Tweet
Chào mọi người,
Mình có mô hình lab như hình vẽ. Mình chạy bằng Dynamips, cấu hình như sau:
en
conf t
host P1-AS1
!
int lo0
ip add 10.10.10.200 255.255.255.255
!
int s1/0
ip add 10.10.10.2 255.255.255.252
no shut
mpls ip
!
int s1/1
ip add 10.10.10.6 255.255.255.252
no shut
mpls ip
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
*************************************************
en
conf t
host PE1-AS1
!
ip vrf CustA
rd 1:100
route-target export 1:100
route-target import 1:100
!
int lo0
description RID for MP-BGP
ip add 10.10.10.101 255.255.255.255
!
int s1/0
description connected to P1-As1
ip add 10.10.10.1 255.255.255.252
no shut
mpls ip
!
int s1/1
description connected to CE1-A
ip vrf forwarding CustA
ip add 172.16.1.1 255.255.255.252
no shut
!
router eigrp 1
no auto-summary
!
address-family ipv4 vrf CustA
redistribute bgp 1 metric 1000 100 255 1 1500
network 172.16.0.0
no auto-summary
autonomous-system 101
exit-address-family
!
router ospf 1
router-id 10.10.10.101
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 10.10.10.102 remote-as 1
neighbor 10.10.10.102 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 10.10.10.102 activate
neighbor 10.10.10.102 send-community both
exit-address-family
!
address-family ipv4 vrf CustA
redistribute eigrp 101
no auto-summary
no synchronization
exit-address-family
!
*************************************************
en
conf t
host PE2-AS1
!
ip vrf CustA
rd 1:100
route-target export 1:100
route-target import 1:100
!
int lo0
description RID for MP-BGP
ip add 10.10.10.102 255.255.255.255
!
int s1/0
description connected to P1-AS1
ip add 10.10.10.5 255.255.255.252
no shut
mpls ip
!
int s1/1
description connected to PE2-A
ip vrf forwarding CustA
ip add 172.16.2.1 255.255.255.252
no shut
!
router eigrp 1
auto-summary
!
address-family ipv4 vrf CustA
redistribute bgp 1 metric 1000 100 255 1 1500
network 172.16.0.0
no auto-summary
autonomous-system 101
exit-address-family
!
router ospf 1
router-id 10.10.10.102
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 10.10.10.101 remote-as 1
neighbor 10.10.10.101 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 10.10.10.101 activate
neighbor 10.10.10.101 send-community both
exit-address-family
!
address-family ipv4 vrf CustA
redistribute eigrp 101
no auto-summary
no synchronization
exit-address-family
!
*************************************************
en
conf t
host CE1-A
!
int fa0/0
ip add 172.16.10.1 255.255.255.0
no shut
no keepalive
!
int s1/0
description connected to PE1-AS1
ip add 172.16.1.2 255.255.255.252
no shut
!
router eigrp 101
network 172.16.0.0
no auto-summary
*************************************************
en
conf t
host CE2-A
!
int lo0
ip add 172.16.99.1 255.255.255.0
!
int fa0/0
ip add 172.16.20.1 255.255.255.0
no shut
no keepalive
!
int s1/0
description connected to PE2-AS1
ip add 172.16.2.2 255.255.255.252
no shut
!
router eigrp 101
redistribute ospf 101
passive-interface Loopback0
network 172.16.0.0
no auto-summary
!
router ospf 101
log-adjacency-changes
redistribute eigrp 101 subnets
network 172.16.99.0 0.0.0.255 area 0
Sau khi đã cấu hình xong, show ip route trên các CE cho kết quả:
CE1-A#sho ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
D 172.16.20.0/24 [90/2684416] via 172.16.1.1, 00:10:11, Serial1/0
C 172.16.10.0/24 is directly connected, FastEthernet0/0
C 172.16.1.0/30 is directly connected, Serial1/0
D 172.16.2.0/30 [90/2681856] via 172.16.1.1, 00:10:11, Serial1/0
D 172.16.99.0/24 [90/2809856] via 172.16.1.1, 00:10:11, Serial1/0
CE2-A#sho ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
C 172.16.20.0/24 is directly connected, FastEthernet0/0
D 172.16.10.0/24 [90/2684416] via 172.16.2.1, 00:10:14, Serial1/0
D 172.16.1.0/30 [90/2681856] via 172.16.2.1, 00:10:14, Serial1/0
C 172.16.2.0/30 is directly connected, Serial1/0
C 172.16.99.0/24 is directly connected, Loopback0
Tuy nhiên CE1-A không ping được CE2-A
CE1-A#ping 172.16.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Mình thử traceroute thì thấy packet bị kẹt trên PE1-As1
CE1-A#traceroute 172.16.2.2
Type escape sequence to abort.
Tracing the route to 172.16.2.2
1 172.16.1.1 64 msec 100 msec 104 msec
2 * * *
3 * * *
Cả hai PE1 & PE2 đều ping được tới các CE của nó:
PE1-AS1#ping vrf CustA 172.16.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/74/128 ms
PE2-AS1#ping vrf CustA 172.16.20.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/55/108 ms
Tuy nhiên các lệnh show trên PE1-As1 và PE2-AS1 cho thấy cả 2 PE đều đã học đuợc route của nhau.
