HSRP Design Question

I'm struggling with a network design as follows:

2 L3 switches running HSRP with 2 VLANs - 1 for users, 1 for servers I then have a VLAN that my FW is connected to for Net access.

Now, I have to add on two remote sites. These two sites have the main network (described above, call it Site HQ) as their default gateway. It is critical that they be able to reach the server VLAN and the FW VLAN. Now - I want to connect Sites 1 and 2 with redundancy and as much automated failover as possible. RIP is running (I plan to go to EIGRP later).

Looking at one remote site only: The most expensive and I think most redundant solution would be to buy four routers with two T1s and build a square type topology where the remote LAN would reside on an L3 switch which would be the default GW, with it having default routes to both of the routers depending on which was "primary".

I could also have two routers with Multilink PPP running to load balance between HQ and Site 1. My problem there is how do I connect it at HQ for HSRP to be effective? I have the "WAN" stuff running off of another VLAN on the 3750s - but HSRP is not enabled for that VLAN - should it be? If the HSRP master doesn't go down, but one of the T1s does, I don't really want the whole network to fail to the HSRP slave, I was thinking of just having a backup route pointing to the HSRP slave and then out to the remote site.

Any comments/suggestions/ideas?


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A few suggestions, based on the level of understanding implied by your questions:

Distinguish between techniques appropriate for WAN designs and those only appropriate for LANs (such as HSRP).

Remember that redundancy ONLY enhances availability if it is correctly designed, implemented AND managed. Otherwise, all you increase is cost.

Focus on improving the pieces which are most prone to failure first. Fix the pieces with the biggest impact rather than the ones which are easiest.

Consider hiring a competent consultant to hold your hand and guide you through the details unless you have lots of time and can afford the down time as you learn from trial and error.

You might want to pick up a copy of my book and read chapters 1,

2, and 6. Then think about how the concepts presented apply to your network requirements.

Good luck and have fun!

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Vincent C Jones

I tried but it seems to be out of print?

BTW - Are these your's too?

MAP/TOP United States Army in World War Two....

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Available "new & used" from other vendors on Amazon. The remainders seem to be running out, as the price is up to $30.00 plus shipping.

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Vincent C Jones

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