hi everyone,
i have to establish iBGP connection between the CSR towards the edge routers like (126,101,107,136,14,40)
i have more than one service provider towards the edges and the BGP connections is normally established.
the CSR reach to all Edge routers normally.
i already make the CSR Route-reflector to Readvertise the routes.
all router learned the routes normally but when i try to ping from one site (edge) to another, the host unreachable
example :
126#sh ip bgp
Network Next Hop Metric LocPrf Weight Path
*>i 20.20.14.0/24 10.120.98.17 0 100 0 i
*>i 20.20.40.0/24 10.120.98.17 0 100 0 i
*>i 20.20.101.0/24 10.120.98.17 0 100 0 i
*>i 20.20.107.0/24 10.120.98.17 0 100 0 i
*> 20.20.126.0/24 0.0.0.0 0 32768 i
*>i 20.20.136.0/24 10.120.98.17 0 100 0 i
*>i 172.19.255.254/32 10.120.98.17 0 100 0 i
126#ping 20.20.14.254 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.20.14.254, timeout is 2 seconds:
Packet sent with a source address of 20.20.126.254
.....
Success rate is 0 percent (0/5)
_______________
but the WIMAX Service provider is work fine because the connection between CSR and the edge(14,40) is L2
14#sh ip bgp
Network Next Hop Metric LocPrf Weight Path
*> 20.20.14.0/24 0.0.0.0 0 32768 i
*>i 20.20.40.0/24 192.168.29.100 0 100 0 i
*>i 20.20.101.0/24 192.168.29.100 0 100 0 i
*>i 20.20.107.0/24 192.168.29.100 0 100 0 i
*>i 20.20.126.0/24 192.168.29.100 0 100 0 i
*>i 20.20.136.0/24 192.168.29.100 0 100 0 i
*>i 172.19.255.254/32 192.168.29.100 0 100 0 i
14#ping 20.20.40.254 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.20.40.254, timeout is 2 seconds:
Packet sent with a source address of 20.20.14.254
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 2/3/5 ms
_______________
the problem is the L3 provider (IZFN and VSAT)
_______________
the configuration:
CSR
interface Loopback0
ip address 172.19.255.254 255.255.255.255
!
interface GigabitEthernet1
no ip address
negotiation auto
no mop enabled
no mop sysid
!
interface GigabitEthernet1.29
encapsulation dot1Q 29
ip address 192.168.29.100 255.255.255.0
!
interface GigabitEthernet1.30
encapsulation dot1Q 30
ip address 192.168.30.100 255.255.255.0
!
interface GigabitEthernet1.98
encapsulation dot1Q 98
ip address 10.120.98.17 255.255.255.0
!
interface GigabitEthernet1.172
encapsulation dot1Q 172
ip address 172.22.8.6 255.255.255.0
router bgp 65001
bgp log-neighbor-changes
bgp listen range 192.168.0.0/16 peer-group WIMAX
bgp listen range 172.22.0.0/16 peer-group VSAT
bgp listen range 10.120.0.0/16 peer-group IZFN
network 172.19.255.254 mask 255.255.255.255
neighbor IZFN peer-group
neighbor IZFN remote-as 65001
neighbor IZFN route-reflector-client
neighbor IZFN next-hop-self all
neighbor WIMAX peer-group
neighbor WIMAX remote-as 65001
neighbor WIMAX route-reflector-client
neighbor WIMAX next-hop-self all
neighbor VSAT peer-group
neighbor VSAT remote-as 65001
neighbor VSAT route-reflector-client
neighbor VSAT next-hop-self all
ip route 10.120.0.0 255.255.0.0 10.120.98.1
ip route 172.22.0.0 255.255.0.0 172.22.8.1
ip route 192.168.29.0 255.255.255.0 192.168.29.254
ip route 192.168.30.0 255.255.255.0 192.168.30.254
ASR-1000#sh ip bgp
Network Next Hop Metric LocPrf Weight Path
*>i 20.20.14.0/24 192.168.29.200 0 100 0 i
*>i 20.20.40.0/24 192.168.30.200 0 100 0 i
*>i 20.20.101.0/24 10.120.101.200 0 100 0 i
*>i 20.20.107.0/24 10.120.107.200 0 100 0 i
*>i 20.20.126.0/24 10.120.126.200 0 100 0 i
*>i 20.20.136.0/24 172.22.9.200 0 100 0 i
*> 172.19.255.254/32 0.0.0.0 0 32768 i
126
interface Loopback0
ip address 20.20.126.254 255.255.255.0
!
interface Ethernet0/0
ip address 10.120.126.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.126.0 mask 255.255.255.0
neighbor 10.120.98.17 remote-as 65001
ip route 10.120.98.0 255.255.255.0 10.120.126.1
101
interface Loopback0
ip address 20.20.101.254 255.255.255.0
!
interface Ethernet0/0
ip address 10.120.101.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.101.0 mask 255.255.255.0
neighbor 10.120.98.17 remote-as 65001
ip route 10.120.98.0 255.255.255.0 10.120.101.1
107
interface Loopback0
ip address 20.20.107.254 255.255.255.0
!
interface Ethernet0/0
ip address 10.120.107.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.107.0 mask 255.255.255.0
neighbor 10.120.98.17 remote-as 65001
ip route 10.120.98.0 255.255.255.0 10.120.107.1
136
interface Loopback0
ip address 20.20.136.254 255.255.255.0
!
interface Ethernet0/0
ip address 172.22.9.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.136.0 mask 255.255.255.0
neighbor 172.22.8.6 remote-as 65001
ip route 172.22.0.0 255.255.0.0 172.22.9.1
14
interface Loopback0
ip address 20.20.14.254 255.255.255.0
!
interface Ethernet0/0
ip address 192.168.29.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.14.0 mask 255.255.255.0
neighbor 192.168.29.100 remote-as 65001
ip route 192.168.0.0 255.255.0.0 192.168.29.254
40
interface Loopback0
ip address 20.20.40.254 255.255.255.0
!
interface Ethernet0/0
ip address 192.168.30.200 255.255.255.0
!
router bgp 65001
bgp log-neighbor-changes
network 20.20.40.0 mask 255.255.255.0
neighbor 192.168.30.100 remote-as 65001
ip route 192.168.0.0 255.255.0.0 192.168.30.254
____________
all edges have these route in routing table
sh ip route bgp
Gateway of last resort is not set
20.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
B 20.20.14.0/24 [200/0] via 192.168.30.100, 00:21:53
B 20.20.101.0/24 [200/0] via 192.168.30.100, 00:21:53
B 20.20.107.0/24 [200/0] via 192.168.30.100, 00:21:53
B 20.20.126.0/24 [200/0] via 192.168.30.100, 00:21:53
B 20.20.136.0/24 [200/0] via 192.168.30.100, 00:21:52
172.19.0.0/32 is subnetted, 1 subnets
B 172.19.255.254 [200/0] via 192.168.30.100, 00:21:53
