Solved: Hardware Redundancy between sites

tarik.cisco · ‎04-06-2010

Hello everybody!!!!

I'm desinging a network for 2 eletric substation following some specifications. (see topology.jpg)

I need to provide fully hardware redundancy between two eletric substation, provide encryption and VPN.

I'm planning to use Two cisco 1841 router with AIM VPN module and more 4 ethernet ports at each site.

This network is for security system (CFTV). Will have multicast traffic and some TCP traffic between sites, so I will use GRE Tunnel + IPsec to pass multicast packets.

For hardware redundancy I'm planning to use HSRP + IP sla command to verify the connection.

My client ask me to use NHRP, but i'm not sure how do I will implement NHRP in this solution ? It is not a point-to-point connection When I use GRE Tunnel + IPSec ?

Why I need to use NHRP in this case??

I appreciate if anyone could help me!!!

Thanks everybody!!!!

Collin Clark · ‎04-06-2010

I don't think it will help at all with mcast. Your inital design should work just fine as well.

View solution in original post

Collin Clark · ‎04-06-2010

What is the WAN cloud (ie MPLS, frame relay)? Generally speaking NHRP is used mostly in NBMA WAN.

tarik.cisco · ‎04-06-2010

The WAN cloud is Frame Relay links.

Do I need NHRP to redundancy works fine???

NHRP will help in this case ???

I was informed that will have mobile users acessing network from notebook remotely, NHRP will help them?

TKS a lot!!!

Collin Clark · ‎04-06-2010

Maybe, depends on your overall network design. Here's a great article on what it does and you should be able to determine if you want it or not.

http://www.netcraftsmen.net/resources/archived-articles/433.html

tarik.cisco · ‎04-06-2010

I understood that with HSRP one router will be as standby gateway for the other site, so always two routers (one of each side) will be in standby status correct??

I was informed that will have mobile users acessing network from notebook remotely, NHRP will help them???

I'm reading the article know , thanks again!!!

tarik.cisco · ‎04-06-2010

I can't see what NHRP could help in this case??? There are only 2 sites, both sites have statics IP, there are two routers at each site to do hardware redundancy. Will NHRP help in multicast traffic between sites???

TKS

Collin Clark · ‎04-06-2010

I don't think it will help at all with mcast. Your inital design should work just fine as well.