[j-nsp] OSPF default problem

[Cord MacLeod]

Issue was fixed with your suggestions.  I forgot about the l2 issue  
when addressing.  Thank you for your help.


On Jan 21, 2009, at 5:45 AM, Felix Schueren wrote:

> Cord MacLeod wrote:
>> NAT works fine on the 3560.  The ex4200 can ping from 10.0.0.2 (its
>> local l3 interface) to 10.0.0.1 (the 3560's local interface).  The
>> ex4200 can already hit the internet.  It's the other devices that  
>> seem
>> to be having an issue.  They cannot hit 10.0.0.1.  The ex4200 is not
>> using vlans as of yet, only routed interfaces with ospf.
>>
>> The config for the ex4200 I've already emailed to the list along with
>> the routing tables.  As far as the 3560:
>>
>> interface Vlan666
>> description TEMP VLAN FOR JUNIPER GEAR
>> ip address 10.0.0.1 255.255.224.0
>> !
>> interface GigabitEthernet0/20
>> description TEMP FOR JUNIPER GEAR
>> switchport access vlan 666
>> duplex full
>> speed 1000
>>
>> As a note the /19 for the netmask is for BGP to advertise this  
>> block as
>> a /19.
>>
>>
> as Joe and I have pointed out, the problem is most likely that your  
> 3560
> does not have any routes back towards the "other devices" and will try
> to reach them via plain Layer2 on the Link between the C3560 and the
> EX4200 - also note that for BGP injection a recommended technique is
> creating the full network (/19 in this case) as a static discard /  
> null0
> route, then assigning more specifics out of the /19 (and distributing
> them into your IGP). This has the added benefit of blackholing all the
> unassigned space out of the /19.
>
> I highly recommend fixing your addressing (which I'd consider  
> "broken"),
> then checking your routes on the 3560.
>
> Kind regards,
>
> Felix
>
>
> -- 
> Felix Schüren
> Head of NOC
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