[nsp] Cisco 3620 - Border Router
Giuliano Cardozo Medalha
giuliano@usp.br
Tue, 27 Aug 2002 10:48:44 -0300
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Dear. Mr Tood,
Thank you very much for you explanations.
I am very worried about memory and CPU utilization for our equipment.
Atached I sent you a picture with a MRTG graph for our 3620 CPU
utilization actually.
When I put this router making part of 5 ospf areas, it will participate
on dijkstra calculus for all 5 areas ? It mean that it will have have t
o make convergence calculus for 5 ospf areas ?
Thank you again !!!
Giuliano
> Giuliano:
>
> Your question is if the 3620 will support the load of the whole ospf database?
> Since we are breaking the network into different areas you will have the ability
> to summarize where necessary and thus reducing the load on your router.
>
> 5 areas should not be a problem depending on the amount of memory this router is
> running and it's current processor load. HOWEVER, To run ATM you must have
> atleast 48Mbs of memory in the router and here you are mostlikely pushing the
> box a little more than most people. Keeping an eye on your processor, buffers,
> and memory you can make sure you don't kill your router with the addition of
> these areas.
>
> Summarize as much as possible will help you in this process.
>
> ==DMT>
>
>
>>-----Original Message-----
>>From: Giuliano Cardozo Medalha [mailto:giuliano@usp.br]
>>Sent: Tuesday, August 27, 2002 5:13 AM
>>To: cisco-nsp@puck.nether.net
>>Subject: [nsp] Cisco 3620 - Border Router
>>
>>
>>Hi,
>>
>>I am in an OSPF project using cisco 3620 series with Fast
>>Ethernet and
>>ATM E3 interfaces (besides other devices) and I have some questions
>>about performance.
>>
>>The following picture describes the topology:
>>
>>
>> Public AS Public AS Public AS
>> | | |
>> 7000 7000 7000 14 x 2511
>> A1 A2 A3 A4
>> Campus 1 Campus 2 Campus 3 Campus 4
>> () () () ()
>> | | | |
>> | | | |
>> |_______|_________|____________| ATM / FR cloud - FRF8
>> 0
>> 0 ATM
>> 0
>> Cisco 3620
>> 0
>> 0 Fast Ethernet
>> 0
>> 0
>> 0 BI 1 - A6
>> Public AS <---###---------### -----### - Big Iron 2 A7
>> Net Iron | \
>> | \
>> | \
>> ### -----### - Big Iron 3 A8
>> BI 4 A9
>>
>>
>>The picture tries to explain the following environment:
>>
>>We have 5 major campi for a university. Campus 1 is bigger
>>than others
>>and has 6 devices: 4 foundry big iron, 1 foundry net iron and 1 cisco
>>3620. The autonomous system of the entire university is
>>private and the
>>path to the public internet is made by the Public AS described above
>>(Net Iron - running BGP4).
>>All this 6 devices runs OSPF, creating the backbone area - Area 0
>>Besides, each big iron has another area configured (A6, A7,
>>A8 and A9).
>>Each area has only one agregated group of IPv4 adresses that we can
>>summarize.
>>
>>Cisco 3620 is used to connect all other 4 campi to the major campus.
>>Each campus has its own network infraestructure and its own ospf area
>>(A1, A2, A3 and A4) with another agregated group of IPv4 adresses.
>>
>>These campi are connected to the 3620 router by Frame Relay
>>cloud with
>>the FRF8 schema - (FR / ATM).
>>
>>Cisco 3620 has one ATM interface for an E3 link to provide access to
>>these campi. Campus 1,2 and 3 has another path to the public
>>internet by
>>Nortel Shasta devices. The FR link is used only for backup.
>>
>>I would like to implement this architecture and need some
>>help, because
>>I really dont know if the 3620 router will supoort this
>>amount of load -
>>it is part of 5 ospf areas and still needs to work with 20
>>PVCs ATM and
>>1 Fast Ethernet
>>
>>Anybody could help me ?
>>
>>Thanks a lot
>>
>>Giuliano
>>
>>_______________________________________________
>>cisco-nsp mailing list real_name)s@puck.nether.net
>>http://puck.nether.net/mailman/listinfo/cisco-nsp
>>archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>
>
--
Giuliano Cardozo Medalha
Centro de Computação Eletrônica
Universidade de São Paulo
giuliano@usp.br
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