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New Member

Hardware Redundancy between sites

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!!!!

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Hardware Redundancy between sites

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

6 REPLIES

Re: Hardware Redundancy between sites

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

New Member

Re: Hardware Redundancy between sites

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!!!

Re: Hardware Redundancy between sites

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

New Member

Re: Hardware Redundancy between sites

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!!!

New Member

Re: Hardware Redundancy between sites

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

Re: Hardware Redundancy between sites

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

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