PE1-AS1#ping 10.10.10.102[/B]
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.102, timeout is 2 seconds:
!!!!!
----------------------------------------------------------------------------
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/88/128 ms
PE1-AS1#sho ip rout vrf CustA
Routing Table: CustA
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
B 172.16.20.0/24 [200/2172416] via 10.10.10.102, 00:14:54
D 172.16.10.0/24 [90/2172416] via 172.16.1.2, 00:15:45, Serial1/1
C 172.16.1.0/30 is directly connected, Serial1/1
B 172.16.2.0/30 [200/0] via 10.10.10.102, 00:14:54
B 172.16.99.0/24 [200/2297856] via 10.10.10.102, 00:14:54
PE2-AS1#sho ip rout vrf CustA
Routing Table: CustA
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
D 172.16.20.0/24 [90/2172416] via 172.16.2.2, 00:15:52, Serial1/1
B 172.16.10.0/24 [200/2172416] via 10.10.10.101, 00:14:59
B 172.16.1.0/30 [200/0] via 10.10.10.101, 00:14:59
C 172.16.2.0/30 is directly connected, Serial1/1
D 172.16.99.0/24 [90/2297856] via 172.16.2.2, 00:15:52, Serial1/1
----------------------------------------------------------------------------
PE1-AS1#sho ip bgp vpnv4 vrf CustA
BGP table version is 11, local router ID is 192.168.101.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf CustA)
*> 172.16.1.0/30 0.0.0.0 0 32768 ?
*>i172.16.2.0/30 10.10.10.102 0 100 0 ?
*> 172.16.10.0/24 172.16.1.2 2172416 32768 ?
*>i172.16.20.0/24 10.10.10.102 2172416 100 0 ?
*>i172.16.99.0/24 10.10.10.102 2297856 100 0 ?
PE2-AS1#sho ip bgp vpnv4 vrf CustA
BGP table version is 11, local router ID is 192.168.102.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf CustA)
*>i172.16.1.0/30 10.10.10.101 0 100 0 ?
*> 172.16.2.0/30 0.0.0.0 0 32768 ?
*>i172.16.10.0/24 10.10.10.101 2172416 100 0 ?
*> 172.16.20.0/24 172.16.2.2 2172416 32768 ?
*> 172.16.99.0/24 172.16.2.2 2297856 32768 ?
Nhờ các bạn troubleshoot giúp. Thanks
Mình có mô hình lab như hình vẽ. Mình chạy bằng Dynamips, cấu hình như sau:
en
conf t
host P1-AS1
!
int lo0
ip add 10.10.10.200 255.255.255.255
!
int s1/0
ip add 10.10.10.2 255.255.255.252
no shut
mpls ip
!
int s1/1
ip add 10.10.10.6 255.255.255.252
no shut
mpls ip
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
*************************************************
en
conf t
host PE1-AS1
!
ip vrf CustA
rd 1:100
route-target export 1:100
route-target import 1:100
!
int lo0
description RID for MP-BGP
ip add 10.10.10.101 255.255.255.255
!
int s1/0
description connected to P1-As1
ip add 10.10.10.1 255.255.255.252
no shut
mpls ip
!
int s1/1
description connected to CE1-A
ip vrf forwarding CustA
ip add 172.16.1.1 255.255.255.252
no shut
!
router eigrp 1
no auto-summary
!
address-family ipv4 vrf CustA
redistribute bgp 1 metric 1000 100 255 1 1500
network 172.16.0.0
no auto-summary
autonomous-system 101
exit-address-family
!
router ospf 1
router-id 10.10.10.101
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 10.10.10.102 remote-as 1
neighbor 10.10.10.102 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 10.10.10.102 activate
neighbor 10.10.10.102 send-community both
exit-address-family
!
address-family ipv4 vrf CustA
redistribute eigrp 101
no auto-summary
no synchronization
exit-address-family
!
*************************************************
en
conf t
host PE2-AS1
!
ip vrf CustA
rd 1:100
route-target export 1:100
route-target import 1:100
!
int lo0
description RID for MP-BGP
ip add 10.10.10.102 255.255.255.255
!
int s1/0
description connected to P1-AS1
ip add 10.10.10.5 255.255.255.252
no shut
mpls ip
!
int s1/1
description connected to PE2-A
ip vrf forwarding CustA
ip add 172.16.2.1 255.255.255.252
no shut
!
router eigrp 1
auto-summary
!
address-family ipv4 vrf CustA
redistribute bgp 1 metric 1000 100 255 1 1500
network 172.16.0.0
no auto-summary
autonomous-system 101
exit-address-family
!
router ospf 1
router-id 10.10.10.102
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 10.10.10.101 remote-as 1
neighbor 10.10.10.101 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 10.10.10.101 activate
neighbor 10.10.10.101 send-community both
exit-address-family
!
address-family ipv4 vrf CustA
redistribute eigrp 101
no auto-summary
no synchronization
exit-address-family
!
