07-29-2008 02:08 PM - edited 03-03-2019 10:56 PM
I am trying to get a 7507 and a 3550 to talk via ospf. The first router is 10.91.0.1 and the switch on vlan 1 is 10.91.0.100. The 3550 will learn all the routes and install them but the 7500 will see any routes from the 3550. The sessions are up:
7505:
router ospf XXXXX
router-id 10.91.0.1
log-adjacency-changes
area 1 authentication
redistribute static subnets
network 10.91.0.0 0.0.255.255 area 1
network 64.XXX.XXX.0 0.0.0.255 area 0
network 64.XXX.XXX.0 0.0.3.255 area 1
default-information originate
interface FastEthernet5/1/0 config
ip ospf authentication message-digest
ip ospf authentication-key 7 XXXXXXX
ip ospf cost 1
Neighbor ID Pri State Dead Time Address Interface
10.91.0.100 1 FULL/BDR 00:00:33 10.91.0.100 FastEthernet5/
1/0
and the databases are there on the 7505 7505#sho ip ospf data
OSPF Router with ID (10.91.0.1) (Process ID XXXXX)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
10.91.0.1 10.91.0.1 1294 0x80000001 0x0075D0 1
but no ospf routes get installed
the routing tables on the 7507
the 3550:
3550#sho ip ospf
Routing Process "ospf XXXXX" with ID 10.91.0.100
Start time: 5w1d, Time elapsed: 8w4d
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Supports area transit capability
It is an autonomous system boundary router
Redistributing External Routes from,
static, includes subnets in redistribution
Router is not originating router-LSAs with maximum metric
Sum 0x176A114
Number of opaque AS LSA 0. Checksum Sum 0x000000
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Number of areas transit capable is 0
External flood list length 0
IETF NSF helper support enabled
Cisco NSF helper support enabled
No auto cost
Area 1
Number of interfaces in this area is 2
Area has simple password authentication
SPF algorithm last executed 00:26:59.336 ago
SPF algorithm executed 2 times
Area ranges are
Number of LSA 6. Checksum Sum 0x06E6C0
Number of opaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
3550# sho ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.91.12.4 1 FULL/DR 00:00:33 10.91.12.4 FastEthernet0/
22
10.91.0.1 1 FULL/DR 00:00:36 10.91.0.1 Vlan1
router ospf XXXXX
router-id 10.91.0.100
log-adjacency-changes
no auto-cost
area 1 authentication
redistribute static subnets
network 10.91.0.0 0.0.255.255 area 1
network 64.XXX.XXX.0 0.0.3.255 area 1
interface Vlan1
ip address 10.91.0.100 255.255.255.0
ip ospf authentication message-digest
ip ospf authentication-key 7 XXXXXXX
ip ospf cost 1
07-29-2008 05:33 PM
Add default-information originate to 3550rtr
also check the ip ospf cost at both routers. They are running in a broadcast multi-access correct and if the case this mode requires the election of a DR in the network set by the ip ospf cost.
07-30-2008 04:27 PM
Ok, i tried inserting default-information originate on the 3550 and changed the cost on the 7507 to be 1 and the 3550 to be 10 and it still will not insert the routes.
if i do a clear ip route * , it will load the routes for a second, then they will disappear after 10 seconds.
7505#sho ip route ospf
64.0.0.0/8 is variably subnetted, 187 subnets, 11 masks
O E2 64.XXX.XXX.0/28 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O 64.XXX.XXX.0/27 [110/111] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O E2 64.XXX.X.0/24 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O E2 64.XXX.XXX.48/28 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
10.0.0.0/8 is variably subnetted, 13 subnets, 2 masks
O 10.91.12.0/24 [110/101] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
my configs for the ospf are now:
7505:
router ospf XXXXX
router-id 10.91.0.1
log-adjacency-changes
no auto-cost
area 1 authentication
redistribute static subnets
network 10.91.0.0 0.0.255.255 area 1
network 64.XXX.XXX.0 0.0.0.255 area 0
network 64.XXX.XXX.0 0.0.3.255 area 1
default-information originate
3550:
router ospf XXXXX
router-id 10.91.0.100
log-adjacency-changes
no auto-cost
area 1 authentication
redistribute static subnets
network 10.91.0.0 0.0.255.255 area 1
network 64.XXX.XXX.0 0.0.3.255 area 1
7505#sho ip ospf
Routing Process "ospf XXXXX" with ID 10.91.0.1
Start time: 00:02:18.064, Time elapsed: 7w6d
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Supports area transit capability
It is an area border and autonomous system boundary router
Redistributing External Routes from,
static
Router is not originating router-LSAs with maximum metric
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Incremental-SPF disabled
Minimum LSA interval 5 secs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 15. Checksum Sum 0x248708
Number of opaque AS LSA 0. Checksum Sum 0x000000
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Number of areas transit capable is 0
External flood list length 0
Area BACKBONE(0) (Inactive)
Number of interfaces in this area is 15
Area has simple password authentication
SPF algorithm last executed 00:02:17.772 ago
SPF algorithm executed 5 times
Area ranges are
Number of LSA 9. Checksum Sum 0x057969
Number of opaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
Area 1
Number of interfaces in this area is 1
Area has simple password authentication
SPF algorithm last executed 00:02:27.856 ago
SPF algorithm executed 5 times
Area ranges are
Number of LSA 6. Checksum Sum 0x226CA7
Number of opaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
07-31-2008 07:06 AM
I need show ip ospf database database-summary output on both
But remember 7505 has the addr so why should it put it its table check the addr properly
07-31-2008 10:03 AM
There are a couple of things in this thread that I find puzzling. The thread was started by dan obrien of wells gardner, but is continued by Charles Sattler of
LasVegas.Net. Is this really the same issue on the same equipment?
Also this post shows a number of routes that are learned from the 3550:
7505#sho ip route ospf
64.0.0.0/8 is variably subnetted, 187 subnets, 11 masks
O E2 64.XXX.XXX.0/28 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O 64.XXX.XXX.0/27 [110/111] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O E2 64.XXX.X.0/24 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
O E2 64.XXX.XXX.48/28 [110/20] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
10.0.0.0/8 is variably subnetted, 13 subnets, 2 masks
O 10.91.12.0/24 [110/101] via 10.91.0.100, 00:00:01, FastEthernet5/1/0
Is this an example of the routes which appear immediately after clear ip route or is it something else?
And if it is an example of the routes which appear immediately after clear ip route, do they really disappear from the routing table, or are they replaced by other routes?
If we could clarify these things we might be closer to a solution.
HTH
Rick
07-31-2008 03:38 PM
Sorry, i didn't realize i was already logged in as someone else when i posted this, but it is the same person.
The problem was i had a static route for 10.91.12.0 which the ancillary routes that go there would not propagate across. Once that was deleted all the routes showed up
thanks
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: