Re: OSPF Peers

Gaston,

Always follow this methodology:

Layer 1 - R U Cable correctly
Layer 2 - Do you have proper VLANs, Framing, switchport/router port
configuration and encapsulation
Layer 3 - do you have proper IP ranges, and Subnet Masking, can you ping
Layer 4 - Do not put authentication or other services onto of the below
layers, until you can successfully get Routing Protocols to work, Ping /
reachability, as you are only compounding any issues which you have not
identified in the lower layers.

R1:

Interface fa0/1
No shut
Ip add 10.10.10.1 255.255.255.0
_______________

SW1:

Vlan 20
R1-to-SW2
Exit

Int fa0/1
Switchport mode access
Switchport access vlan 20
No shut
Exit

-or-

Switchport trunk encaps dot1q
Switchport mode trunk
No shut

Int fa0/2
Switchport mode access
Switchport access vlan 20
No shut
Exit

-or-

Switchport trunk encaps dot1q
Switchport mode trunk
No shut

___________________________

SW2
!
Ip routing
!
Vlan 20
R1-to-SW2
Exit
!
Int vlan 20
No shut
Ip add 10.10.10.2 255.255.255.0
Exit
!
Int fa0/2
Switchport mode access
Switchport access vlan 20
No shut
Exit

-or-

Switchport trunk encaps dot1q
Switchport mode trunk
No shut

_______

Once you have Reachability, then configure the OSPF routing process, add
your network statements, ensure routing peers, then add the IP Ospf
authentication protocol.

HTH.

On 5/1/13 10:05 AM, "gaston brait" <gbrait_at_hotmail.com> wrote:

>Hi,
>Can anyone help me with this?
>R1 fa0/1 ============= fa0/1 SW1 fa0/2 ============= fa0/2 SW2
>R1 fa0/1 ip address 10.10.10.1 255.255.255.0 ip ospf
>authentication message-digest ip ospf message-digest-key 1
>md5
>cisco duplex auto speed auto
>SW1 fa0/1 switchport trunk encapsulation dot1q
>switchport
>mode trunk
>SW1 fa0/2 switchport trunk encapsulation dot1q
>switchport
>mode trunk
>SW2 fa0/2 switchport trunk encapsulation dot1q switchport
>mode trunk
>
>SW2 int vlan 20 ip address 10.10.10.20 255.255.255.0
>ip ospf authentication message-digest
>ip ospf message-digest-key 1 md5 cisco
>
>SW1 and SW2 are on ospf Area 0
>R1 is in area 20
>I'm trying to establish a peer for area 20 between SW2 int vlan 20 and R1
>fa
>0/1But its not coming up.R1 is not able to ping SW2What am I missing
>Thanks
>Gaston
>
>
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Received on Wed May 01 2013 - 19:22:32 ART