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VRRP for gateway redundancy

ncsteelerfann
Level 1
Level 1

I am looking at implementing a VRRP solution, but I have a question concerning the service provider side. If I have two routers and a virtual router IP address of say 192.168.1.1 on the inside, what is required on the service provider (public) side? Would I need two Internet connections (two public IPs?), or is it possible to still just have a single Internet connection? I guess I'm just unsure of what options would exist on the service provider side of the two routers. Could someone who is familiar with this type of configuration provide some insight?

2 Replies 2

johnd2310
Level 8
Level 8

Hi,

Are you running an routing protocol between your routers and service provider routers? Your vrrp configuration controls which router you clients use to get out. Are you trying to provide redundancy for your clients or are you trying  to provide redundancy for the connection to your provider? You can have a single internet connection and still configure vrrp on(e.g. you provider provisions an ethernet connection  terminating on a switch.your two routers would connect to the switch). Your provider will need to configure some method to control inbound traffic(e.g. they would configure vrrp on their end as well). If you need link redundancy then you would get another circuit and have vrrp over the two links. Usually when you have more than one router connecting to a provider you would run a routing protocol like bgp. 

 

Thanks

John

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Thanks for your response, John. I believe you have pretty much answered my question when you said that the service provider would configure VRRP on their end as well. That was the piece that I wasn't sure about. But just in case, let me provide a little more detail and answer your questions.

First off, it's a very small, but fairly critical network environment. The only router that we have in operation is the one router that is connected to the service provider network (this is the reason for my confusion on how VRRP will work). We have a few different VLANs and the one router is performing inter-VLAN routing, so there is no routing protocol in use on our side. We currently only have a single Internet connection (we are planning to add a redundant connection with a second service provider in the near future). However, I have a spare router that's just sitting in the rack. If the primary router goes down, I can just move the cables over to the backup router. However, instead of just having the backup router sitting there doing nothing, I want to configure VRRP to provide redundancy (without having to manually move the cables from one device to the other, like I currently would have to do). This way, if the primary router ever fails overnight, the network won't go down. Operations are 24/7, but IT staff (myself and one other person) works normal business hours. So, we are on call outside of normal business hours, but if the primary router goes down at 3am, the network is down until one of us comes in and moves the cables over to the backup router. I want to avoid this and have the switch-over to the backup router be automatic.

 

Thanks,

Bryan

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