From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Thu Oct 13 2005 - 05:24:11 GMT-3
Uppss Sorry I forgot to add this IP MOBILE ARP
R1 Eht0/0 IP Address 10.50.50.1/29
Eth0/0 IP Address 10.0.0.1/8 Secondary
ARP R3 Int X n/n MAC-ADD R2 ETH
================================
Ethernet Media
===================================
IP MOBILE ARP 10.50.50.0 /29 (off course this is an ACL)
R2 Eth0/0 IP Address 10.60.60.2/29
redistribute mobile to OSPF (This would help R3 with the return traffic)
===================================
Cloud Running OSPF
===================================
R3
Victor Cappuccio wrote:
> Hello Simon, You are very right, but the problem here is that this PC
> (R1) is on a different subnet, than R2, and original question was that
> R1 needs a way to ping all R3 Interfaces..
>
> So
> R1 Eht0/0 IP Address 10.50.50.1/29
> Eth0/0 IP Address 10.0.0.1/8 Secondary
> ARP R3 Int X n/n MAC-ADD R2 ETH
> ================================
> Ethernet Media
> ===================================
> R2 Eth0/0 IP Address 10.60.60.2/29
> redistribute mobile to OSPF (This would help R3 with the return traffic)
> ===================================
> Cloud Running OSPF
> ===================================
> R3
>
> So maybe I think that I have to change the Subject of this email, to
> LAM Question.
>
> Thanks
> Victor
>
> simon hart wrote:
>
>>I am not sure why you are all looking into things like LAM & ODR etc to
>>accomplish what is a relatively simple task.
>>
>>The original question was the R1 does not run any routing protocol but to
>>have connectivity to all of R3.
>>
>>With such a question look for the obvious first. R1 must behave like a
>>host, such as PC. PC's do not run routing protocols but should be able to
>>ping everything within it's associated network, it does this without LAM/ODR
>>etc etc. So how does a PC gain this connectivity, well it has a default
>>gateway, that is an associated device that will find the path for it (AKA
>>router).
>>
>>So we need to make R1 behave like a PC. Simple turn off ip routing
>>
>>no ip routing
>>
>>As soon as that command is entered the router will never ever run a routing
>>protocol.
>>
>>Okay now how to packets get out of the router, easy:-
>>
>>ip default-gateway R2's IP address.
>>
>>This is really the only answer that is being looked for. Looking into
>>anything else is playing with semantics and rather confusing, and I am sure
>>does not help with learning
>>
>>HTH
>>
>>Simon
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>>De Witt, Duane
>>Sent: 13 October 2005 08:07
>>To: Javier Tomi
>>Cc: Cisco certification
>>Subject: RE: Router with out any routing Protocol
>>
>>
>>Hi
>>
>>I think it would be best to do things in steps here. I'm not disputing how
>>LAM works here, but we need layer 3 connectivity with some sort of routing
>>running between R1 and R2 before we can even start thinking about LAM. If R1
>>and R2 are in different subnets we have a straight forward layer 3 problem
>>which needs to be resolved before adding complex things like LAM on top of
>>it.
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>>Javier Tomi
>>Sent: 13 October 2005 08:43 AM
>>Cc: 'Cisco certification'
>>Subject: Re: Router with out any routing Protocol
>>
>>Correct me if I am wrong, but with LAM There is no need of both routers
>>to be on the same network. R2 will install a host route to the IP
>>address of R1, and due to proxy-arp configured on R2, it will response
>>to ARP request from R1 searching his default gateway. Of course, R2 will
>>need a route to R1 network by some means.... Isn't it?
>>
>>
>>
>>
>>Victor Cappuccio wrote:
>>
>>
>>
>>>OK, Thanks in advanced.. Any other comments
>>>
>>>
>>>De Witt, Duane wrote:
>>>
>>>
>>>
>>>
>>>
>>>>No, R2 will still be looking for something in it's own subnet as far
>>>>as I know. I'll lab it up later and check, just busy with IEWB at the
>>>>moment.
>>>>
>>>>
>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>*From:* Victor Cappuccio [mailto:cvictor@protokolgroup.com]
>>>>*Sent:* 13 October 2005 08:28 AM
>>>>*To:* De Witt, Duane
>>>>*Cc:* Cisco certification
>>>>*Subject:* Re: Router with out any routing Protocol
>>>>
>>>>
>>>>
>>>>Hello Duane, Many Thanks for your replys, maybe I'm saying something
>>>>stupid here, but R1 haves a 10.0.0.1 /8 as a secondary address..
>>>>And by adding this I will cover all subnets, right?
>>>>
>>>>Thanks again
>>>>Victor.
>>>>
>>>>
>>>>
>>>>De Witt, Duane wrote:
>>>>
>>>>R1 and R2 aren't in a common subnet, so I'm not sure what you are
>>>>trying to achieve?
