper.
I hope all this makes some sense, and that you maybe able to offer some information which would clear up my remaining problems.