Question about Eigrp restribute static to two different clouds

[HWangLoyalty_2]

There are two different MPLS clouds at our Data Center. We set up two different Eigrp sessions on our core switch such as:

router eigrp 100====(CloudA)
redistribution static
.....
distribute 3 out static
.......

router eigrp 200====(CloudB)

redistribution static
.....
distribute 5 out static
.......

ip route 1.1.1.0 255.255.255.0 1.1.3.1
ip route 1.1.2.0 255.255.255.0 1.1.3.1
ip route 1.2.1.0 255.255.255.0 1.1.3.1

access-list 3 permit 1.1.1.0 0.0.0.255
access-list 3 permit 1.1.2.0 0.0.0.255
access-list 5 permit 1.2.1.0 0.0.0.255

Both 1.1.1.0 and 1.1.2.0 are redistributed to CloudA. Subnet 1.2.1.0 are redistributed to CloudB.

There is only CloudA at SiteA (3.3.3.0/24)and only CloudB at SiteB(4.4.4.0/24).How to connect them as there is not siteB subnet in the CloudA ? Could I add only

access-list in core swicth on Data Center,likt that:

access-list 5 permit 3.3.3.0 0.0.0.255

I am not sure if SiteA subnet could be redistributed to CloudB, Please advice!

Thx 

[milan.kulik]

Hi,

IMHO, you could configure static routes for the subnets 3.3.3.0/24 and 4.4.4.0/24 and add them to access-list 5 (access-list 3, respectively).

But a clean solution (and more flexible for possible other subnets added in the future) would be a 3.3.3.0/24 redistribution from eigrp  100 to eigrp 200 and 4.4.4.0/24 redistribution from eigrp 200 to eigrp 100.

So you could configure:

router eigrp 100====(CloudA)
redistribute eigrp 200 route-map from-200 metric ...

router eigrp 200====(CloudB)

redistribute eigrp 100 route-map from-100 metric ...

route-map from-200 permit 10

match ip address prefix-list siteB

route-map from-100 permit 10

match ip address prefix-list siteA

ip prefix-list siteB seq 5 permit 4.4.4.0/24

ip prefix-list siteA seq 5 permit 3.3.3.0/24

The command syntax might be slight different, but I hope the idea is clear.

HTH,

Milan