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The route map rules will be sorted by ID. The rule ID will determine which rule will be matched first.
As an example, configure the BGP neighbor with route-map rules:
config router bgp
set as 64514
set router-id 10.192.255.253
config neighbor
edit "100.14.1.73"
set remote-as 65014
set route-map-out "community_set"
end
Route-Map:
edit "community_set"
config rule
edit 3
set action deny
set match-ip-address "network192.168.1.0"
set set-community "65110:1"
next
edit 2
set set-community "65110:10"
next
edit 1
set action deny
set match-ip-address "network192.168.3.0"
set set-community "65110:3"
next
end
next
end
Prefix List:
edit "network192.168.1.0"
config rule
edit 1
set prefix 192.168.1.0 255.255.255.0
unset get
unset le
next
end
next
edit "network192.168.3.0"
config rule
edit 1
set prefix 192.168.3.0 255.255.255.0
unset get
unset le
next
end
next
edit "prefix_all"
config rule
edit 1
set prefix 0.0.0.0 0.0.0.0
unset get
unset le
next
end
next
end
Below are the routes that are getting advertised to neighbor 100.14.1.73. It denies 192.168.3.0/24 and allows other routes:
get router info bgp neighbors 100.14.1.73 advertised-routes
VRF 0 BGP table version is 233, local router ID is 10.192.255.253
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight RouteTag Path
*> 0.0.0.0/0 100.14.1.74 0 0 65222 64856 i <-/->
*> 192.168.1.0 100.14.1.74 100 32768 0 i <-/->
*> 192.168.248.0/25 100.14.1.74 0 0 65222 i <-/->
*> 192.168.249.1/32 100.14.1.74 0 0 65222 64856 ? <-/->
Total number of prefixes 4
get router info bgp neighbors 100.14.1.73 advertised-routes
VRF 0 BGP table version is 233, local router ID is 10.192.255.253
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight RouteTag Path
*> 0.0.0.0/0 100.14.1.74 0 0 65222 64856 i <-/->
*> 192.168.1.0 100.14.1.74 100 32768 0 i <-/->
*> 192.168.248.0/25 100.14.1.74 0 0 65222 i <-/->
*> 192.168.249.1/32 100.14.1.74 0 0 65222 64856 ? <-/->
Total number of prefixes 4
Note:
It allows all routes because of the route map rule 2.
Change the route map as follows:
config router route-map
edit "community_set"
config rule
edit 3
set match-ip-address "network192.168.1.0"
set set-community "65110:1"
next
edit 2
set action deny
set set-community "65110:10"
next
edit 1
set match-ip-address "network192.168.3.0"
set set-community "65110:3"
next
end
next
end
As it follows the rule ID, it will advertise 192.168.3.0/24 and deny everything else because rule 1 has a prefix list with network 192.168.3.0/24 and action is allowed.
get router info bgp neighbors 100.14.1.73 advertised-routes
VRF 0 BGP table version is 233, local router ID is 10.192.255.253
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight RouteTag Path
*> 192.168.3.0 100.14.1.74 0 0 65222 i <-/->
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