From: Darby Weaver (darbyweaver@yahoo.com)
Date: Wed Apr 18 2007 - 14:24:05 ART
Kewl...
Yes - Looks like I labbed it too fast...
Ya'll know Eric doesn't miss these things - he got me
already.
I half read Brian's comment and before I posted my
little lab.
I know about timers and it is a common scenario.
Ouch!
Sorry for the mixup.
--- Ronnie Angello <ronnie.angello@gmail.com> wrote:
> There was another restriction preventing us from
> using any interface level
> command on the spokes. In that case you cannot use
> the 'ip ospf network'
> command on the spokes. The solution is to use the
> default network type
> (non-broadcast) on the spokes, change the network
> type of the hub to
> broadcast (because you cannot use the neighbor
> command), and change the
> hello interval on the hub to match the spokes. This
> will allow the
> adjacencies to form. I think that Brian D. already
> explained the solution
> very well... Lab up the correct solution and let us
> know how it goes.
>
> Ronnie
>
>
> On 4/17/07, darbyweaver@yahoo.com
> <darbyweaver@yahoo.com> wrote:
> >
> > Well while I was working it out Brian Dennis (THE
> AUTHORITY) came to the
> > same conclusion I was creating a practical
> demonstration for as shown below:
> >
> >
> > At least I am feeling better about my poor
> techical ability to understand
> > this stuff and apply it properly...
> >
> > Ha! Ha!
> >
> > Killen me...
> >
> >
> > Seriously though - I was using my routers in this
> example and I was too
> > lazy to use my own R5... So I substituted R3 and
> IP Addresses which are
> > irrelevant for the case in question.
> >
> > So beware...
> > ===========================================Hmmm...
> >
> > Bear with me, I just used my R1, R2, and R3 with
> R3 being the hub in this
> > example (Note my R3 is the R5 as specified in this
> example).
> >
> > I made R3 a multipoint in the frame section. "R5
> should use a
> > subinterface per the diagram". The diagram had a
> subinterface of 0/0.125.
> >
> >
> > R1 and R2 are physical interfaces.
> >
> > I did use an interface command on the subinterface
> of the Hub - since I
> > wanted the hub to be the DR - for everything to go
> smoothly ie I wanted the
> > hub to be the DR.
> >
> >
> > The problem that we encounter in this example at
> first is that with the
> > restrictions given and the accompanying diagram.
> We are not allowed to use
> > the neighbor command to fix the Non-Broadcast
> Adjacency problem. So...
> >
> > I'm thinking why not change the network types to
> IP OSPF NETwORK BROADCAST
> > and have an election in April.
> >
> > The adjacencies will form as per my examples and
> the restrictions will be
> > honored and although the solution guide is
> unavailable, I think this meets
> > the requirements and the restrictions.
> >
> >
> > Here are the interface commands:
> >
> > Rack01R3(config-router)#do sh run int s0/0/0.123
> > Building configuration...
> >
> > Current configuration : 221 bytes
> > !
> > interface Serial0/0/0.123 multipoint
> > ip address 20.20.20.3 255.255.255.0
> > ip ospf priority 255
> > frame-relay map ip 20.20.20.1 301 broadcast
> > frame-relay map ip 20.20.20.2 302 broadcast
> > no frame-relay inverse-arp
> >
> >
> > Rack01R3(config-router)#do sh ip ospf int
> s0/0/0.123
> > Serial0/0/0.123 is up, line protocol is up
> > Internet Address 20.20.20.3/24, Area 0
> > Process ID 1, Router ID 3.3.3.3, Network Type
> NON_BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State WAITING, Priority
> 255
> > No designated router on this network
> > No backup designated router on this network
> > Timer intervals configured, Hello 30, Dead 120,
> Wait 120, Retransmit 5
> > oob-resync timeout 120
> > Hello due in 00:00:06
> > Wait time before Designated router selection
> 00:00:36
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 0, maximum is 0
> > Last flood scan time is 0 msec, maximum is 0 msec
> > Neighbor Count is 0, Adjacent neighbor count is 0
> > Suppress hello for 0 neighbor(s)
> >
> > Rack01R3(config-router)#do sh ip ospf int
> s0/0/0.123
> > Serial0/0/0.123 is up, line protocol is up
> > Internet Address 20.20.20.3/24, Area 0
> > Process ID 1, Router ID 3.3.3.3, Network Type
> NON_BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State DR, Priority 255
> > Designated Router (ID) 3.3.3.3, Interface address
> 20.20.20.3
> > No backup designated router on this network
> > Timer intervals configured, Hello 30, Dead 120,
> Wait 120, Retransmit 5
> > oob-resync timeout 120
> > Hello due in 00:00:01
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 0, maximum is 0
> > Last flood scan time is 0 msec, maximum is 0 msec
> > Neighbor Count is 0, Adjacent neighbor count is 0
> > Suppress hello for 0 neighbor(s)
> >
> > Here is the output after the ip ospf network type
> is changed from
> > non-broadcast to broadcast.
> >
> >
> > Rack01R3(config-subif)#do sh run int s0/0/0.123
> > Building configuration...
> >
> > Current configuration : 248 bytes
> > !
