From: nagendra kumar (nagendranainar@yahoo.co.in)
Date: Mon Mar 24 2008 - 06:24:35 ART
Hi All,
e0/0.16 e0/0.16
R1---------------R6
e0/0.10 e0/0.10
| |
|--------------------|
|
|
e0/0.10
R3
e0/0.16 ---> 151.90.16.0/24
e0/0.10 ---> 151.90.163.0/24
In the above topology, I am running OSPF btw R1 and R6 on e0/0.10 and e0/0.16 interfaces and EIGRP btw R6 and R3 on e0/0.10 interface.
Now when I redistribute EIGRP into OSPF, I will have only one route to ospf external routes due to forwarding Address. But the question asks me to ahve 2 next hop for all external routes which is possible by suppressing the forwarding address. I tried configuring the network command in R6 under ospf process as below,
"network 151.90.163.6 0.0.0.0 a 0"
As per the conditions to set FA to non-zero address,
1) OSPF is enabled on the ASBR's next hop interface AND
2) ASBR's next hop interface is non-passive under OSPF AND
3) ASBR's next hop interface is not point-to-point AND
4) ASBR's next hop interface is not point-to-multipoint AND
5) ASBR's next hop interface address falls under the network range specified in the router ospf command.
Any other conditions besides these set the forwarding address to 0.0.0.0.
In our config, the 5th condition will be violated and so the FA is expected to be 0.0.0.0 which is not happening in my case.
Can some please let me know if I am missing anythng here?.
Configs:
=====
R6#sh run | sec ospf
ip ospf network point-to-point
redistribute ospf 1 metric 10000 1 255 10 1500 route-map OSPF2EIGRP
router ospf 1
router-id 151.90.106.1
log-adjacency-changes
area 0 range 151.90.0.0 255.255.0.0
area 60 stub
area 60 filter-list prefix OSPF_DEFAULT in
redistribute eigrp 10 subnets route-map EIGRP2OSPF
network 151.90.16.0 0.0.0.255 area 0
network 151.90.60.0 0.0.0.255 area 60
network 151.90.106.0 0.0.0.255 area 0
network 151.90.163.6 0.0.0.0 area 0
distance ospf external 175
R6#
R6#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
151.90.101.1 1 FULL/DR 00:00:38 151.90.163.1 Ethernet0/0.10
151.90.101.1 1 FULL/DR 00:00:38 151.90.16.1 Ethernet0/0.16
151.90.109.1 1 FULL/DR 00:00:30 151.90.60.20 Ethernet0/0.60
R6#
R6#$database external 151.90.34.0 | beg Advertising Router: 151.90.106.1
Advertising Router: 151.90.106.1
LS Seq Number: 80000005
Checksum: 0x243C
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 151.90.163.3
External Route Tag: 50
R6#
I tried clearing OSPF process and still end up with same issue
Regards,
Nagendra
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This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:54 ART