Hi - i have an issue, which i'm trying to get around without using static routes.
I have stacked 3750E's to my floors, which will be the L3 distribution layer. (I've had Cisco in here, and this is the design they pushed. Looks good, they're powerfull redundant switches).
The Floor Stacks are running 'ipbase' which support the EIGRP Stub.
I want it so the floors recieve a default route only, and have configured it as such. (eg, eigrp stub, network 10.0.0.0).
I have statics configured on my 6509 cores, and they have ICMP access to everything.
In the diagram - the PC on the left cannot ping the PC on the right. If i configure statics on the stacks it comes straight up, but statics don't help me should i lose one of the cores.
Is my only solution, to get rid of my /30's and create a big HSRP domain?
Any suggestion helpfull. Thanks, - JH.
You do not have a default-route on your 3750 pointing back to the 6500's and you also have all the P2P /30 subnets on your 3750'S which isn't right either.
All you want on the 3750 is the P2P /30's for that 3750 and the local vlans + a summary route for the rest of the network.
What you need to do is advertise a summary route from the 6500's switches to the 3750 swithes. You can do this in one of two ways
1) Have a default route on your 6500 and redistribute it up to the 3750's. Use a distribute list under the eigrp config on your 6500's to only allow the default-route to the 3750 switches.
If you already have a default route in your network this would work fine but if you don't and it looks like you don't from your 6500 routing table
2) On each of the interfaces on the 6500's that connect to the 3750's you need to add
ip summary-address eigrp 1 10.0.0.0 255.0.0.0
This will advertise a summary route to the 3750's.
NOTE - only thing i'm not sure as i have forgotten is if you use the "ip summary-address eigrp...." command does it suppress the more specific routes or do you still have to filter them out.
If no one else can confirm you could either test and check or i'll check in lab tomorrow.
** Please do this out of hours ie. not in production hours **
Does all of this make sense ?