> > interface Serial0/0/0.123 multipoint
> > ip address 20.20.20.3 255.255.255.0
> > ip ospf network broadcast
> > ip ospf priority 255
> > frame-relay map ip 20.20.20.1 301 broadcast
> > frame-relay map ip 20.20.20.2 302 broadcast
> > no frame-relay inverse-arp
> > end
> >
> > Rack01R3(config-router)#do sh ip ospf int
> s0/0/0.123
> > Serial0/0/0.123 is up, line protocol is up
> > Internet Address 20.20.20.3/24, Area 0
> > Process ID 1, Router ID 3.3.3.3, Network Type
> BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State DR, Priority 255
> > Designated Router (ID) 3.3.3.3, Interface address
> 20.20.20.3
> > Backup Designated router (ID) 255.255.255.255,
> Interface address
> > 20.20.20.1
> > Timer intervals configured, Hello 10, Dead 40,
> Wait 40, Retransmit 5
> > oob-resync timeout 40
> > Hello due in 00:00:03
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 1, maximum is 1
> > Last flood scan time is 4 msec, maximum is 4 msec
> > Neighbor Count is 2, Adjacent neighbor count is 2
> > Adjacent with neighbor 2.2.2.2
> > Adjacent with neighbor 255.255.255.255 (Backup
> Designated Router)
> > Suppress hello for 0 neighbor(s)
> >
> >
> ===================================================
> >
> > Rack01R2(config-if)#do sh run int s0/0/0
> > Building configuration...
> >
> > Current configuration : 303 bytes
> > !
> > interface Serial0/0/0
> > ip address 20.20.20.2 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network broadcast
> > cdp enable
> > frame-relay map ip 20.20.20.1 203 broadcast
> > frame-relay map ip 20.20.20.2 203
> > frame-relay map ip 20.20.20.3 203
> > no frame-relay inverse-arp
> > frame-relay lmi-type cisco
> > end
> >
> > Rack01R2(config-if)#do sh ip ospf int s0/0/0
> > Serial0/0/0 is up, line protocol is up
> > Internet Address 20.20.20.2/24, Area 0
> > Process ID 1, Router ID 2.2.2.2, Network Type
> BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State BDR, Priority 1
> > Designated Router (ID) 3.3.3.3, Interface address
> 20.20.20.3
> > Backup Designated router (ID) 2.2.2.2, Interface
> address 20.20.20.2
> > Timer intervals configured, Hello 10, Dead 40,
> Wait 40, Retransmit 5
> > oob-resync timeout 40
> > Hello due in 00:00:07
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 1, maximum is 1
> > Last flood scan time is 0 msec, maximum is 0 msec
> > Neighbor Count is 1, Adjacent neighbor count is 1
> > Adjacent with neighbor 3.3.3.3 (Designated
> Router)
> > Suppress hello for 0 neighbor(s)
> >
> > =============================================
> >
> > Rack01R1(config-router)#do sh run int s0/0/0
> > Building configuration...
> >
> > Current configuration : 264 bytes
> > !
> > interface Serial0/0/0
> > ip address 20.20.20.1 255.255.255.0
> > encapsulation frame-relay
> > frame-relay map ip 20.20.20.1 103
> > frame-relay map ip 20.20.20.2 103
> > frame-relay map ip 20.20.20.3 103 broadcast
> > no frame-relay inverse-arp
> > frame-relay lmi-type cisco
> > end
> >
> > Rack01R1(config-if)#do sh ip ospf int s0/0/0
> > Serial0/0/0 is up, line protocol is up
> > Internet Address 20.20.20.1/24, Area 0
> > Process ID 1, Router ID 255.255.255.255, Network
> Type BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State WAITING, Priority 1
> > No designated router on this network
> > No backup designated router on this network
> > Timer intervals configured, Hello 10, Dead 40,
> Wait 40, Retransmit 5
> > oob-resync timeout 40
> > Hello due in 00:00:05
> > Wait time before Designated router selection
> 00:00:05
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 0, maximum is 0
> > Last flood scan time is 0 msec, maximum is 0 msec
> > Neighbor Count is 1, Adjacent neighbor count is 0
> > Suppress hello for 0 neighbor(s)
> >
> > Rack01R1(config-if)#
> > *Apr 18 03:24:06.353: %OSPF-5-ADJCHG: Process 1,
> Nbr 3.3.3.3 on
> > Serial0/0/0 from LOADING to FULL, Loading Done
> >
> > Rack01R1(config-if)#do sh ip ospf int s0/0/0
> > Serial0/0/0 is up, line protocol is up
> > Internet Address 20.20.20.1/24, Area 0
> > Process ID 1, Router ID 255.255.255.255, Network
> Type BROADCAST, Cost: 64
> > Transmit Delay is 1 sec, State BDR, Priority 1
> > Designated Router (ID) 3.3.3.3, Interface address
> 20.20.20.3
> > Backup Designated router (ID) 255.255.255.255,
> Interface address
> > 20.20.20.1
> > Timer intervals configured, Hello 10, Dead 40,
> Wait 40, Retransmit 5
> > oob-resync timeout 40
> > Hello due in 00:00:04
> > Supports Link-local Signaling (LLS)
> > Index 2/2, flood queue length 0
> > Next 0x0(0)/0x0(0)
> > Last flood scan length is 1, maximum is 1
> > Last flood scan time is 0 msec, maximum is 0 msec
> > Neighbor Count is 1, Adjacent neighbor count is 1
> > Adjacent with neighbor 3.3.3.3 (Designated
> Router)
> > Suppress hello for 0 neighbor(s)
> > Rack01R1(config-if)#
> >
> > Kinda nice watching those adjacencies form...
> >
> > And if I was not getting enough practice before...
> >
> > Besides, I need to show some potential employers
> out there I can explain
> > and demonstrate these tasks and mostly any others
> in my own words, so this
> > is not a waste of my time and maybe I'll trip,
> slip, fall from grace and
> > learn something that I may have missed or
> misunderstood despite my taking a
> > lot of time with the grandmasters of our sport...
> >
> >
> > I've lurked way too long... (well not quietly
> lurking but not helping as
> > much as I could).
> >
> >
>
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