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Cisco Community Designated VIP Class of 2020

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Beginner

Internet Routing - Suggestions

Hi,

Here is my existing layout:

CompanyNetwork -- MetroE -- (Fa)Router(Fa) -- switch -- InternalLan

Both Fastethernet intefaces in the router are taken, one is being used for the MetroE, the other one is for the internal vlan.

We are planning to install a separate internet T1 so we can take this person off the network (this is a private property). It will be a manage router from AT&T. This ISP router connects to a Fastethernet interface but both are taken. The switch is connected to the router using trunking and has two vlans, voice and data. No other configuration.

I have two scenarios:

1. Buy a High Speed Fa card (very expensive) for the router to connect the ISP router in there.

2. Connect the ISP router into the switch.

Which will you choose?

Thank you.

3 REPLIES 3
Advisor

Re: Internet Routing - Suggestions

You could also buy (depending on your router) a HWIC Ethernet module. Much cheaper than an FE interface on a router or layer 3 image on a switch.

http://www.cisco.com/en/US/prod/collateral/routers/ps5853/product_data_sheet0900aecd8016bf0b_ps5949_Products_Data_Sheet.html

Hope that helps

VIP Expert

Re: Internet Routing - Suggestions

If cost if the major criteria, and if you're already trunking vlans between the router and the switch, and assuming there's a spare port on the switch, connect the new ISP router to the switch and configure a new VLAN on that port that's also trunked, on the existing trunk, to the router. Of course, bringing traffic onto the switch via a VLAN, some consider a security issue. Also, as with the other Ethernet subinterfaces on the router, you might be unable to implement some IOS feature that you could with a dedicated port.

Rising star

Re: Internet Routing - Suggestions

Hi,

I would go for HWIC-4ESW.

Or else if you have a spare serial interface you can go for serial to ethernet converters.

-> Sushil

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