no best path(BGP)

[admin_2]

what is wrong?

ping test is good:both path

======================

C6509--R#sh ip bgp 10.10.6.19

BGP routing table entry for 10.10.0.0/16, version 0

Paths: (2 available, no best path)

Not advertised to any peer

1000 2000, (received-only)

200.100.200.150 from 200.100.200.150 (200.100.200.150)

Origin IGP, localpref 100, valid, external

Community: 312354000

3000 2000, (received-only)

150.100.100.109 from 150.100.100.109 (172.30.51.171)

Origin IGP, localpref 100, valid, external

Community: 248119000

=========================

router bgp 5000

no synchronization

bgp log-neighbor-changes

network 220.1.54.0

redistribute static

neighbor 150.100.100.109 remote-as 3000

neighbor 150.100.100.109 ebgp-multihop 255

neighbor 150.100.100.109 soft-reconfiguration inbound

neighbor 150.100.100.109 route-map ASPREPEND out

neighbor 150.100.100.109 filter-list 10 in

neighbor 150.100.100.109 filter-list 100 out

neighbor 200.100.200.150 remote-as 1000

neighbor 200.100.200.150 ebgp-multihop 255

neighbor 200.100.200.150 soft-reconfiguration inbound

neighbor 200.100.200.150 filter-list 20 in

neighbor 200.100.200.150 filter-list 100 out

no auto-summary

!

ip classless

ip route 0.0.0.0 0.0.0.0 10.10.10.1

ip route 0.0.0.0 0.0.0.0 20.20.20.1

ip route 220.1.54.0 255.255.254.0 100.246.1.1

ip route 150.100.100.109 255.255.255.255 20.20.20.1

ip route 200.100.200.150 255.255.255.255 10.10.10.1

route-map ASPREPEND permit 10

set as-path prepend 5000 5000

ip as-path access-list 10 permit ^(3000_)+$

ip as-path access-list 20 permit ^(1000_)+$

ip as-path access-list 100 permit ^$

[Harold Ritter]

Both paths are in "received-only" mode, which means that they have been filtered by an inbound policy but kept because "soft-reconfiguration inbound" is configured.

The as-path ACLs 10 and 20 are not allowing the as-paths received from your two neighbors.

as-path acl 10 only allows one or more repetition of ASN 3000, which is different than "3000 2000" received from 150.100.100.109.

as-path acl 20 only allows one or more repetition of ASN 1000, which is different than "1000 2000" received from 200.100.200.150.

Hope this helps,

[engineer_msu]

Dear Harold, I have solved my issue by seeing you comment. Thanks.

[Harold Ritter]

Hi,

I'm glad to hear I could help.

Thanks for the comment