>>>>
>>>>
>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>*From:* Victor Cappuccio [mailto:cvictor@protokolgroup.com]
>>>>*Sent:* 13 October 2005 08:19 AM
>>>>*To:* De Witt, Duane
>>>>*Cc:* Cisco certification
>>>>*Subject:* Re: Router with out any routing Protocol
>>>>
>>>>
>>>>
>>>>I wish to have a CCIE rack to play but for now, I just have a 3640
>>>>gift from a good Friend... (I know that only with one router would
>>>>not let me understand anything but it's cool to check weird
>>>>configurations or command parameters / Do someone from the other side
>>>>of the world (My time zone is GMT -4) have a rack that does not uses
>>>>in the night and be so generous to share it? :-) )
>>>>
>>>>R1:
>>>>interface FastEthernet0/0
>>>>ip address 10.0.0.1 255.0.0.0 secondary
>>>>! Thats why I told about to create a secondary address - I did not
>>>>finish the idea when I sent the email / I Think I'm getting Crazy with
>>>>all this stuffs.. Sorry for that
>>>>ip address 10.50.50.2 255.255.255.248
>>>>speed 100
>>>>full-duplex
>>>>
>>>>R2:
>>>>interface FastEthernet4/0
>>>>ip address 10.60.60.1 255.255.255.248
>>>>ip mobile arp access-group 2
>>>>duplex full
>>>>
>>>>
>>>>access-list 2 permit 10.50.50.2
>>>>
>>>>De Witt, Duane wrote:
>>>>
>>>>I don't think this scenario would work. LAM would require R1 and R2
>>>>
>>>>ethernet to be in the same subnet, however it will allow users on R1
>>>>
>>>>ethernet to be on a subnet allocate somewhere else in the network.
>>>>
>>>>
>>>>
>>>>If R1 and R2 ethernet are in different subnets how will you get
>>>>
>>>>communication going between the two?
>>>>
>>>>
>>>>
>>>>-----Original Message-----
>>>>
>>>>From: nobody@groupstudy.com <mailto:nobody@groupstudy.com>
>>>>
>>>>
>>[mailto:nobody@groupstudy.com] On Behalf Of
>>
>>
>>>>Victor Cappuccio
>>>>
>>>>Sent: 13 October 2005 07:50 AM
>>>>
>>>>Cc: Cisco certification
>>>>
>>>>Subject: Re: Router with out any routing Protocol
>>>>
>>>>
>>>>
>>>>Ok this one was easy, lets change the Scenario a little bit, using the
>>>>
>>>>same same topology, but now R1 is in a different Subnet than R2, so now
>>>>
>>>>we need to configure LAM on R2, and Redistributing the mobile into the
>>>>
>>>>ospf gives R3 the way to get to R1, but what about the return traffic R1
>>>>
>>>>
>>>>
>>>>-> R3?
>>>>
>>>>
>>>>
>>>>Thanks
>>>>
>>>>Victor.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>manoj menon wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>On R1#
>>>>>
>>>>>
>>>>>
>>>>>no ip routing
>>>>>
>>>>>!
>>>>>
>>>>>ip default-gateway <R2-E0-IP_ADD>
>>>>>
>>>>>!
>>>>>
>>>>>Either you can advertise the R1-R2 Ethernet subnet in OSPF, or
>>>>>
>>>>>redistribute, or static route back to R1, and redistribute static into
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>>OSPF...
>>>>>
>>>>>
>>>>>
>>>>>Comments...
>>>>>
>>>>>
>>>>>
>>>>>Regards,
>>>>>
>>>>>Mnaoj
>>>>>
>>>>>
>>>>>
>>>>>*/Victor Cappuccio <cvictor@protokolgroup.com>
>>>>>
>>>>>
>><mailto:cvictor@protokolgroup.com>/* wrote:
>>
>>
>>>>> Hello People, consider this Scenario
>>>>>
>>>>>
>>>>>
>>>>> 10.1.1.0/24
>>>>>
>>>>> R1 --- Ethernet --- R2 | Network Cloud Running OSPF | R3.
>>>>>
>>>>> ---Vlan 50 ----
>>>>>
>>>>>
>>>>>
>>>>> You are not allowed to configure any routing protocol on R1, but
>>>>>
>>>>> one of
>>>>>
>>>>> the requirements is that R1 should be able to ping any ip address
>>>>>
>>>>> in R3,
>>>>>
>>>>> how would you accomplish this? I thought to create a secondary
>>>>>
>>>>> address
>>>>>
>>>>> in R1 with an IP Classful Address Mask (10.0.0.1/8) and complete
>>>>>
>>>>> the ARP
>>>>>
>>>>> Table for R3 physical interfaces with R2 Ethernet Mac Address
>>>>>
>>>>> (since R2
>>>>>
>>>>> knows the complete network).- I Think this could work Ok / Have
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>not
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> tested yet .. Can you see another was of accomplishing this task?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Regards
>>>>>
>>>>> Victor.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>_______________________________________________________________________
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>------------------------------------------------------------------------
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>
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