COMMUNITIES/Tags and route-maps are killing me - Help please
I am getting my butt kicked by route-maps and communities. This is from CCIE-SP Lab 4. Would anybody who has an understanding of Communities/tags and route-maps please explain to me what is this config doing. The config is going on a router that has an EBGP peering with another, but really I just want to understand What exactly is this config accomplishing. Please help...I'm hurting on this one.
router bgp 1000 address-family ipv4 neighbor 10.0.35.3 route-map RFC_1998 in neighbor 10.0.0.2 send-community neighbor 10.0.35.3 send-community exit-address-family ! ip bgp-community new-format ! ip community-list standard 1000:80 permit 1000:80 ip community-list standard 1000:90 permit 1000:90 ip community-list standard 1000:110 permit 1000:110 ip community-list standard 1000:120 permit 1000:120 ! route-map RFC_1998 permit 10 match community 1000:80 set local-preference 80 route-map RFC_1998 permit 20 match community 1000:90 set local-preference 90 route-map RFC_1998 permit 30 match community 1000:110 set local-preference 110 route-map RFC_1998 permit 40 match community 1000:120 set local-preference 120 route-map RFC_1998 permit 1000