Help with weird design.

[Brunhuber Adrian]

Hi,this is my first post.I`m working in networking and i`m a  CCNA&CCNP&JNCIA.

Today at one of my clients i found a strange design.

He has a mix vendor network core.

He cannot add or remove any equipement.

In the first raw there is a Juniper J series and a Cisco 2900 performing router on a stick for 10 vlans.

I decided the redundancy will be provided by VRRP.

On the middle raw are the shapers,one used as primary and the other intended for backup.

In the top raw is a J-series who is performing BGP with three ISP (full table) and a Cisco 2900 who is conected to another backup ISP.

Please advice me how you will provide this design with redundancy,what protocols are you thinking of using to transport traffic and provide redundancy.

Thanks

[Mohamed Sobair]

Hello,

With the current design, you can have the following approach:

1- On the TOP raw , you need to have IBGP between your Juniper and Cisco routers which already running ebgp with external service providers.

2- On the Middle raw, you have shapers, they mostly deployed inline to monitor all outbound/inbound traffic. you can just leave them as it is.

3- On the first raw, you can have VRRP for all your ROuter on Stick vlans, you can have two vrrp groups for those vlans with some  pointing to a Cisco router as thier defaul gateway, and others pointing to Juniper as thier Gateway and fall back to each of them (fault tolerance and redundancy) incase of any failure of each.

You can also add Two Static default routes with IP Sla , one as primary and the Second as backup pointing to TOP raw Active router and Redundant/backup router. this would also achieve redundancy and fault tolerance. you can also have loadbalancing on the WAN link if you want to do so.

Regards,

Mohamed

[Brunhuber Adrian]

Thanks for your answer.