From: Christian C. Aguillo (chris_aguillo@xxxxxxxxxxx)
Date: Wed Jan 09 2002 - 06:30:03 GMT-3
Hi there,
I think you missed some configuration on the Interface of Routers 2 and 3
specifically the MTU.
Routers 1 and 2 will not form adjacencies due to MTU mismatch. If you try to
change the MTu in router 3, you will not form adjancecies with R2 also.
Solution 1:
match all your interface [R1/R2/R3] into 500 bytes if that is what u like.
Solution 2:
use IP OSPF MTU-IGNORE in the router 3.
Please inform me what you get coz I dont have the priviledge to simulate in
a lab.
Thanks also in advance for your reply.
chris
----- Original Message -----
From: "fathallah said" <sfathallah@mail.cbi.net.ma>
To: <ccielab@groupstudy.com>
Sent: Monday, January 07, 2002 11:58 PM
Subject: ospf over nbma
> Hello group
> I have a ospf working over frame relay Hub and Spook connection betwen
tres
> router R1, R2,and R3
> R3 is the spook router.
>
> R1, R2 use subinterfaces p2p witch run ospf p2mp network.
> R3 use physical interface witch also run Ospf p2mp.
>
> R1/R3 and R2/R3 can make adjancies.
>
> according to the ospf over frame relay specifications, this config should
work
> because all the interfaces have the same ospf network type and the same
hello
> and dead intervall.
>
> this my configs.
>
> please tell me if i missed something.
>
> R1#sh run
> Building configuration...
>
> Current configuration:
> !
> version 12.0
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname R1
> !
> aaa new-model
> aaa authentication login default local none
> enable secret 5 $1$ufjE$I18MPzZSekka7UyAF2f/.0
> !
> username cisco password 0 cisco
> username said password 0 said
> ip subnet-zero
> no ip domain-lookup
> !
> !
> !
> !
> !
> interface Loopback0
> ip address 152.1.1.77 255.255.255.252
> no ip directed-broadcast
> !
> interface Loopback1
> ip address 152.1.1.97 255.255.255.224
> no ip directed-broadcast
> !
> interface Ethernet0/0
> ip address 152.1.1.1 255.255.255.192
> no ip redirects
> no ip directed-broadcast
> ip ospf interface-retry 0
> ip ospf priority 0
> standby 1 priority 200
> standby 1 preempt
> standby 1 ip 152.1.1.3
> standby 2 ip 152.1.1.4
> !
> interface Serial0/0
> mtu 500
> no ip address
> no ip directed-broadcast
> encapsulation frame-relay
> no ip mroute-cache
> no frame-relay inverse-arp
> frame-relay lmi-type cisco
> !
> interface Serial0/0.1 point-to-point
> ip address 152.1.1.81 255.255.255.248
> no ip directed-broadcast
> ip ospf network point-to-multipoint
> ip ospf interface-retry 0
> frame-relay interface-dlci 100
> !
> interface Serial0/1
> no ip address
> no ip directed-broadcast
> shutdown
> !
> router ospf 1
> router-id 152.1.1.72
> network 152.1.1.1 0.0.0.0 area 3
> network 152.1.1.81 0.0.0.0 area 3
> !
> ip classless
> !
> alias exec frp sh frame pvc
> alias exec frm sh frame map
> alias exec i sh ip route
> alias exec ior sh ip ospf route
> alias exec ion sh ip ospf nei
> alias exec ioi sh ip ospf database
> alias exec ct conf t
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> !
> no scheduler allocate
> end
>
> R3#sh run
> Building configuration...
>
> Current configuration : 1376 bytes
> !
> version 12.1
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname R3
> !
> aaa new-model
> aaa authentication login default local none
> enable secret 5 $1$R8p1$2K6Y4hHL.zUIW0Km.sYYF0
> !
> username cisco password 0 cisco
> username said password 0 said
> !
> !
> !
> !
> memory-size iomem 25
> ip subnet-zero
> no ip finger
> no ip domain-lookup
> !
> !
> !
> !
> !
> !
> voice-port 2/0
> !
> voice-port 2/1
> !
> !
> !
> interface Loopback0
> ip address 152.1.1.69 255.255.255.255
> !
> interface Serial0
> ip address 152.1.1.83 255.255.255.248
> encapsulation frame-relay
> ip ospf network point-to-multipoint
> frame-relay map ip 152.1.1.81 300
> frame-relay map ip 152.1.1.82 301
> frame-relay map ip 152.1.1.83 301
> no frame-relay inverse-arp
> frame-relay lmi-type cisco
> !
> interface Serial0.1 multipoint
> !
> interface Serial1
> no ip address
> shutdown
> !
> interface FastEthernet0
> ip address 152.1.1.129 255.255.255.128
> speed auto
> !
> router ospf 1
> router-id 152.1.1.69
> log-adjacency-changes
> network 152.1.1.83 0.0.0.0 area 3
> !
> ip classless
> no ip http server
> !
> alias exec frp sh frame pvc
> alias exec frm sh frame map
> alias exec i sh ip route
> alias exec ior sh ip ospf route
> alias exec ion sh ip ospf nei
> alias exec ioi sh ip ospf database
> alias exec ct conf t
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> !
> no scheduler allocate
> end
>
> R3#
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