Adding a Class C

[spearehad]

Hello,

Anyone that can help, It would be much appreciated.

Lets say I have a cisco 2610 and a 2611.

They are both HOT with badnwith and one has 2 Class C's and the other has 10 Class C's

I have recieved auth to use 2 more Class C's for one router and 3 more for another, some are /23's and some are /24's.

How do I add them to the router? What are the commands?

Thanks, for yuour assistance.

Todd

 

[vipergg]

If you want to use them on a interface you just define them on whatever interface you want them on . If you are running a dynamic routing protocol on the box you will need to add a network statement for each of the new networks . You would have to give more info like what interface and if there is any routing protocols running .

 

[KiscoKid]

Hi Todd

We've spoken before. It's my belief you will need to get BGP established on both routers. To do this you'll need to get a peering arrangement in place with your upstream ISP(s) if you haven't done so already. You have 2 routers so either a dual router/single ISP or dual router/dual ISP approach would work for you. In addition to this (esp if you intend to use the dual ISP approach), you will have to request a BGP AS from your ISP. As they should be a reigstered LIR they can make this application to their Internet Registry on your behalf. They will charge you however for this. Arguably if you're only using a single ISP, you could use something they call a private AS (if your ISP will support this setup - not everyone does) but this eliminates the need to apply to your LIR (the ISP) for an unique AS.


Configuring BGP is not too tricky however it is important to understand the policy you want in place, i.e. inbound/outbound routing, session passwords, communities etc. Usually your ISP should be able to either perform or assist with the necessary BGP configuration.

So assuming you have an AS and a peering arrangement with your ISP(s), the most minimal configuration you need will be something as follows:

router bgp 26574
no synchronisation
network 202.32.48.0 mask 255.255.255.0
neighbor 184.83.84.1 remote-as 6574
no auto-summary

where 26574 is your allocated AS (this is a public unique one however they may allocate you one from 65000+ which is a private one), 202.32.48.0 is one of your Class C's (add network statements for each Class C), 184.83.84.1 is the IP address of your ISP peer router and 6574 is the AS of the ISP you are peering with.