From: Malcolm Price (malcolm@xxxxxxxxxxx)
Date: Sat Aug 03 2002 - 18:13:44 GMT-3
Raj,
Don't know if this is any help but I got this from:
http://www.cisco.com/warp/public/104/9.html#QB
It reads:
Q: Why are loopbacks advertised as /32 host routes in OSPF?
A: Loopbacks are considered host routes in OSPF, and they're advertised as
/32. For more information, see section 9.1 of RFC 2328. In Cisco IOS .
version 11.3T and 12.0, if the ip ospf network point-to-point command is
configured under loopbacks, then OSPF advertises the loopback subnet as the
actual subnet configured on loopbacks
It may be something to do with point to multipoint...
All the best,
Malcolm
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Raj
Sent: Saturday, August 03, 2002 9:36 PM
To: ccielab@groupstudy.com
Subject: IP OSPF NETWORK TYPE PROBLEM
Hi Group,
I've racked my brains but I am still unable to work out why the
109.1.44.0/29 subnet which operates over the frame-relay cloud shows up as
/32 routes for the each spoke.
Both router 2 and router 3 also have "ip ospf network point-to-multipoint"
configured.
Is it something to do with the "point-to-multipoint" ?
interface Loopback0
ip address 109.1.1.1 255.255.255.0
ip ospf network point-to-point
!
interface Serial0
no ip address
encapsulation frame-relay
no frame-relay inverse-arp
frame-relay lmi-type ansi
!
interface Serial0.1 multipoint
ip address 109.1.44.1 255.255.255.248
ip ospf network point-to-multipoint
frame-relay map ip 109.1.44.2 102 broadcast
frame-relay map ip 109.1.44.3 103 broadcast
!
interface Serial0.2 point-to-point
ip address 109.1.39.1 255.255.255.252
frame-relay interface-dlci 106
!
interface Serial1
ip address 109.1.32.1 255.255.255.252
!
interface TokenRing0
ip address 109.1.35.1 255.255.255.192
ring-speed 16
!
router ospf 1
log-adjacency-changes
network 109.1.1.0 0.0.0.255 area 0
network 109.1.32.0 0.0.0.3 area 0
network 109.1.35.0 0.0.0.63 area 0
network 109.1.39.0 0.0.0.3 area 0
network 109.1.44.0 0.0.0.7 area 0
Gateway of last resort is not set
109.0.0.0/8 is variably subnetted, 15 subnets, 7 masks
C 109.1.44.0/29 is directly connected, Serial0.1
O 109.1.44.2/32 [110/64] via 109.1.44.2, 00:05:54, Serial0.1
O 109.1.44.3/32 [110/64] via 109.1.44.3, 00:05:54, Serial0.1
C 109.1.39.0/30 is directly connected, Serial0.2
C 109.1.32.0/30 is directly connected, Serial1
C 109.1.35.0/26 is directly connected, TokenRing0
O 109.1.56.0/21 [110/65] via 109.1.44.2, 00:05:54, Serial0.1
O 109.1.48.0/30 [110/1626] via 109.1.32.2, 00:05:55, Serial1
[110/1626] via 109.1.44.2, 00:05:55, Serial0.1
O 109.1.0.0/28 [110/74] via 109.1.44.3, 00:05:55, Serial0.1
O 109.6.6.0/24 [110/65] via 109.1.39.2, 00:05:55, Serial0.2
O 109.4.4.0/24 [110/65] via 109.1.32.2, 00:05:55, Serial1
O 109.3.3.0/24 [110/65] via 109.1.44.3, 00:05:55, Serial0.1
O 109.2.2.0/24 [110/65] via 109.1.44.2, 00:05:55, Serial0.1
C 109.1.1.0/24 is directly connected, Loopback0
O 109.1.3.0/24 [110/74] via 109.1.32.2, 00:05:55, Serial1
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