Procurve - Configuring BGP all 0's route selection

AS-65008	SPH	AS-65009
hostname "AS-65008"	hostname "SPH"	hostname "AS-65009"
ip route 0.0.0.0 0.0.0.0 blackhole	ip route 90.1.1.0 255.255.255.0 blackhole	ip route 0.0.0.0 0.0.0.0 blackhole
ip route 5.1.1.0 255.255.255.0 blackhole	ip routing	ip route 40.1.1.0 255.255.255.0 blackhole
ip route 10.1.1.0 255.255.255.0 blackhole		ip route 50.1.1.0 255.255.255.0 blackhole
ip routing	ip prefix-list "FROM_AS-65008" seq 5 permit 0.0.0.0 255.255.255.255	ip routing
	ip prefix-list "FROM_AS-65008" seq 10 permit 5.1.1.0 255.255.255.0
interface loopback 0	ip prefix-list "TO_AS-65008" seq 10 permit 90.1.1.0 255.255.255.0	interface loopback 0
ip address 1.1.1.1		ip address 3.3.3.3
exit		exit
	ip prefix-list "FROM_AS-65009" seq 5 permit 0.0.0.0 255.255.255.255
router bgp 65008	ip prefix-list "FROM_AS-65009" seq 10 permit 50.1.1.0 255.255.255.0	router bgp 65009
enable	ip prefix-list "TO_AS-65009" seq 10 permit 90.1.1.0 255.255.255.0	enable
bgp router-id 20.1.1.2		bgp router-id 30.1.1.2
bgp log-neighbor-changes	interface loopback 0	bgp log-neighbor-changes
network 0.0.0.0 0.0.0.0	ip address 2.2.2.2	network 0.0.0.0 0.0.0.0
network 5.1.1.0 255.255.255.0	exit	network 40.1.1.0 255.255.255.0
network 10.1.1.0 255.255.255.0		network 50.1.1.0 255.255.255.0
neighbor 20.1.1.1 remote-as 65009	router bgp 65009	neighbor 30.1.1.1 remote-as 65009
exit	enable	exit
	bgp router-id 30.1.1.1
vlan 200	bgp log-neighbor-changes	vlan 300
name "VLAN200"	bgp maximum-prefix 20	name "VLAN300"
untagged 2	network 20.1.1.0 255.255.255.0	untagged 1
ip address 20.1.1.2 255.255.255.0	network 30.1.1.0 255.255.255.0	ip address 30.1.1.2 255.255.255.0
exit	network 90.1.1.0 255.255.255.0	exit
	neighbor 20.1.1.2 remote-as 65008
	neighbor 20.1.1.2 route-map "FROM_AS-65008" in
	neighbor 20.1.1.2 route-map "TO_AS-65008" out
	neighbor 30.1.1.2 remote-as 65009
	neighbor 30.1.1.2 route-map "FROM_AS-65009" in
	neighbor 30.1.1.2 route-map "TO_AS-65009" out
	exit
	exit
	vlan 200
	name "VLAN200"
	untagged 2
	ip address 20.1.1.1 255.255.255.0
	exit
	vlan 300
	name "VLAN300"
	untagged 1
	ip address 30.1.1.1 255.255.255.0
	exit
	route-map "FROM_AS-65008" permit seq 10
	set local-preference 50
	match ip address prefix-list "FROM_AS-65008"
	exit
	route-map "TO_AS-65008" permit seq 10
	match ip address prefix-list "TO_AS-65008"
	exit
	route-map "FROM_AS-65009" permit seq 10
	set local-preference 100
	match ip address prefix-list "FROM_AS-65009"
	exit
	route-map "TO_AS-65009" permit seq 10
	match ip address prefix-list "TO_AS-65009"
	exit

SPH# show ip bgp route community

  Local AS            : 65009         Local Router-id  : 30.1.1.1
  BGP Table Version   : 2

  Status codes: * - valid, > - best, i - internal, e - external, s - stale
  Origin codes: i - IGP, e - EGP, ? - incomplete

     Network            Nexthop         Community
     ------------------ --------------- --------------------------------------
* e  0.0.0.0/0          20.1.1.2                                              ?
*>i  0.0.0.0/0          30.1.1.2                                              ?
*>e  5.1.1.0/24         20.1.1.2                                              ?
* e  10.1.1.0/24        20.1.1.2                                              ?
*>   20.1.1.0/24                                                              i
*>   30.1.1.0/24                                                              i
* i  40.1.1.0/24        30.1.1.2                                              ?
*>i  50.1.1.0/24        30.1.1.2                                              ?
*>   90.1.1.0/24                                                              ?

SPH# show ip route

                                        IP Route Entries

  Destination        Gateway         VLAN Type      Sub-Type   Metric     Dist.
  ------------------ --------------- ---- --------- ---------- ---------- -----
  0.0.0.0/0          20.1.1.2        200  bgp                  0          20
  2.2.2.2/32         lo0                  connected            1          0
  5.1.1.0/24         20.1.1.2        200  bgp                  0          20
  20.1.1.0/24        VLAN200         200  connected            1          0
  30.1.1.0/24        VLAN300         300  connected            1          0
  50.1.1.0/24        30.1.1.2        300  bgp                  0          200
  90.1.1.0/24        blackhole            static               1          1
  127.0.0.0/8        reject               static               0          0
  127.0.0.1/32       lo0                  connected            1          0


NOTE: The local prefernce shows in the bgp route table to prefer the route set with a local-pref of 100 (higher pref wins) but yet the ip route table shows the lower pref route.  The  LOCAL_PREF is a well know discretionary setting but only shared by  iBGP peers.  So even though the bgp table likes the route to the remote AS (65008) it is the ibgp route that makes it into the routing table (i'm not sure why this is) but is easily fixed by prepending or some other discretionary bgp setting

Using loop-back interfaces

A BGP Interface Cannot Communicate with a Neighbor. Unlike other routing protocols, BGP interfaces do not automatically search for and exchange routes with connected routers. You must manually configure authorized neighbors.

View the BGP neighbor and double-check its IP address:

ProCurve# show ip bgp neighbors

Ping the neighbor to check connectivity.
If the ping is successful, but the router does not seem to be exchanging BGP messages, you might need to configure eBGP multihop. External neighbors are supposed to be directly connected to the BGP interface. If they are not, you must specify the number of hops it is to the neighbor. For example:

ProCurve(config-bgp-neighbor)# ebgp-multihop 4

Remember that a loopback interface adds a hop to the route. Even if the external neighbor is directly connected, you must enable eBGP multihop if you are using the loopback interface as the source BGP interface.