*************************************************
en
conf t
host CE1-A
!
int fa0/0
ip add 172.16.10.1 255.255.255.0
no shut
no keepalive
!
int s1/0
description connected to PE1-AS1
ip add 172.16.1.2 255.255.255.252
no shut
!
router eigrp 101
network 172.16.0.0
no auto-summary
*************************************************
en
conf t
host CE2-A
!
int lo0
ip add 172.16.99.1 255.255.255.0
!
int fa0/0
ip add 172.16.20.1 255.255.255.0
no shut
no keepalive
!
int s1/0
description connected to PE2-AS1
ip add 172.16.2.2 255.255.255.252
no shut
!
router eigrp 101
redistribute ospf 101
passive-interface Loopback0
network 172.16.0.0
no auto-summary
!
router ospf 101
log-adjacency-changes
redistribute eigrp 101 subnets
network 172.16.99.0 0.0.0.255 area 0
Sau khi đã cấu hình xong, show ip route trên các CE cho kết quả:
CE1-A#sho ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
D 172.16.20.0/24 [90/2684416] via 172.16.1.1, 00:10:11, Serial1/0
C 172.16.10.0/24 is directly connected, FastEthernet0/0
C 172.16.1.0/30 is directly connected, Serial1/0
D 172.16.2.0/30 [90/2681856] via 172.16.1.1, 00:10:11, Serial1/0
D 172.16.99.0/24 [90/2809856] via 172.16.1.1, 00:10:11, Serial1/0
CE2-A#sho ip rou
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
C 172.16.20.0/24 is directly connected, FastEthernet0/0
D 172.16.10.0/24 [90/2684416] via 172.16.2.1, 00:10:14, Serial1/0
D 172.16.1.0/30 [90/2681856] via 172.16.2.1, 00:10:14, Serial1/0
C 172.16.2.0/30 is directly connected, Serial1/0
C 172.16.99.0/24 is directly connected, Loopback0
Tuy nhiên CE1-A không ping được CE2-A
CE1-A#ping 172.16.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Mình thử traceroute thì thấy packet bị kẹt trên PE1-As1
CE1-A#traceroute 172.16.2.2
Type escape sequence to abort.
Tracing the route to 172.16.2.2
1 172.16.1.1 64 msec 100 msec 104 msec
2 * * *
3 * * *
Cả hai PE1 & PE2 đều ping được tới các CE của nó:
PE1-AS1#ping vrf CustA 172.16.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/74/128 ms
PE2-AS1#ping vrf CustA 172.16.20.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/55/108 ms
Tuy nhiên các lệnh show trên PE1-As1 và PE2-AS1 cho thấy cả 2 PE đều đã học đuợc route của nhau.
PE1-AS1#ping 10.10.10.102[/B]
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.102, timeout is 2 seconds:
!!!!!
----------------------------------------------------------------------------
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/88/128 ms
PE1-AS1#sho ip rout vrf CustA
Routing Table: CustA
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
B 172.16.20.0/24 [200/2172416] via 10.10.10.102, 00:14:54
D 172.16.10.0/24 [90/2172416] via 172.16.1.2, 00:15:45, Serial1/1
C 172.16.1.0/30 is directly connected, Serial1/1
B 172.16.2.0/30 [200/0] via 10.10.10.102, 00:14:54
B 172.16.99.0/24 [200/2297856] via 10.10.10.102, 00:14:54
PE2-AS1#sho ip rout vrf CustA
Routing Table: CustA
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
D 172.16.20.0/24 [90/2172416] via 172.16.2.2, 00:15:52, Serial1/1
B 172.16.10.0/24 [200/2172416] via 10.10.10.101, 00:14:59
B 172.16.1.0/30 [200/0] via 10.10.10.101, 00:14:59
C 172.16.2.0/30 is directly connected, Serial1/1
D 172.16.99.0/24 [90/2297856] via 172.16.2.2, 00:15:52, Serial1/1
----------------------------------------------------------------------------
PE1-AS1#sho ip bgp vpnv4 vrf CustA
BGP table version is 11, local router ID is 192.168.101.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf CustA)
*> 172.16.1.0/30 0.0.0.0 0 32768 ?
*>i172.16.2.0/30 10.10.10.102 0 100 0 ?
*> 172.16.10.0/24 172.16.1.2 2172416 32768 ?
*>i172.16.20.0/24 10.10.10.102 2172416 100 0 ?
*>i172.16.99.0/24 10.10.10.102 2297856 100 0 ?
PE2-AS1#sho ip bgp vpnv4 vrf CustA
BGP table version is 11, local router ID is 192.168.102.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf CustA)
*>i172.16.1.0/30 10.10.10.101 0 100 0 ?
*> 172.16.2.0/30 0.0.0.0 0 32768 ?
*>i172.16.10.0/24 10.10.10.101 2172416 100 0 ?
*> 172.16.20.0/24 172.16.2.2 2172416 32768 ?
*> 172.16.99.0/24 172.16.2.2 2297856 32768 ?
Nhờ các bạn troubleshoot giúp. Thanks
Attached Files
Comment