From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sat Sep 24 2005 - 21:07:57 GMT-3
Dave,
OSPF network types that use a DR (broadcast and non-broadcast) can neighbor with each other and function properly. Likewise OSPF network types that do not use a DR (point-to-point and point-to-multipoint) can neighbor with each other and function properly. But if you mix DR types with non-DR types they will not function properly as you have seen. You should see in the OSPF database "Adv Router is not-reachable" messages when you've mixed DR and non-DR types.
HTH,
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
________________________________________
From: Schulz, Dave [mailto:DSchulz@dpsciences.com]
Sent: Saturday, September 24, 2005 3:27 PM
To: Brian Dennis; ccielab@groupstudy.com
Subject: RE: OSPF redistribute connected issue
Interesting! I thought that if you adjusted the hello/dead timers to agree at both ends of the circuit....that the adjacency would come up and everyone would be happy. Also, I did a debug ip ospf events at both R2 and R5 and nothing appeared out of the ordinary. What is best way to debug this if you run into such an issue (I like to create these "networks that should never happen" labesque type scenarios)?
Dave
-----Original Message-----
From: Brian Dennis
To: Schulz, Dave; ccielab@groupstudy.com
Sent: 9/24/2005 3:32 PM
Subject: RE: OSPF redistribute connected issue
Dave,
You have an OSPF network type mismatch. OSPF network types that
do not use a DR (point-to-point and point-to-multipoint) can not
neighbor with OSPF network types that do use a DR (broadcast and
non-broadcast). They will become "adjacent" with each other if you
adjust the hello timers but they won't become true neighbors.
HTH,
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Schulz, Dave
Sent: Saturday, September 24, 2005 12:09 PM
To: ccielab@groupstudy.com
Subject: OSPF redistribute connected issue
Group -
Here is an issue that I am having under OSPF....
R2 is connected R5 through a pt-pt frame. R2 is the ABR, which has the
area 0
connection. The connection to R5 and R5 in in area 1. I have a number
of
loopbacks set up on R5 (50.50.x.0)....and, when I redistribute into
OSPF, I
can see them at R2 in the ospf database, but they are not showing up in
the
routing table. And, because of this, the loopbacks are not reachable at
the
spokes (other links out on the network connected to R2). Any thoughts
on this
one?
R2 config.....
interface Serial0
no ip address
encapsulation frame-relay
no frame-relay inverse-arp
frame-relay lmi-type cisco
!
interface Serial0.1 multipoint
ip address 192.168.3.2 255.255.255.0
ip ospf priority 255
frame-relay map ip 192.168.3.2 203
frame-relay map ip 192.168.3.3 203 broadcast
frame-relay map ip 192.168.3.4 204 broadcast
no frame-relay inverse-arp
!
interface Serial0.2 point-to-point
ip address 192.168.5.2 255.255.255.0
ip ospf hello-interval 30
frame-relay interface-dlci 205
!
router ospf 1
log-adjacency-changes
network 192.168.3.0 0.0.0.255 area 0
network 192.168.5.0 0.0.0.255 area 1
neighbor 192.168.3.4
neighbor 192.168.3.3
On R5 the config is.....
interface Loopback0
ip address 50.50.50.5 255.255.255.0
!
interface Loopback10
ip address 50.50.60.5 255.255.255.0
!
interface Loopback11
ip address 50.50.61.5 255.255.255.0
!
interface Loopback12
ip address 50.50.62.5 255.255.255.0
!
interface Loopback13
ip address 50.50.63.5 255.255.255.0
!
interface Loopback14
ip address 50.50.64.5 255.255.255.0
!
interface Loopback15
ip address 50.50.65.5 255.255.255.0
!
interface Loopback16
ip address 50.50.66.5 255.255.255.0
!
interface Loopback17
ip address 50.50.67.5 255.255.255.0
!
interface Loopback18
ip address 50.50.68.5 255.255.255.0
!
interface Serial0
ip address 192.168.5.5 255.255.255.0
encapsulation frame-relay
frame-relay map ip 192.168.5.2 502 broadcast
no frame-relay inverse-arp
frame-relay lmi-type cisco
!
router ospf 1
router-id 50.50.50.5
log-adjacency-changes
redistribute connected metric 20 metric-type 1 subnets
network 192.168.5.0 0.0.0.255 area 1
Dave
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