From: George Goglidze (goglidze@gmail.com)
Date: Sat Sep 29 2007 - 15:44:38 ART
Hello all,
I'm doing ipexpert-s lab number 5. and they have discontinuous ospf area 0.
the topology is the following:
R2 FR hub.
R6, R4 FR spokes.
R2 F0/0 interface is in area 0, and FR interface that connects to R4 and R6
is in area 246.
R6 has area 0 too on other interface, let's say int Multilink 1.
when I have interface Multilink 1 in shutdown.
I do receive routes to other areas that are accessible through R2.
but when it's UP, the routes disappear.
------
here's some config:
------------------------------
R2:
router ospf 1
router-id 2.2.2.2
log-adjacency-changes
area 0 authentication message-digest
area 25 virtual-link 5.5.5.5
network 2.2.2.0 0.0.0.255 area 0
network 20.2.2.0 0.0.0.255 area 246
network 21.2.2.0 0.0.0.255 area 25
network 150.50.12.0 0.0.0.255 area 0
network 150.50.25.0 0.0.0.255 area 25
network 150.50.246.0 0.0.0.255 area 246
interface Serial2/0.1 multipoint
ip address 150.50.246.2 255.255.255.0
no ip split-horizon
ip ospf network broadcast
ip ospf priority 10
frame-relay map ip 150.50.246.2 204
frame-relay map ip 150.50.246.4 204 broadcast
frame-relay map ip 150.50.246.6 206 broadcast
------------
R6 config
----------------------
router ospf 1
router-id 6.6.6.6
log-adjacency-changes
area 0 authentication message-digest
network 6.6.6.0 0.0.0.255 area 246
network 61.6.6.0 0.0.0.255 area 0
network 150.50.69.0 0.0.0.255 area 0
network 150.50.246.0 0.0.0.255 area 246
interface Serial2/0
ip address 150.50.246.6 255.255.255.0
encapsulation frame-relay
ip ospf network broadcast
ip ospf priority 0
serial restart-delay 0
no dce-terminal-timing-enable
no arp frame-relay
frame-relay map ip 150.50.246.2 602 broadcast
frame-relay map ip 150.50.246.4 602 broadcast
frame-relay map ip 150.50.246.6 602
no frame-relay inverse-arp
interface Multilink1
ip address 150.50.69.6 255.255.255.0
ip ospf message-digest-key 1 md5 7 0502160A395C4B1B0D
shutdown
ppp multilink
ppp multilink group 1
As I know I should be ok with discontinuous area 0. but why does it not
work???
here's the routing table when Multilink 1 is in shutdown.
R6#sh 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
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/66] via 150.50.246.2, 00:01:00, Serial2/0
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/65] via 150.50.246.2, 00:01:00, Serial2/0
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/65] via 150.50.246.4, 00:20:59, Serial2/0
21.0.0.0/32 is subnetted, 1 subnets
O IA 21.2.2.2 [110/65] via 150.50.246.2, 00:01:00, Serial2/0
20.0.0.0/32 is subnetted, 1 subnets
O 20.2.2.2 [110/65] via 150.50.246.2, 00:20:59, Serial2/0
5.0.0.0/32 is subnetted, 1 subnets
O IA 5.5.5.5 [110/129] via 150.50.246.2, 00:01:00, Serial2/0
6.0.0.0/24 is subnetted, 1 subnets
C 6.6.6.0 is directly connected, Loopback0
172.4.0.0/24 is subnetted, 4 subnets
O 172.4.0.0 [110/65] via 150.50.246.4, 00:21:00, Serial2/0
O 172.4.1.0 [110/65] via 150.50.246.4, 00:21:00, Serial2/0
O 172.4.2.0 [110/65] via 150.50.246.4, 00:21:00, Serial2/0
O 172.4.3.0 [110/65] via 150.50.246.4, 00:21:00, Serial2/0
10.0.0.0/32 is subnetted, 1 subnets
O IA 10.1.1.1 [110/66] via 150.50.246.2, 00:01:01, Serial2/0
61.0.0.0/24 is subnetted, 1 subnets
C 61.6.6.0 is directly connected, Loopback1
150.50.0.0/16 is variably subnetted, 5 subnets, 2 masks
C 150.50.246.0/24 is directly connected, Serial2/0
C 150.50.7.0/25 is directly connected, FastEthernet0/0
O IA 150.50.1.0/24 [110/66] via 150.50.246.2, 00:01:01, Serial2/0
O IA 150.50.12.0/24 [110/65] via 150.50.246.2, 00:01:01, Serial2/0
O IA 150.50.25.0/24 [110/128] via 150.50.246.2, 00:01:01, Serial2/0
and here's the sh ip route when it's up:
R6#sh 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
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/65] via 150.50.246.4, 00:21:25, Serial2/0
20.0.0.0/32 is subnetted, 1 subnets
O 20.2.2.2 [110/65] via 150.50.246.2, 00:21:25, Serial2/0
6.0.0.0/24 is subnetted, 1 subnets
C 6.6.6.0 is directly connected, Loopback0
172.4.0.0/24 is subnetted, 4 subnets
O 172.4.0.0 [110/65] via 150.50.246.4, 00:21:25, Serial2/0
O 172.4.1.0 [110/65] via 150.50.246.4, 00:21:25, Serial2/0
O 172.4.2.0 [110/65] via 150.50.246.4, 00:21:25, Serial2/0
O 172.4.3.0 [110/65] via 150.50.246.4, 00:21:25, Serial2/0
61.0.0.0/24 is subnetted, 1 subnets
C 61.6.6.0 is directly connected, Loopback1
150.50.0.0/16 is variably subnetted, 4 subnets, 3 masks
C 150.50.246.0/24 is directly connected, Serial2/0
C 150.50.7.0/25 is directly connected, FastEthernet0/0
C 150.50.69.0/24 is directly connected, Multilink1
C 150.50.69.9/32 is directly connected, Multilink1
all the IA routes dissapeared.
Many thanks for any help,
This archive was generated by hypermail 2.1.4 : Sat Oct 06 2007 - 12:01:16 ART